There is a general rule that you need 1 part Mg (magnesium) to 3 parts calcium. What are the npk's of what you are using? How much of each how often. Are your tips burned crispy?
Karmaxu Reviewed by Karmaxu on . Brown Spots Leaves Curling Upwards??? Help Me ??? OK this is whats going on, I have plants all in different stages of growth and there all showing the same signs of a problem. Some of them the leaves are twisted and contorting. Also I have some that are curling upwards all around the edges, and with brownish spots with some leaf yellowing. I thought at first it was nute lock, leached soil and no changes. I am using a 250w hps mh interchangable light 16/8 day night, 50 percent RH and 65-75 degress. I am staring to believe that it is my water Rating: 5