Avocados are a popular fruit in the United States for making guacamole and many other dips and recipes. The trees are hardy in USDA planting zones 9 through 11, however 90 percent of all avocados grown in the United State come from California. There are many varieties of avocados; the Haas cultivar is the most popular and found in many grocery stores. You can grow an avocado tree from the seed of the fruit that you eat, but it will probably never produce fruit. Another option is to purchase a grafted tree from your local nursery.
Choose a location that has full sun and is about 20 feet away from other trees or shrubs. The roots from the tree will eventually choke out other plants. The location should be high enough that water does not pool at the base of the tree. Plan planting for spring.
Dig a hole twice the diameter and the same depth as the root ball. Mix the dug-out soil with one part sand and one part leaf mold. The soil should be a loose and well draining after mixing. Create a small mound at the bottom of the planting hole.
Spread the roots out and drape them over the mound. Fill halfway up the root ball with the amended soil and water well. Continue to fill the hole until the soil is level with the surrounding ground. Hand tamp down well.
Water the tree completely immediately after planting and every other day for two weeks to establish the roots. Afterward, water only when the top of the soil starts to dry out. During the winter the tree will only need water if you experience a very dry spell in the weather.
Begin to apply a balanced fertilizer one year after planting at the beginning of each season. Follow manufacturer's directions on the amount to apply.
Provide frost protection for young trees. Each cultivar is different as to the lowest temperature it can handle. Use a frost blanket when the trees are small, and place a light bulb under the blanket to keep the trees warm. Garden centers also sell foam that wraps around the trunk for further protection.