Evergreen trees are prized for providing year-round color in the landscape. These trees keep their foliage over winter. Evergreen trees can be grown in rows or groups to form hedges, windbreaks and privacy screens. Farmer Seed and Nursery offers several types of evergreen trees for sale. When choosing evergreen trees to buy online, make sure they are suitable for your hardiness zone. Also, consider their mature height and spread. This is especially important when spacing them for hedging. Some can grow quite large and may not be suitable for smaller lawns. Other factors to consider are their growth rate, sunlight requirements, soil requirements, water needs and maintenance needs, including pruning.