Quote Originally Posted by stinkyattic

Oh edit, urea and urine are not interchangeable terms. Just FYI. Urea is a specific chemical compound, while urine is a solution of several different compounds.
yeah and one of those compounds is urea : )
so when people are talking about pee for plant ferts its for the nitrogen in the urea. so in this case it is kind of interchangable.

most ferts use synthetic urea = but its still not something i would use on plants except during veg.