Container growing on a balcony forces some compromises with sativa genetics but it can work. A twenty litre fabric pot, a strain from the shorter end of the sativa range, and topping early are the three things that make the difference between a manageable plant and a neighbour complaint. The small space suggestions on https://hazesativaseeds.com point toward a few Durban derived lines that stay under a metre and a half with basic training. Wind and privacy tend to be bigger problems than the plant size itself.
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