Willow trees are fast growing, and because of that, they require a lot of water and fertilizer. They will grow and thrive planted near a body of water. If you have an area of your yard where water accumulates after a rainfall, this is the ideal place to plant your willow. The tree will even help to eliminate any standing water in the area after a rainfall, because the roots will soak it up.
Pick the site to plant your willow tree. It should be a site with rich soil and be either close to water or in a low-lying area of your yard.
Improve the soil in the planting site. Dig a hole that is twice as large as the root ball. Remove the soil and use it elsewhere in your yard. When you backfill the hole after planting the willow tree, replace the soil with a mixture of half compost and half peat moss.
Fertilize your willow tree with fertilizer spikes that are inserted into holes dug near the roots. Apply these in early spring. Every month, spray the leaves with water-soluble fertilizer to give the tree a boost. Willow trees grow quickly and need to be well-fed.
Water your willow tree with the equivalent of 2 to 3 inches of rainfall per week. Willow trees love lots of water and will grow up to 10 feet a year if they are well-watered.
Prune out dead, broken or diseased branches in early spring.