Serrated edges on leaves curling up

I’ve been noticing leaves on different parts of the plant the serrated edges are curling up towards the stem. It’s doing it at different heights from 24 36 inch away from the lights yes. The plant is very healthy-looking they are in fabric bags with Happy Frog and get watered with 6.4

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Too much nutes…notice the crinkled leaves? That happens before it curls over.
Canoeing. Might do a lite flush to lower ph as well.
Check runoff for ph levels. Sample the middle of the runoff stream.

Not a major prob…but…needs to be corrected. It will do fine.

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It is possible but canoe’ing can be from over watering or too high an ambient temperature as well.

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Temperature never goes above 75 and I never feed them more than 500 parts per million every 5 days

Stems are purple to i agree with nute problems

Are the edges crispy or still flexible? How’s your humidity?

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no they’re not crispy and my humidity ranges anywhere from 35% to 55%