Seasonal tree planting jobs involve working on reforestation and tree planting projects. You may also handle planting responsibilities for landscaping companies. In these temporary, seasonal positions, you typically work during the spring and summer planting season. Your duties include transporting trees to the planting site, preparing the site for planting by digging a hole manually or by machine, planting the tree, and adding soil and supports if necessary. After you plant the tree, you may be responsible for watering, care, and removal of unwanted vegetation until the tree can grow on its own.