hello everyone im growing in coco can someone please help me and tell me what this is im lead to believe it is cal mag deficiency but a second opinion would be great thanks in advance
I'm using the canna brand nutes a and b im using a litre of water with nutes e.c of 0.7 im using a 250w hps about 12inches away from tops of the plant im feeding daily
I'm not familiar with the canna a/b, but IMO if you have a true 250w HPS at 12 inches them
being that small probably a little light burn place you hand over them about 2 inches above
them and see if you feel the heat from the light, if you do its to close...