A large, fixed container or raised bed used inside a grow tent to house multiple plants in a shared substrate volume, as opposed to individual pots.
The 2x4 tent used a planter box (also described as a 'little raised bed') alongside the AutoPot XL pots in the 4x8. The planter box plants showed faster, more even recovery post-transplant compared to the 4x8 AutoPot pots at veg day 18.
Discussed in: Ep 001