quick growing plant

[roseycheeks]

Does ANYONE know what kind of seedling this is? It was dug up under a trumpet vine tree, so I am leaning towards it. It sure is growing fast, the neighbor gave me permission to dig up any seedlings I wanted since they moved somewhere else, so I thought if it was I would try to keep it under control by keeping it in a container.

[roseycheeks]

I dug up this seedling over at my neighbor's house(with their permission!) It was under a trumpet vine bush that was against the fence. Can someone tell me if it is a seedling and if it is possible to grow it in the container. If I can I will be able to control it and possibly have a single flower, take it outside and maybe get a hummingbird to eat out of it while I am sitting next to it or holding it.