You doing pots or beds? My GH is 7ftw x 7ftT x 20ftL and I have 30 plants in 30 gal pots. I vegged clones for about 4 or 5 weeks and flipped them. They more than doubled in size and the GH is full lol12' W X 24' L X 10' H..full sun and excellent soil...... how many plants? not auto's.
I would say no more than 4, full sun good soil =huge plants.12' W X 24' L X 10' H..full sun and excellent soil...... how many plants? not auto's.
my greenhouse is 24 x 48 and all i would put is 8 big plants gets to fullI would say no more than 4, full sun good soil =huge plants.
Think of an 8x8 footprint per plant, crowding in a GH creates problems.