A container like the EarthBox that holds a water reservoir under a tray of soil, allowing moisture to wick up through the root zone while the grower waters only through a fill tube.
Jeremy calls the EarthBox a powerhouse because deep water roots drink pure water while feeder roots at the top eat the compost and organic amendments, and the wicking takes the hardest part of gardening out of the grower's hands.
Discussed in: Ep 001