If the tree is structurally sound, staking should not be necessary. Studies have shown that trees will get established faster and have a more stable trunk if they are not staked. However, if you have a tall or large tree with a fairly small root system, or live in an area with high winds, or have trees that have suffered storm damage, occasionally staking is needed. If staking is needed, use two or three stakes used with a flexible tie material. You want to allow some natural movement, so don't stake too tightly. Any ties that are in contact with the tree should be flexible, or wrapped in a piece of hose tubing. You don't want to cut or wound the trunk of your tree with the support. Remove any staking and ties after the first year of growth.
Trees provide us with shade-a much cherished commodity in the summer. With proper planting, they will establish themselves quickly, and begin a long and prosperous life. If you need new trees in your landscape, now is a wonderful time to plant.