Brown spots and Curly leaves!

[Knightsmoke]

I noticed my mom's have developed brown spots and curly leaves. No bugs.
I read somewhere that this might be a magnesium deficiency. Advice was to add one tblspoon of epson salts to one gallon of water. It has been rather hot lately too.

Any thoughts?

 

[JJ Bones]

True it could possibly be a magnesium deficiency, I honestly don't know if the salts to water works, maybe another member does.

I would recommend getting Cal-Mag of some sort and feeding via foliar spray.