purpz

awesome plant man. some purple strains don't always purple. unless it purps up quick, you got a green pheno.
 
Not all strains turn purple. I've seen Grandaddy Purple turn pure green. Same thing for Purple Urkel, and Grape Ape. It's the luck of the draw man. That's why breeders recommend you grow 5/10 seeds or even 10/10 seeds to find the pheno you want (aka the purple coloring). And yes, you can turn strains purple when you put them in cool temps. Purple is cannabis's natural color. Cannabis only turn's green because the chlorophyll takes over because that's what they use for photosynthesis. Genetically speaking though, you have to find the right pheno.
 
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