Is it possible to make my pecan tree stay small?

They can grow to 70 feet high and 70 feet across. You can control height somewhat by pruning but it wont remain houseplant size very long.

Yes you can graft a limb from a pecan tree. And raise it as a bush inside. This takes some skill to do. I would recommend cherry for this wonderfull blooms. But the fruit or nuts will be very small from this. A good nursery could do this for you. But your tree outside will or can be trimmed back to about semi dwarf size. It takes special grafting to turn a tree into a bush size plant for inside. By the way a pecan tree is a bush not a tree at all.

properly, at the start, pecans advance on timber no longer flowers. 2d, there's no thank you to rigidity it to stay small. They advance everywhere from 70-a hundred ft tall, so that's actual no longer everywhere close to a "bonsai".

Do a search of Bonsai.

Interesting hobby if you have the will to do it.

chain saw