Tried louping under the leaves and couldn’t see anything… thinking maybe calcium / magnesium or possibly overwatering. These plants are aways away from my home so I can’t tend to them daily.
They’re in 7 gallons of organic soil, with buildaflower top dressing and rain water under a 500w cmh. Temp 80 degrees, rh 50%.
Any ideas?
Looks like excess n, can’t be sure though…
Rainwater is practically empty of Calcium and Micros
I’d have to agree with @leetdood about the N.
There could definitely be other things as well.
Do you pH water?
I haven’t been ph’ing water, no. I can double check to see if it’s something crazy, but last I checked the rainwater was 7.0
Maybe it’s the start of a Potassium deficiency, blocked by too much Nitrogen… 
So… checked out the water ph from the rain barrel I’ve been using. Chillin at a cool 5.0 … 
no wonder. There was an accumulation of pine needles in the guttering so it turned the barrel into an acid bath basically.
Fixed that up, so gunna ride it out the last few weeks… thanks for all the answers everyone!
And/or too much phosphorus…
