I only grow 1 plant a year.(3rd season) so still newby by my standards. I have an outdoor plant that has leaves that are looking rusty. Did I over nute them? Would pics help to nail down my problem? Any help would be appreciated.
You might off over feed them but no real indication of quantity of nutrients or what type have been used per gallon of water, so its any bodys guess...
On the other hand looks like a def mainly P-phosphorus.