Originally Posted by oregon bob

See the purpling of the leaf stems... likely your P and/or K. The lighter yellow with minor ridging & curling is what my babies do when hungry for nutes & then I give it to them in one big shot. It stresses them a little. The curl will go away over the week, or at least straighten back up. Additional new growth should be fine within a few days. Just be cautious on over feeding her as this is always much more difficult to address. I feed light, keep them a little hungry, no ppm spikes and/or pH flux. Best brah... should be much better tomorrow & more so the next, but if not, repost brah!