BigBun
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4L. 1 gallon? Roots filling the container? I've noticed when I grow smaller plants the roots only get so big,soooo I'm trying for small plants and small pots but 20 plants in one tray.hmmmmmmm...
Yes, a gallon is about 3,8l if i remember right.
Roots should easily fill the container because canabis is a deep rooting plant.