I have 6 plants - 3 x 6 weeks and 3 x 4 weeks.(at back of grow area in pictures)
Been feeding every 2nd feed which is around 2-3 days. as I am a first timer I have never checked EC but bought me a tester and found horrible EC values when I flushed the plants. range 2-5 3.3 I flushed twice on all 3 plants that are 6 weeks in and overnight suddenly all leaves seems taco dark green and the tips pointed down at 90 degrees. i used to have 1 x 120W led panel and have swapped out to 600W HPS light. the curling started before the changed in lights … i have the lights fairly high from canopy around 30". and he 3 younger plants do not show curling and seem happy.
I read the EC values are not what they should be ,
growing in perlite soil in 7 lire pots
temps are high around 29 during day and 27 at night.
think need to add AC
not sure what to do … wait and let the 3 with the claw dry out and start nuts again ?