Leafs turning purple

[Franzkafka]

Leafs turning dark and purple plant looks fine otherwise 1 month old clone no nuts so far. Your thoughts pls. PH and temp are regulated

[Cannabliss]

Could be a number of things. Some strains naturally turn some of their leaves purple due to their genetics. Or it could also be lacking a bit of Phosphorus. Cold temperatures can also play a part in leaves turning purple.

[Sheesh]

First thing I noticed is the plant canopy seems much wider than the pot. But, that may be the camera angle. What size pot is it? If it's way smaller than the plant (which it appears to be), you may be root bound. Roots issues cause all kinds of symptoms.

[Franzkafka]

1 gallon I am about to transplant it soon but the canopy is little wider than the pot. I haven't put any nuts yet so it might be P def. The strain is do si do cookies from what I have seen it shouldn't be purple in veg at least so it is a problem.
thanks for the replys.

[Franzkafka]

And it's not the temperature I am sure. The temp varies between 75 and 81

[D.A.A.S.69]

Could be genes, could be heat stress, I'm thinking root problems, from to small a pot. .