i have these plants in hempy buckets what could cause this to happen to them i am using 3 parts gen. hydroponics .As u can see I'm flushing them know in the bathtub I'm guessing its some sort of deficiency my nutrient strength is around 500ppms and my ph is at 6. so i don't know what to think it could be
Bugs, or water burn; be careful when you water your plants with nutes; the salts will burn the leaves and the light will magnify and might burn too. Are leaf tips yellow all over the plant?