I grow hydro in a 4x4 with SF4000 lighting. My last grow I grew a Blackjack along with other strains in scrog. They all grew well and produced excellent bud, except Blackjack. It produced excellent bud, just not much of it. The plant never seemed to take off growing and never got too big. In another grow now, Blackjack is lagging behind the other strains. Is there a trick to growing this strain. Does it need a specific ph or something? Thanks.
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