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ok so about a week and a half ago my plants started to yellow from the bottom up. leaf veins are left light green or yellow, and leaves are not dropping off. they are just yellowing up and wilting down and thats it. i thought it was the plant naturally moving nutrients toward the upper portion...

ok so this is my second grow. i start seedlings under 18-24hrs of 4ft tube lights, nothing special. grew both till they were around 18-24in. during this time the only "pruning" i did was take off fan leaves. then took em to the grow room and changed the lighting to 12/12. and upped the light to...