Willows trees are some of the easiest plants to root. In fact, you can actually grow a new tree by simply taking a stem and sticking it in moist soil. It’s the hormones in willows that cause such rapid rooting.  

Willows require a lot of water, so be sure the location you choose will get plenty of water

 You should be able to transplant it to a well-prepared planting site after the weather has warmed and there is no danger of frost. It may still need a little shade for a few weeks but should soon establish and begin growing.  Be sure not to plant it within 100 feet of a building or near a sewer line.  The roots have a big spread and thirst for water.