the light is a 600w sodium with a air cooled hood and is about 18 inches away. its not the heat as it is kept at 75 or below. i feed them sensi 3 part nutes. if you over feed will they allways look burnt cos these dont so thats why i think its a defiency of some kind.
steve.442 Reviewed by steve.442 on . yellowing my friends plants are yellowing. it is the big fan leaves and its spreading from the bottom up. he grows in a nft tank. i dont see any burnt patches on any leaves so i dont think its over feeding, im no expert but i think it sounds like a nitrogen defieciency. he has done the same as in other grows with the strenth of feed so it is a bit baffleing. any ideas... Rating: 5