ive posted a major problem i have been having not much help so far (my fault not explaining well) but can anyone tell me if lack of nitrogen or lack of (phosphorous during flowering)cause a plant to lock out minerals such as ma,mg,iron,cal Im asking because i over fed one plant 5 weeks ago(at end of veg with veg food) as an experiement (burnt all edges of all fan leaves)and all other plants in grow 2nd week in 12/12 got severe nute lockout ma or mg not sure(looked like measles on all fan leaves)after a few weeks they were in such bad shape i had to kill all them off except the one i experiemented with and over fed she done very very well loaded with bud same ph levels on all even the one that did very well thanks for feedback