A group of beneficial predator beetles (Staphylinidae) that hunt soil pests and can climb plants hunting thrips and other insects.
Jeremy says the compost already contains them so he's not applying them separately this round; the 'triple pack' from Evergreen Growers would include them.
Discussed in: Ep 006 · Ep 007 · Ep 017 · Ep 018 · Ep 019 · Ep 020