Evergreen trees keep their foliage year-round and are prized for providing green color to the landscape over the winter months. Evergreen trees are often planted in groups or rows to form hedges, privacy screens or windbreaks. Several types of evergreen trees are available for sale. When selecting an evergreen tree, take into account its mature height and spread. While some are compact and ideal for hedging and smaller landscapes, others can grow quite tall and wide. If you want privacy in a hurry, select a fast-growing tree. Other factors to consider are hardiness zone, growth rate, sunlight and soil requirements, and maintenance needs.