Vice_1answered grow question 7y ago Hi Myrcella, 11 to 20 liters are fine (better 20). 250 watts for the growing space is excellent power; in this space, 1, 2, or 4 plants will always produce the same amount of buds, so definitely better 1 👍 I hope I helped you, best regards, may the green assist us. 👋👋👋👋