BIGBUD!!! huge yeild and u can prevent any plant from getting big by vegging it for a shorter period say 2 weeks. The veg cycle makes ur plant tall or short. regardless strains do have there sizes but u should be fine with any strain by vegging it for 2 weeks. try lookin for bushy strains pretty sure the bigbud is one of them. Indica is the way to roll if u want to keep it small. Search seed sites for indica's and find the most potent one i guess. they should give u other info on flower periods to. the shorter ur grow period im pretty sure the smaller ur plant will be.