Glad you asked...
If you have a branch from a tree and it's big enough to be planted in the ground. You can plant the branch and water until the branch takes root in your yard.
Then again, this answer might help you...
To grow a tree from a branch, cut off a small branch that's no longer than 12 inches or so, and plant it in a flower pot, with good potting soil. Pack the soil firmly around the branch or stem, and keep the soil watered. Put the flower pot in the shade with just a little sunlight. Within a few months, you should see it start sprouting little green leaves. If not, then it's a dud, and you might need to try again. It's very difficult to grow a tree this way, however, it is possible.

