The cost of tree planting in Saint Helens depends on several factors such as the location where you want to plant it, the kind of tree, your geographical location, labor, and other associated costs. There are different kinds of trees that you can plant in your yard. These trees vary in sizes and price. Some of the most common are dogwood, eastern white pine, ginkgo, Japanese red maple, Kanzan cherry, and little gem magnolia. Dogwood can grow up to 4 to 6 feet and costs around $150 to $200. Eastern white pine can grow up to 5 feet to 12 feet and costs approximately $60 for a 5 feet size and $150 for a 12 feet size. Ginkgo can be purchased for $100 for a 4 feet tree. Japanese red maple is estimated to be around $150 to $175 for a 5 feet tree. Kanzan cherry can be purchased at $150 per 15-gallon container. The little gem magnolia can grow from 5 feet to 12 feet and can cost you around $400 to $500.