No nutes!!!

I've been growing 6 plants from seed every since the 29th of april. The thing is, I haven't been using any nutes at all. Now a few of my leaves on different plants are turning yellow. I can't afford the nutes right now because of some issues I've been going through. Can't I use baby piss for fert? Or should it be grown up piss? Besides the yellowing leaves, they look fine. Any suggestions/help/replies are greatly appreciated.

baby piss vs grown up piss... Hmm I dont know

you have to dilute 1/10th piss with a gallon OR 2 of water.

WARNING

It will smell like PISS
but it's all good
use your own.. not a babies lol
hope this sorta helps