It's an excellent N source.
Urinating directly into your plant containers will burn your plants. Urine is very potent as a fertilizer. Use it @ 1 TBSP per gallon of water, for a nice low dose.
It doesnt store well tho, mix what you need and get rid of the extra.
Most of the growers I know now, havent bought a Grow fert in years, Bloom only.
It works great in hydro to. I use it, and encourage the gardens I've helped set up, to lose the misconceptions, and use this excellent free fert.