epsom salt is used when you have a mag deficency... if you have nute burn you need to flush you girl. a lil more info on your grow would help stay high
Coco is notorious for this, the picture looks like the plant is suffering from nute burn and Mg deficiency too. Does Mg deficiency usually just devour a single leaf like that? I thought it would be visible on many leaves
Mg is readily absorbed through the leaves. A mix of 1 tsp/gal water Epsom salts can be sprayed directly to the leaves. In veg only though. It's the fastest way to get Mg to the plant. Dollo lime also adds mag. and I use it as a drench or sprinkle a tsp on top of the soil sometimes. It never burns. Me that is.