It depends. If its cold outside and the plant starts to chill, it may occur Some plants have purple genetics.
with some strains, yes, totally normal, sativas if cooler climates will often go purple. posta pic if you have one
I dont have a picture at the moment, I was just wondering because i have eight plants and 6 of them are turning purple, they are all treated the same and they are all inside. The temp. in the house is usually around 72-74 degrees so i dont think thats too cold b/c there supposed to be in temps between 70-75 right? They were grown all at the same time, all pretty much a month old.
youre fine, if you notice your leaves dying off...nother story. for some its genetics, come to think of it, my sativa has reddish-purplish stems
I remember when my plants started turning purple but then I realized it was normal, the leaf stems turned purple and the veins did and the stalk did so I guess its coo and besides it makes the plant alot more tropical and pretty looking lol