meat or fish for phosphate and nitrogen fert?

i read online that meat and bone meal is good for plants in general, not pot plants specifically.

should i grind up some steak and dig it in with my plant?

i have no source of phosphates, nitrogen, or CO2 for that matter.

i just took an abandoned pot and planted the seed, basically.

Heh, I think this was discussed recently on a different thread. Don't ruin a perfectly good steak that way. Eat the steak. Your plant will not be able to break that down and get what it needs. It will turn into a rotting, vile smelling disaster. That's too bad you don't have the ability to purchase stuff online, or from your local hardware store. No manure or fertilizer or anything where you're from?

Good luck either way.