I read somewhere that if you pee on your plants it gives them nitrogen. I was wondering if this was true and if any of you have tried it?
It does, but it's better to buy a product with the exact amount of nitro than peeing on your plant, 'cause your piss has varying levels.
I have occassionally used urine to supplement N. But it does contain NaCl and other salts, dilute it 10 : 1.