The girls have been flowering for 5 weeks and the past week leaves have been turning yellow on the viens, they are turning brown and getting brittle. Im not sure what the problem is. Im using a 400watt hps, growing in soil, temps are between 71-78 and humidity 48-55%. I thought is was an over fertilization problem but i have been giving them plain water but the problem seems to be getting worse and speading. Could it be a magnesium deficiency? any help would be great. thanks
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