Purple Leaves

As I grow in the greenhouse most of my plants have had stems on fan leaves turn purple when it starts to get colder, even a little on the leaves, but 1 of my plants is turning extremly purple from the bottom upto about halfway up the plant but it is spreading up there. I have 3 plants in there the same as this one and its not happening to any of the others?


I think there some type of haze but not sure which (bag seed)

If its happening to one and not the others I would say its the strain. but if theyre all the same strain maybe one just has more purple traits than the others.

ya doesnt look bad i love when they turn purple makes em look deliecious lol