Fisixanswered grow question 7 months ago Hi,
I got one tent 120x60 with 3 buckts of 20L and that is a tight fit, specially in Flower.
So I would go 3 or maybe 4 but that would be max in my opinion. It may also depend if you wanna go from seed or clone. You could do more with cloning or other techniques.
Hope this helps.