This is probably a long shot but I figured I might as well ask :) Taken today in Phoenix, AZ. Bought this whole pot from someone across the street a few months ago and they have since moved so I cannot ask them. This popped up about 3 weeks ago.
Well the leaf looks very much like a leaflet of cannabis, but by now I would expect compound leaves to be forming on that. Might need a bit more growth before it can be ID'd. Maybe something like an elm seedling.
Thank you for your reply! I will definitely keep waiting around and give an update once it grows a bit more. I think one of our neighbors has a chinese elm though, so we'll see! I'll be back :D Thank you again!