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eastcoastled
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Temps will only make a purple strain more purple, but it has to be in the genetics in the first place.You drop your temps at the end to make em go so purple or they just go on their own? My friends running few different phenos of GM he's dropping temps way low and everything else in the room purple as hell cept the GMs. Everything looks phenomenal btw:D
here is GM run in the winter with 55 degree nights.
here is a clone of that plant run in the summer with 70 degree nights
the gg4 dom pheno will not turn purple no matter what, it stays green in the same conditions.