Leaf analysis

[OlderNOTwiser]

There is a small mite issue going on with Han Solo that I'm hopeful to be at least even with and not losing ground. I took her and isolated as best I can while trying various eradication methods.

Reorganizing the tent showed a few interesting leaves on other plants. This leaf is from a bagseed spawned from last outdoor grow. Mom never got mature enough (aphids) to show her fall colors like this one seems to be doing. I've checked several times against the plant doctor photos and not really getting it. Because of the mites I'm using the loupe constantly looking for more of them. The tent was flipped on January 19 which is 6 weeks today. Throw away a week or so to begin "flower" and I'd guess I still have 4 more weeks! Anyway, I'm not too stressed but more interested. The pic doesn't do it justice really. The stems on this plant are red/purple but foliage is green. This leaf, and a few others, have what appears to be a continuation of the color into the leaf but the tips are almost purple as well as the edges. Plant is chugging along just fine so more curious than anything else. Could it be using up nitrogen and exposing the underlying color?

Edit: The leaves in question are lower on the plant so not light or heat issues. pH varies between 6.2 and 6.8 on water/nutes.

[D.A.A.S.69]

Could be a bottle short on Nitrogen, idk, but if she was mine I wouldn't be very concerned at all, being its a lower leaf, or unless it started spreading everywhere.

[TokerTom]

I dont think its about N... They tend to get yellow from the tips and inn...
... tho I belive its a phosphate issue. Anyone agree?
Do you have the ph under controll? Ph is regulating the uptake in nuts... Ph of base does it harder for the plant to obsorbe the nuts in the right way.
5,5-6,5Ph is the range where the plant absorbs nuts most effectively tho take in mind if you are growing soil, semi hydro (coco) or plain hydro.

[Jordann]

This has helped me in the past