10% watering
A periodic larger watering used every week or two to find the saturation ceiling and confirm runoff behaviour.
Jeremy calls this the '10 number' on the moisture scale and uses it as a calibration, not a routine.
ep 008
🌿 Veg & Training
Post-transplant care, defoliation, trellis, stretching, plant training
140 terms
4-way corner (PVC fitting)
A PVC pipe fitting with four openings used at the top corner of a trellis frame, allowing two horizontal crossbars plus a vertical extension for a later scrog screen.
Jeremy explains you can buy 3-way corners but the 4-way is preferred when running a Grassroots trellis kit because the fourth opening leaves a hole to run a vertical PVC piece later, letting you build a scrog screen at whatever canopy height you decide on.
ep 006
5% watering
A daily watering volume equal to 5% of the container's volume, used as the default in Jeremy's living-soil watering protocol.
For a 10-gallon container this is half a gallon per watering — small, frequent, and designed to keep the soil in the 4-6 moisture band.
ep 008
50 watt Cobb chip
A Chip-on-Board LED module rated at 50 watts per chip, used as the building block of the 600W Timber Cobb fixture (twelve 50W Cobbs).
Jeremy identifies his overhead quadrant-one fixture as a 600W total Cobb-style Timber light — each of the large round chips is a 50W Cobb and the whole unit is dimmable.
ep 011
60 percent yield step-up rule
Going from a 7.5 gallon container to a 15 gallon container in living soil should give roughly a 60% yield increase — not linear with volume.
Jeremy's rule of thumb — doubling soil does not double yield, you get diminishing returns. Used to set expectations about stepping up pot size.
ep 011
apical meristem
The growing tip at the main stock of the plant — the leader that drives vertical growth.
AJ calls out an apical meristem sitting lower than the rest of the plant — not typical — and explains that bending it down promotes other tips upward for an even canopy.
ep 025
apical meristem dominance loss
When a plant self-selects which flowers or fruits to terminate because it cannot fill all of them.
Jeremy uses the savings account analogy — the tomato put out a thousand flowers and decided it could only fill five, so it terminates the rest.
ep 029
auxin hormone
Plant growth hormone concentrated in the apical tip — when the top is bent down, auxin redistributes and side branches become dominant.
Jeremy explains that pinching the top bends it over, so all side branches 'get that auxin hormone' and compete to be king of the hill.
ep 017
back off strategy
Deliberately withholding water for 4–5 days to let an over-watered plant recover after a light root-zone tea application.
Jeremy saved the overwatered plant in quadrant 3 with a basic worm casting tea then no water for 4–5 days.
ep 018
bamboo pole support
Using thin bamboo stakes pushed into the soil near individual branches and held to them with clips or ties to provide support instead of a horizontal trellis net.
Jeremy uses thin bamboo instead of the thicker stronger ones because thinner poles rip fewer roots going into the soil. He uses them in the earth box quadrant where he is not running PVC trellis.
ep 022
bare legs (shaving the legs)
Stripping every lower branch and leaf that sits under the canopy and will never receive enough light to produce quality bud.
Jeremy does this by pinching with his fingers rather than scissors because tender growth is easier to pinch and scissors risk cutting the wrong branch. 'I'm kind of shaving her legs up'.
ep 012
between-grow fan maintenance
Disassembling and compressor-blowing oscillating fans between grows to extend their service life.
Jeremy calls this the single biggest thing growers can do to make fans last — take it apart, clean it, blow it out with a compressor.
ep 011
Bolting (lettuce)
When lettuce or similar leafy greens respond to a lighting or temperature change by shooting up a stock and attempting to produce seed — leaves become bitter and the plant is usually harvested at that point.
Jeremy explains lettuce bolts under stress (temperature, heavy harvesting) and tells viewers this is why the greenhouse flips the bed every four harvests.
ep 010, ep 024
bonsai mother
A cannabis mother plant kept small in a small container (like a 1-gallon) and trimmed to maintain a compact shape while still providing cuttings.
Jeremy plans to bonsai his new mothers down if they overgrow their 1-gallon pots while waiting on flower results.
ep 021
Bottom watering
Filling an Earth Box through its reservoir fill tube until water runs out of the overflow tube, which is the signal the reservoir is topped up and the plant will wick moisture up from below.
Jeremy warns against bottom watering at transplant — only once the plant is visibly growing and roots have spread to all parts of the container.
ep 010, ep 012, ep 022
burnt leaf tips
Crispy brown tips along leaf edges caused by excessive nutrient salt concentration when the soil dries down too hard — the biology is making nutrients available but the remaining water carries too high a dose.
Jeremy explains burnt tips as a symptom of under-watering plus active biology — when moisture drops, sodium and excess nutrients concentrate in the small remaining water volume.
ep 011
candelabra plant shape
A many-armed, evenly balanced plant structure where lateral branches form a ring around a cleaned-up trunk.
Jeremy describes one defoliated plant as having become 'the most kind of candelabra' after thinning.
ep 015
cannibalized (bed dominance)
When two plants share a bed and one outgrows/outshades the other, the stronger plant dominates light, root volume, and yield at the expense of the weaker one.
Jeremy uses 'cannibalized' for the Earth Box Branson's: 'when you're in a bed and you have two different speeds of growth or two different heights of stretches, can really make a difference on the production of the inferior plant.'
ep 035
canopy evenness
A flat, uniform-height canopy across the grow area so all sites receive similar light intensity.
AJ teaches that bending a taller leader promotes laterals upward to make that even full canopy.
ep 025
Canopy height management
The practice of training, bending, and timing the flip so that the tops of all plants reach a uniform height and distance from the light.
The Season 1 mixed-genetics mistake broke canopy height management because stretchers out-climbed non-stretchers.
ep 042
canopy management
The ongoing decisions about which branches to keep, remove, pinch, or bend to maintain an even flowering canopy under flat LEDs.
Jeremy emphasises it is the canopy that determines yield, not the number of plants, and that number of plants only determines how fast you fill the canopy.
ep 014, ep 017
cleaning the legs up
BuildASoil phrase for defoliating the lower half of the plant so the stalk and lower branches are bare — creating airflow and focusing growth at the top.
Coined in this episode as the label for his defoliation pass before flip.
ep 015
container-to-canopy rule
Jeremy's sizing heuristic: a plant is the right size to flower when its veg footprint roughly matches the shape of its container. Running a plant two to four times the size of its container pushes you toward hydro-style feeding demand.
This is why he uses container choice as a calendar — the plant hits target size at the container's natural limit and is ready to flip.
ep 012
container-to-plant-size relationship
In living soil the ratio of pot volume to plant size must be planned because plants will roughly double in height after the flip to flower and can outrun the soil's nutrient bank.
Jeremy warns that living-soil growers cannot force-feed a small container the way hydro can — you must plan veg length to end before the plant outgrows the soil.
ep 011
Cut-and-come-again lettuce
A dense-sown lettuce patch harvested by cutting rather than pulling full heads, letting the stubs regrow for a second and third cut.
Jeremy sows the Five Star Greenhouse mix densely because he's going to chop it rather than harvest full heads.
ep 030
defoliate
The act of selectively removing fan leaves to open up light penetration and airflow through the canopy.
Jeremy says he may defoliate tomorrow or the next day, and notes commercial facilities usually don't defoliate because labor is too expensive.
ep 020
defoliation
The deliberate removal of cannabis fan leaves — usually lower leaves or leaves blocking light to other branches — to manage canopy density, airflow, and light penetration.
Jeremy's rule: remove everything from the stalk up to about halfway up the plant, one branch at a time, then do it again later during stretch. He removes fan leaves along with suckers — not the tomato approach of leaving the fan leaf.
ep 014, ep 015, ep 017, ep 022, ep 024, ep 027
defoliation (late flower)
Selective removal of lower rainbow/shade leaves in late flower to increase airflow and clean up the understory.
Jeremy plans to 'defoliate some of those rainbow lower leaves down there' in quadrant four after moving a plant out to access the back.
ep 035
defoliation for flat-light canopies
Removing the biggest fan leaves so light can reach lower and side branches evenly, compensating for the fact that an indoor grow light does not rotate around the plant like the sun.
Jeremy frames it as a correction for the unnatural geometry of indoor lighting: outdoors the sun moves, so leaves self-shade only briefly; indoors a static fixture creates permanent shade zones that must be hand-cleared.
ep 012
DIY bamboo trellis screen
A trellis built from four bamboo corner poles in the container corners and horizontal bamboo crossbars lashed across to form a square grid.
Jeremy mentions Jay Plant Speaker does this in his greenhouse with thicker bamboo. The benefit is you can cut the ties at harvest, pull the frame apart, and flip the whole plant upside down without unweaving it through a net.
ep 022
DLI
Daily Light Integral — the total amount of photosynthetically active light delivered to a canopy across a 24-hour period. Sets both the minimum and maximum light your plants should receive daily across the photoperiod.
Jeremy references a previous video on DLI and warns that powerful LEDs at 18-24 hours on 100% can deliver too much DLI if plants are too close.
ep 005
DLI (daily light integral)
Total amount of photosynthetically active light a plant receives over a full day. Related to both the power of the light and the number of hours it is on.
Jeremy urges viewers to look up DLI as the term that ties together light intensity and photoperiod for making sense of whether a plant is getting enough light.
ep 009, ep 017, ep 031
DLI (daily lighting integral)
The total amount of photosynthetically active light a plant receives over one day — a function of intensity (PAR) multiplied by hours of illumination.
Jeremy name-drops DLI as the key metric to learn — plants want a specific DLI for veg and a higher one for flower. Recommends looking up manufacturer specs or a PAR meter to dial it in.
ep 011, ep 019
droopy plant diagnosis
A drooping plant is either over-watered or under-watered — diagnose by comparing against your own watering log and the additional symptoms.
If under-watered you'll also see crispy or burnt tips; if over-watered you'll see lower leaves fading to lighter green. Jeremy frames this as the two-branch diagnostic every grower needs to learn.
ep 011
dry pockets
Hydrophobic zones inside the container where water refuses to absorb, channeling around them.
Jeremy flags this as a diagnosis when runoff appears too soon at small watering volumes.
ep 008
dry-down period
Scheduled cycle in soilless/cocoa/rockwool media where the media is allowed to noticeably dry before the next irrigation so nutrients can be re-delivered.
Jeremy contrasts this with living soil, where a full dry-down is not appropriate because biology needs steady moisture.
ep 008
Earth Box reservoir dry-down rule (BuildASoil)
When running BuildASoil living soil in an Earth Box, the reservoir must be allowed to go completely dry between waterings instead of kept full (as the Earth Box manufacturer recommends) — this keeps oxygen in the root zone.
This is BuildASoil's direct override of Earth Box's own use instructions. The BuildASoil mix is heavier and more natural than potting mix, so letting the reservoir dry prevents anaerobic conditions.
ep 011
fan front-plate removal
Removing the front protective grill of an oscillating fan to reduce load on the internal plastic oscillation gears — extends fan life at the cost of some safety.
Jeremy does this on his oscillating fan because the plastic gears are the first component to fail in humid grow rooms. Keeps the rear cage on to protect fingers.
ep 011
Fan wind burn
Leaf damage from a fan blowing directly and repeatedly on the same leaves causing mechanical rubbing and desiccation.
Used here as a diagnostic — the burnt leaves cluster on the trellis at the spot where Jeremy thinks the fan-created air vortex points, which correlates with where pollen deposition occurred.
ep 028
farmer's shadow (best fertilizer)
An old gardening adage — the best fertilizer is the farmer's shadow — meaning the grower's presence and attention to the plants, tending and observing every day, is what keeps problems from compounding.
Jeremy quotes this when explaining why manual watering matters even though his system is automatic. Presence catches problems faster than any input can fix them later.
ep 024
feeder roots
Fine branching roots, often called fishbone ladder roots, that develop near the surface in response to a food source — they uptake nutrients much faster than deeper structural roots.
Jeremy shows them developing right in the mulch layer as proof that his preload strategy worked. Without pre-developed feeder roots a top dress only releases as fast as water solubility allows.
ep 008, ep 011, ep 014, ep 015, ep 017, ep 020
fresh air CO2 delivery
Using the exhaust-fan cycle to pull CO2-rich outside air into the tent to replace CO2 depleted by photosynthesis — the primary reason to cycle the fan even when temps are fine.
Jeremy explicitly calls CO2 'like oxygen to us' for plants and ties the tent fan cycle to delivering it.
ep 011
fully running vs limping
Jeremy's shorthand for plant health readiness at flip. A 'fully running' plant is in peak vigor and ready for flower; a 'limping' plant is still recovering and will underperform through flower if flipped now.
He explicitly will not flip any plant that is limping. The diagnosis is done by walking the canopy quadrant by quadrant in the morning.
ep 012
grow room controller
A device — typically a smart power strip — that both reads the grow-room environment and automatically switches plugged-in devices (lights, fans, humidifiers) to keep conditions in range.
Jeremy's Niwa Grow Hub is his example, described as a 'go-between' between a basic timer and a thousand-dollar commercial room controller.
ep 019
grow room monitor
A device that logs and graphs grow room environment (temperature, humidity, PAR, CO2) and sends alerts when conditions drift, as opposed to a controller that actively drives equipment.
Jeremy distinguishes monitor (Pulse, Pulse Pro) from controller (Niwa). He stresses smooth graph lines mean a dialed room and erratic lines mean something is wrong like a humidifier out of water.
ep 019, ep 022
halitosis
One of the cannabis cultivars running in the tent — longer hairs, smaller tighter calyxes, tends to grow stretched.
Jeremy compares halitosis structure directly against branson's royal under canopy in quadrant two. Long hairs and smaller calyxes typically correlate with more stretched-out plant growth.
ep 011, ep 028
Halitosis (cultivar)
A cannabis cultivar described here as a motor breath cross, planted in quadrant two of the 10x10.
Motor Breath x unknown; Jeremy shows it as a healthy young plant with nine leaflets
ep 004
Hand pollination (tomato)
Manually transferring pollen on indoor tomato flowers because there are no wind or insects to move it naturally.
Jeremy says the quadrant 4 tomato plant is producing flowers and he'll show how to hand-pollinate because indoor plants won't always pollinate on their own.
ep 006
hang time
Jeremy's term for the 24–48 hour rest period he gives plants after defoliation, training, top dressing and tea before flipping to flower, letting them rebalance and recalibrate.
He wants to let plants recover from all the activity before switching to 12/12.
ep 014
high stress training (HST) / super cropping
Pinching both sides of a stem hard enough to damage internal fibers without snapping, so the plant heals stronger and more open.
Jeremy describes super cropping as pinching both sides to slow the top and force side growth.
ep 017
humidifier-fan cycle
The coupled cycle where the exhaust fan kicks on at temp, drops humidity, and triggers the humidifier to pump RH back up — tuning the fan trigger keeps plants in a consistent VPD.
Jeremy runs the fan trigger at 78 F, the fresh air pull drops RH, the active-air commercial humidifier fires to hold RH steady while the plants get fresh CO2.
ep 011
humidity dropout stress
When a humidifier fails and ambient RH drops, any plant that was already slightly underwatered will be the first to show droop in the morning while its peers still look happy.
This is how Jeremy diagnosed the weaker plant in quadrant three — the humidity 'cut out' overnight and only the already-underwatered plant drooped.
ep 012
keeper selection
Picking the single best phenotype from a seed run to clone and re-run in the same soil for the next round.
Jeremy says he wants to finish this run, select a keeper, and re-run it in the same no-till beds as his training demo.
ep 011
Kelvin / color temperature
A unit measuring the colour temperature of a light source; for grow lights it roughly maps to spectrum, with lower values (3000K) appearing redder and higher values (4000K) bluer.
Jeremy prefers 3500K as a full-cycle middle ground
ep 004
laser thermometer
A handheld infrared thermometer that reads surface temperature from a distance, used here to measure leaf surface temperature.
Jeremy says 'one of those little lasers like for the kitchen' will do the job for reading your leaf surface temperature.
ep 019
leaf surface temperature
The temperature of the actual leaf surface, which can be meaningfully higher (under HPS) or lower (under LED) than the ambient room temperature and is the figure that actually matters for VPD.
Jeremy recommends a kitchen laser thermometer to measure it, and notes LEDs can give a leaf surface ~2F below ambient while HPS can push leaves well above room temp.
ep 009, ep 019
Leaflet count
The number of leaflets on a cannabis fan leaf (up to nine or eleven); Jeremy uses it as a simple visual measure of plant vigour and development stage.
He counts nine leaflets on young plants in quadrant two
ep 004
leaves as solar panels
The metaphor that cannabis fan leaves are the plant's photovoltaic cells — they ARE what is receiving the light and generating plant energy, which is why you shouldn't over-defoliate even when they appear to shade branches.
Jeremy uses this framing to warn viewers not to go crazy pulling leaves — a leaf that looks like it's just blocking light is also the organ receiving that light.
ep 024
LED strip fixture (horticultural)
A grow-light form factor that uses many small LED chips laid out along strips instead of large Cobb chips — typically gives more uniform light spread at equal power.
Jeremy contrasts the Timber strip-style with the Cobb-style and notes strip fixtures give more uniform light. Both perform well but he prefers the strip for uniformity.
ep 011
lollipopping
Removing lower side branches and leaves from a branch so only the top bud site remains — keeps energy focused on the canopy.
Jeremy lollipops low branches that are too shaded to reach the screen, explaining it saves trim work later and improves airflow.
ep 017
low stress training (LST)
Bending and tying branches to shape a plant without breaking tissue — distinct from high stress or super cropping.
Jeremy says he rarely ties with string — prefers pinching, bending, or a screen. LST uses bending and string.
ep 017
lower lateral clean-up
Stripping off small lower branches that won't reach the canopy so plant energy routes into upper cola development.
AJ says clean up lowers sooner rather than later — ideally before day 21 — because the prize nug is all on top.
ep 025
lung room
The room outside the grow tent that the tent pulls its passive intake air from — humidifying the lung room is an alternative when the in-tent humidifier can't keep up.
Jeremy suggests putting a large humidifier in the lung room instead of the tent if you have a small in-tent humidifier that can't recover fast enough.
ep 011
main stock
The primary vertical stem of the plant that serves as the apical meristem and leader.
AJ uses main stock and apical meristem interchangeably when describing which branch leads canopy height.
ep 025
Metal halide (MH)
A legacy high intensity discharge lamp with a bluer spectrum that Jeremy historically used for vegetative and sometimes flower stages.
He preferred flowering under metal halide over HPS for more frost
ep 004
minimal training approach
A plant-control style where only a basic trellis screen and light pinching are used, instead of aggressive topping and defoliation.
Jeremy's stated plan for the 10x10 — build a screen, do minimal training, flip to flower fast, show viewers a simple process rather than a maxed-out screen.
ep 011
moisture scale 1 to 10
Jeremy's heuristic where 1 is bone dry, 5 is perfect, and 10 is soaking wet — the target is to keep living soil between 4 and 6 at all times.
This is the central rule-of-thumb for the whole watering section and his answer to 'how often do I water.'
ep 008
monkey fan
A small cheap clip-on fan with multiple mounting adapters, designed to clip onto grow tent poles or trellis nets for localised airflow.
Jeremy describes mounting a monkey fan down inside a trellis to push air under the canopy and keep fungus gnats from establishing. He also warns their plastic motors break, so treat them as fixed-place disposables.
ep 012
Mono-cropping
Growing the same single genetic across an entire bed or quadrant rather than mixing cultivars, to make canopy height, stretch, and feeding predictable.
Jeremy explicitly identifies mono-cropping as the better path for beginners running from clones because it removes the stretch-mismatch problem.
ep 042
Mono-cropping (container)
Growing one genetic per container rather than mixing multiple strains in one pot. Allows each strain's strengths and weaknesses to be properly evaluated.
Jeremy realises after seeing the Quadrant 1 mixed container that slower stretchers got dominated — he recommends mono-cropping a favourite genetic in one large container.
ep 033
natural plant shape
Letting a cannabis plant grow untopped and untrained so its genetic structure reveals itself for phenotype selection.
Jeremy refuses to top or train during a seed-run keeper hunt because he wants to judge natural form.
ep 007
negative pressure
A tent state where the exhaust fan pulls more air out than any intake lets in, so the tent walls suck slightly inward and stale air never sits inside.
Some growers prefer negative pressure so nothing is 'hanging out in their grow room'.
ep 009
nine to eleven leaflets rule of thumb
Jeremy's visual health check — a healthy seed-run cannabis fan leaf should show nine to eleven leaflets. Hitting that count is his quick proxy for peak vegetative health.
He counts them out on camera (one, two, three... nine) to demonstrate on an early-stripped fan leaf.
ep 012
Number 2 (cultivar)
A cannabis cultivar Jeremy refers to as 'the number two', also growing in quadrant two alongside the halitosis.
Shown as a healthy young veg plant
ep 004
orange vining clips
Snap-on plastic clips used on farms to vine tomatoes and cucumbers onto strings or stakes, used here to clip cannabis branches loosely onto bamboo poles.
Jeremy says they normally pinch the string for tomatoes and cucumbers but here he is just clipping the branch directly to the bamboo pole at an open spot on the branch.
ep 022
over-watering
Applying more water than the medium can process, which stunts plant growth and can be made worse by adding more water trying to correct the initial mistake.
Jeremy admits he over-watered the back-right quadrant twice and the plant ended up being the most resilient finicky winner.
ep 008, ep 042
PAR
Photosynthetically Active Radiation — the light bandwidth plants use for photosynthesis, read with a PAR meter to measure intensity at canopy. Jeremy reads around 500 PAR at canopy with his lights at 100%.
Used to set canopy light intensity when running LEDs at 100%.
ep 005
PAR (photosynthetic active radiation)
The band of light that plants use for photosynthesis, measured as photons per square meter per second — the raw intensity input into DLI.
Jeremy reads approximately 500 PAR at five feet above the canopy on his Timber Cypress 8s and calls that ideal for this veg stage.
ep 011
PAR (photosynthetically active radiation)
The range of light wavelengths that plants can actually use for photosynthesis — the light the plant 'sees'. Measured in micromoles per square meter per second.
Jeremy takes PAR readings at canopy height to decide if plants are at even coverage and appropriate intensity for flower. He got about 430 to 440 on the Pulse Pro and 470 on his expensive PAR meter at the same location.
ep 004, ep 019, ep 022, ep 031
PAR reading at canopy
A photosynthetically active radiation measurement (in µmol/m²/s, also called PPFD) taken right at the top of the plant canopy to set light intensity.
Jeremy measures about 500 µmol at his canopy and calls that 'plenty based on the number of hours of light I have'.
ep 009
passive intake
A tent ventilation scheme where only an exhaust fan runs and replacement air is pulled in through the tent seams by the resulting negative pressure.
Jeremy's default: 'the only way air gets in the tent is from the negative pressure, the tent kind of sucks in a little bit'.
ep 009
passive ventilation (tent)
Air intake vents on a grow tent that let outside air flow in automatically whenever the exhaust fan pulls air out, without an active intake fan.
Jeremy uses passive intake — when the 78 F temp trips the exhaust fan, fresh CO2-rich air flows in through passive vents.
ep 011
pepper dimpling (indoor)
A physiological disorder sometimes seen on indoor peppers where the leaves develop small dimpled spots, usually related to humidity or nutrient stress.
Jeremy is relieved his pepper plant is not showing any dimpling despite the tent humidity — a sign the plant is happy in the 3.0 mix.
ep 011
pinch
Physically crushing a stem between your fingers to slow its growth and redirect energy to other branches.
Jeremy lists pinching as one way to slow a plant that's running toward the light too fast.
ep 020
pinch topping
A cannabis training move where the growing tip is pinched or topped to force the plant to branch out — Jeremy mentions he'd do this on a single-plant bed.
He contrasts with his four-plant bed where he doesn't bother training. Says he has a preference and will cover it in a dedicated plant-control episode.
ep 011
pinching
Gently squeezing and bending a main stem to crease it without snapping — a low stress training technique that redirects auxin.
Jeremy pinches then bends, cautioning 'if you don't pinch it'll just snap' — he expects the branch to stand back up in an hour and re-pinches.
ep 017
Plant count
The legal or practical number of plants a grower can run at once. Jeremy argues that plant count — not training — is the real limiter, and that 90% of training techniques exist only to compensate for low plant counts.
Drives the philosophy of 'more plants, less training, less veg time, more harvests per year, better top quality.'
ep 005
positive pressure
A tent state where a low intake fan runs continuously, pushing more air in than the exhaust removes, so the tent walls bow slightly outward.
Jeremy mentions growers who like running a low intake 24/7 and 'say they really like it'.
ep 009
Prayer leaves
Cannabis leaves that angle upward toward the light when the plant is healthy and happy, often reaching peak expression when transpiration is strong.
AJ notes the plants are in prayer but starting to soften back down from water weight pulling on the leaf after the morning watering.
ep 026
praying leaves
A vertical leaf lift posture driven by turgor pressure, commonly read as a sign of proper environment and watering.
AJ points out the uniformly praying leaves as a great garden indicator.
ep 025
pre-launch checklist
Jeremy's own term for the final set of actions before flipping to flower: top dress, trellis, train/defoliate, brew and apply compost tea, take clones, then 24–48 hours hang time before switching to 12/12.
Jeremy frames the entire episode around this checklist. He will not flip until all plants show full vigor and any water-stressed plants have rebounded. The goal is to take off smoothly into flower with the best quality and best yield.
ep 012, ep 014
Pruning discipline
The practice of staying on schedule with leaf removal and tucking through the scrog — small regular sessions rather than letting tasks pile up into labor debt.
Skipping pruning creates problems indoors, lowers yield, and builds up labor that takes forever when you finally catch up.
ep 042
PVC corner trellis kit
BuildASoil-supplied plastic corner fittings that connect lengths of PVC pipe to build a trellis frame and bed skeleton inside a 3x3 fabric bed.
Corners ship with the kit, but straight PVC must be bought and cut locally for shipping efficiency; legs go inside the bed
ep 004
quadrant walk-through
Jeremy's weekly diagnostic routine — physically walking each of the four quadrants of the 10x10 tent in turn to compare recipes, genetics and container types side by side.
He uses it both to catch problems (water stress, pests) and to keep the different trial variables honest.
ep 012
quantum flux meter
A meter that measures photosynthetic photon flux density (PAR) at a point, used to characterise grow-light intensity at the canopy.
Jeremy's Apogee unit is his benchmark and he plans to compare it to the Pulse Pro's built-in PAR reading.
ep 019
Radish interplanting
Sowing a quick-cycle crop like radishes alongside a longer-cycle one — they can finish and be pulled before the main crop flips.
Jeremy says radishes take about 30 days and can be slotted into a 4x4 or 100 gallon pot during veg and pulled before flower.
ep 030
Reveg
When a plant that has begun flowering reverts back to vegetative growth.
Mentioned specifically about Long Valley Royal Kush grown outdoors — if planted too early (end of May or first week of June) it tries to flower and then reveges.
ep 027
rootbound
State where roots have filled the container such that the plant drinks through the available water very quickly.
Jeremy says it's almost impossible to overwater a rootbound plant because it chews through water too fast — so err wet in a small container with a big plant.
ep 008
runoff
Water that exits the bottom of the container during watering.
Jeremy tells growers NOT to water to runoff in living soil because it flushes the nutrients you paid to build — except when intentionally finding the saturation ceiling.
ep 008
Sakura cherry tomato
A cherry tomato variety Jeremy is transplanting into Quadrant 4 to demonstrate indoor tomato growing with better results than the large tomato he had in a small 3 gallon container.
Jeremy prefers cherry tomatoes over large tomatoes for indoor grows.
ep 033
screen of green / trellis layer
A horizontal net used to train cannabis canopies flat and evenly during flower stretch. Additional layers can be added as the plants grow through the first.
Jeremy put a second layer of screen on day 8 and by day 10 tops are already hitting it in quadrant one.
ep 024
SCROG / screen of green
A horizontal trellis net or grid that forces lateral plant growth for an even canopy under flat LED lights.
Jeremy has PVC trellises in some quadrants and plans a second SCROG screen layer above for the taller plants — can guide the top over and through a new hole.
ep 017
Scrog screen
A horizontal trellis net or frame (screen of green) the plant is woven into and trained through to keep the canopy flat and maximise bud-site exposure to the light.
Jeremy references that the PVC frame gives the 3x3 bed an anchor point for building a scrog screen at the canopy height of the cannabis plants, decided later once growth is established.
ep 006, ep 014, ep 020, ep 022, ep 042
second scrog layer
A second horizontal screen installed above the first at a height matching the current tallest growth, used to support and further train branches during the stretch.
Jeremy plans to put the second layer in this week, roughly 14 inches above the first.
ep 020
second trellis layer
A second horizontal trellis net or frame installed above the first trellis during the stretch phase of flower to catch the canopy as it grows through the lower net and control height relative to the light.
Jeremy installs the second layer on day 8 of flower in quadrant one using pre-cut PVC about 14 inches taller than the first layer. He stresses the exact height is arbitrary because the real purpose is keeping the canopy at the right distance from the light.
ep 022
Square foot gardening method
A plant spacing reference where plant density is set to roughly one plant per square foot. Jeremy uses it as his ceiling for cannabis plant density (9 plants in a 3x3, 16 plants in a 4x4).
Used as the upper plant-density limit.
ep 005
staking out
Pulling outer branches outward away from the plant center and anchoring them there to open up the interior canopy so more light can penetrate.
Jeremy says staking out the sides also supports center branches because the outside support propagates through. He opens the canopy this way on the bamboo pole quadrant.
ep 022
stomata
Microscopic pores on a leaf that open to take in CO2 and release water vapor as part of photosynthesis and transpiration.
Jeremy explains that under intense light stomata open to take in CO2, but in dry air they can dry the plant out — which is why humidity must scale with light intensity.
ep 019, ep 021
structural integrity via airflow
The idea that constant airflow from an oscillating fan builds stem and leaf strength, preparing the plant for flower weight.
Jeremy mentions this as a secondary reason for oscillating fans besides CO2 exchange — plants that are blown around grow stronger stems.
ep 011
suckers (tomato)
The vegetative branch that grows out of the crotch between the main stem and a leaf branch on a tomato — removed to keep energy moving up the main vertical leader when vining.
Jeremy removes a sucker above a fruiting branch to keep the tomato climbing a string vertically toward the tent ceiling.
ep 011
super crop
Pinching and bending the main stem to break internal fibres without snapping the skin, redirecting apical dominance down to lower branches to flatten the canopy and control plant height.
Jeremy says he 'typically' super crops the taller plants so lower branches come up and height is managed. He did not do it in this run because he is keeping natural structure for keeper selection.
ep 012
thinning radishes
Removing excess seedlings so each radish has enough root space to form a properly shaped bulb.
Jeremy says to leave 'about the size of an egg' of space between each radish so they can fully form and slice cleanly.
ep 035
three-way vs four-way PVC corner
PVC corner fittings that join either three or four pipes at a junction; four-way corners leave the top open for a third trellis layer, three-way corners close off the top with a finished look.
Jeremy notes the three-way corners on this tent do not allow a third layer, while the back tent has four-way corners in use on the first layer so he could add a third if needed. It is mostly a finish look preference.
ep 022
top water vs bottom water
Top watering is applied from above through the mulch; bottom watering is delivered via an Earth Box reservoir so roots pull water up from below.
Jeremy top-waters Earth Boxes at transplant, then bottom-waters through the fill tube once new growth proves the plant is established and drinking.
ep 011
topping
Cutting the growing apical tip of a plant to force lateral branches to take over as co-dominants.
Jeremy says he normally doesn't top but topped one plant in this run to let side branches fill the space when the plant was oversized.
ep 015
Topping / bending the top
Bending or pinching the dominant top of a plant to redistribute hormone signals and force bushy lateral growth.
Jeremy bent the top and pinched new growth to bush out the recovering over-watered plant.
ep 042
transpiration
The movement of water from the soil through the plant and out through the stomata as water vapor, driven by VPD.
Jeremy lists transpiration alongside stomata and CO2 as the three things VPD drives.
ep 019
transpiring
The process of plants pulling water up through their roots and releasing it through their leaves as water vapour, which drives nutrient uptake and cools the leaf.
Jeremy notes that even the young seedlings are 'transpiring' which is why airflow and RH management matter even before transplant.
ep 009
Trellis kit (Grassroots)
A PVC framework kit designed to fit into Grassroots fabric beds, using corner fittings and pipe to support a trellis or scrog.
Jeremy uses the Grassroots-generated cut sheet that comes with the trellis kit, and emphasises that the 4-way corner version is preferred over the 3-way for scrog capability.
ep 006
Trellis roller
An overhead roller bar used to wind trellis string upward as vegetable plants grow, keeping the plants vertical all season.
Jeremy points at an overhead roller already installed in quadrant four and plans to use the same roll-up technique used on greenhouse tomatoes.
ep 010
Trellis screen
Horizontal netting used to hold cannabis branches level and define the canopy line — also the physical reference for where to strip below.
Jeremy uses the trellis as his cut-line for defoliation — if a branch or leaf isn't reaching up through the screen to the top light, it gets stripped.
ep 028
triple-node phenotype
A cannabis growth pattern with three leaves/branches at each node instead of the normal two — sometimes tied to unique vigor or shape.
Jeremy highlights one plant that has been a triple at every node since day one while the others are all double — flagged as interesting for keeper evaluation.
ep 007
tucking and weaving
Light daily plant training where taller branches are bent down and side branches are tucked under the trellis so the canopy stays even.
Jeremy bends Quadrant 1 tall branches back over to keep others from getting shaded out.
ep 018
tulsi
Holy basil (Ocimum tenuiflorum) — an adaptogen cultivated for 4,000 years in India, considered medicinal, with a scent of vanilla, anise and bubble gum.
Jeremy plants two cups of tulsi in Quadrant 4 as a companion and plant-extract-tea source, noting every home in India has one.
ep 029
Tulsi / Holy Basil
A medicinal basil species (Ocimum tenuiflorum) distinct from culinary basils, with cooler aroma notes — Jeremy's batch has bubble gum funk. Used for tea and medicine.
Jeremy starts tulsi in Quadrant 4 cups — mentions it's also good for garden teas, top dressings, and compost.
ep 033
Turgor
The firmness of plant leaves and stems due to water pressure in cells — a visual indicator of plant health and hydration.
Jeremy looks for vertical new growth with good turgor as a sign of healthy water status and says a healthy plant can hold turgor even when slightly under-watered.
ep 004, ep 015, ep 020
turgor (plant)
The ability of a healthy leaf to lift itself up and hold its shape under its own water pressure — the primary visual sign of plant hydration and health.
Jeremy teaches turgor as the first thing to look for after transplant — leaves that reach for the light with lifted tips mean the plant has transplanted well.
ep 011
Turgor and vigor
Full tissue pressure (turgor) combined with healthy active growth (vigor) — the baseline state a plant should be in before flipping to flower.
Jeremy won't flip a recovering over-watered plant until he sees 'full color turgor and vigor'.
ep 042
turgor pressure
The internal hydraulic pressure in plant cells that causes leaves to pray and the plant to look visibly hydrated after feeding.
Jeremy expects to catch the visible reaction next episode when he uses fresh sprouted seed tea on camera — prayer, turgor and visible health boost.
ep 025, ep 029
under-watering
Insufficient water that concentrates whatever soluble salts are present in the remaining pore water, producing burnt-looking tips.
Jeremy explains it mimics fertilizer burn because the biology-released nutrients sit in too little water — potentially sodium or other solubles.
ep 008
vine clips (BuildASoil)
Small specialty plastic clips with a wedge designed to pinch a string and hold a plant stem in place along it — also usable on bamboo stakes.
Jeremy demonstrates these holding a tomato stem to a vertical string; they don't hurt the plant and let you set pinch points anywhere along the string.
ep 011
VPD
Vapor Pressure Deficit — a combined measure of temperature and humidity used to drive environment setpoints. Look up a VPD chart, find your temperature, and the chart gives you the corresponding humidity you should run.
Jeremy uses a VPD chart as his sole framework for setting tent temperature and humidity.
ep 005
VPD (vapor pressure deficit)
The difference between how much moisture the air could hold and how much it actually holds, at a given temperature — the core environmental framework Jeremy uses to dial in temp and RH.
Jeremy says 80 degrees Fahrenheit and 50 percent relative humidity is about 1.8 VPD and is the target that both the Niwa and Pulse Pro confirmed. He references the Pulse VPD calculator spreadsheet.
ep 009, ep 011, ep 019, ep 022, ep 031, ep 042
VPD chart
A reference table that pairs a grow room temperature with the target relative humidity to maintain ideal vapor pressure deficit. Jeremy recommends looking one up and matching your numbers.
Jeremy tells viewers they don't need to do the math — just find where their temp and humidity meet on the chart and stay in the green zone.
ep 005, ep 019
weakest link
The limiting factor in any growing environment — whichever variable (temp, light, water, CO2) is currently holding back plant performance must be addressed first.
Jeremy invokes this rule to justify leaving peppers/tomatoes indoors under ambient tent light instead of moving them to the cold greenhouse — the cold was the weakest link there, light is the weakest link here, so he rotates trays to compensate.
ep 011
weakest link (environment)
The environmental parameter (temp, humidity, airflow) that is most out of range in a given room — fix that first rather than optimising the ones already in range.
Jeremy: 'I think that we should look at the weakest link'.
ep 009
weakest link principle
The rule that a grow room should first address whichever environmental parameter is most out of range before optimising the rest.
Jeremy repeats this multiple times: find your weakest link (too cold garage, too hot tent), fix it, then move on to VPD optimisation.
ep 019
weave and tuck
A training technique where branches are woven through scrog screen holes and tucked under to keep the canopy even.
Jeremy mentions he could go through and weave and tuck but some plants are too straightforward to bother.
ep 020
weight check
Lifting or feeling the container to gauge moisture content before committing to a watering volume.
Jeremy recommends this alongside the 5-to-10% rule as a practical way to avoid mistakes.
ep 008
weight test (feeling the pot)
A watering decision technique where you lift the container by hand to judge moisture content — heavy means moist, light means dry.
Jeremy: 'after feeling the weight here there's definitely enough weight so I'm not going to water them'.
ep 009