How much room does a plant need? In a closet situation, how many square feet does each plant need?

Marijuana plants can be forced to flower any time by placing them on a 12/12 light/dark regimen. They can be flowered when they are small and have six inch spacing, four per square foot, or when they are larger with one plant in a 3 foot circle. The smaller plants spend much less time in vegetative stage than the larger ones.