leaves turning purple on top canopy

I transplanted about a week ago to some different soil thinking it was soil PH. I'm using about 50/50 mix of topsoil and peat moss with perlite. I feed GH FLORA TRIO. Temps are 63-75 degrees, RH 47-63. I have them in 7 gallon smart pots. Issue didnt pop up untill i transplant into these smart pots so i tried to transplant again using some differnt brand soil and peat but issue has not stopped. I'm about 3 months into veg and I can't flip to flower because I cannot figure this issue out. It's been going on for about a month now. I added a few tsp lime in each pot about 2 days ago
 

mmjmon

Well-Known Member
What strain is it?

If its not a blue/purple cross then maby cold temps in grow room!

I transplanted about a week ago to some different soil thinking it was soil PH. I'm using about 50/50 mix of topsoil and peat moss with perlite. I feed GH FLORA TRIO. Temps are 63-75 degrees, RH 47-63. I have them in 7 gallon smart pots. Issue didnt pop up untill i transplant into these smart pots so i tried to transplant again using some differnt brand soil and peat but issue has not stopped. I'm about 3 months into veg and I can't flip to flower because I cannot figure this issue out. It's been going on for about a month now. I added a few tsp lime in each pot about 2 days ago
 

Big Perm

Well-Known Member
Is it purple under a white light? It looks purple under the purple light. I looks like nute burn to me.
 
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