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It's not a problem mate! It's genetic 👌

Lucky you,,, you got aPurple pheno... the purple will spread and even you flowers will be purple too. Thats nice and nothing to worry

Definitely due to large difference between day time and night time temps! Though no harm is done to your plants and it isn't a sign of any kind of deficiency or toxicity... look to have a couple weeks added to your flowering time due to the extreme temperature flux. It will surely slow down ur growth.

Due to temperature differences around 10°C from day to colder nights some plants start to change their colour to purple. The green pigments break down and opens the way for the lilac anthocyanin to come thru. It is normally hidden by the pigments of the chlorophyll. This is just a way for plants to cope with lower temperatures while maintaining the best rate of photosynthesis (like trees do when autumn arrives). Happy growing! 🌿😊✌️

It’s just a rare phenotype you got lucky probably 1/1000 I bet or something like vitiligo

Just a genotype of whatever strain you have! Way to be diligent, looking forward to seeing your harvest! Happy growin'y'all! ✌️🌱🌲😎💨

Hey brother most of time this is straight up genetics that is defenitely some sweet looking leaves . The other would be that anything under 60 degrees can bring out the purple in certain strains not all of them ..your girls look very healthy so I would say that it is the genetics ,did the buds you got seed from have purple or can u find out if the grower I know that ain't easy can tell you if the purple is normal from the strain might be a long shot..cheer from Canada ..

Hey there are 2 things that can cause the purple. The first is your strain might have some purple in the genetics. The other is cold weather at night below 60f can cause phosphorous lock out at the roots which will make the leaves turn purple. I have had a few sativas that run late into the cold season that developed purple from lockout but yours look brighter purple so I would think it is most likey genetics. Good luck with them