Avocado trees grow best in areas around the country with no frost threat. The evergreen tree can grow to heights of 30 feet or more. The fruit from the avocado is mainly used in Mexican food dishes. Avocado seedlings for planting do not come from true seeds, rather from cuttings of a parent tree. While the seeds can produce a small tree seedling, the fruit from that seedling may not be true to form. In other words, cross-pollination of the fruit occurs like most fruit-bearing trees. Plant only grafted avocado tree seedlings for best results.
Remove the sod from the planting area in a 3- to 10-foot diameter ring prior to digging the transplant hole. The grass sod will compete for nutrients and water with the avocado tree.
Dig the transplant hole for the avocado seedling three to four times the diameter of the container and three times as deep. The roots of the avocado seedling require loose soil so it can quickly take root in the new site.
Backfill the hole with the native soil from the freshly dug hole. Remove the seedling from the container. Place the seedling into the new hole.
Align the topsoil line of the seedling with the soil line of the transplant hole. Fill in around the avocado root ball with the native soil. Tamp down the soil gently with your hands.
Water in the new transplant to remove any air next to the roots of the avocado seedling. Keep the seedling moist by watering every other day for the first week. Water once or twice a week for the next couple of months.
Fertilize the new seedling every other month for the first year of growth. Add ¼ pound of 6-6-6 around the new seedling. Water the fertilizer into the soil.