that looks to me like a magnesium deficiency. did it start on the lower part of the plant? are the growing shoots a very light green or almost white? if it is a MG deficiency you can try epson salts at a rate of 1 tablespoon per gallon of water, a faster way is to use a foliar spray but since you are into flowering now i would discourage that type of application. a low N reading is what you want at this stage of flowering, i would also discourage raising your N level.
guerrilla farmer Reviewed by guerrilla farmer on . outdoor problem w/ photo could someone check this photo and tell me whats wrong? i checked the soil with a cheap test kit. the results were very high p and k but very low n. the ph was nuteral. i was using advance nutes. heavy harvest fall. i guess i may have put too much down, as i usually use water soluable ferts, but where did all the n go? it's suposed to be 10-20-20. i put some blood meal duwn to give them some n but some of the other plants seen good besides a little yellowing of some lower leaves(classic sighn Rating: 5