Need some help with leaf color

[PaulNewtoGrowing]

Hi there I was examining my plants this AM and noticed most of the tops on one plant has leaves that are turning a strange color - is this a sign of stress or a nutrient issue ? Since it warmed up a bit I stopped heating the space at night and it goes from 75 down to 61 vs 65 when heated for the last several nights - as far as nutrients go it’s in an organic mix I made and I only add a bit of Calmag. Once a week.

 

[SoOrbudgal]

Normal leaf strain progression

 

[Catfish22]

Cold temp maybe, what is the strain?

 

[PaulNewtoGrowing]

It’s a Citrus Farmer and will be at 7 weeks in a few days

 

[PaulNewtoGrowing]

Normal leaf strain progression

Damn looks like you are correct - a friend just sent me this picture of same strain he found on web.

 

[PLreef]

Looks pretty normal. Damn pretty too.