Some cuttings are showing this yellowing down 650W of LED Samsung lmb301h and osram 660nm... I lowered the dimmer to 480W. Same cuts under sodium grows well... So i'm sure it's due to LED liht what do u think?
Also the green is lighter down the LED light...
Cuttings are critical bilbo and cheese uk, both clone only, using coco coir no PH or EC issues.
had the same issue when I switched to led. Was using coco. Per @Aqua Man advice I upped the ec and started watering twice a day instead of every other day. A week later they looked amazing and never had this problem again.