Avocado trees (Persea Americana) are native to Central America and thrive in tropical, wet environments. The average height for a fully mature avocado tree is 80 feet. The most common way to propagate avocado trees is through root grafting. However, home gardeners can grow avocado trees from seeds. Grafted plants yield fruit in a couple of years. Seedlings, take roughly eight years to produce fruit. Avocados grown from seeds take over a decade to yield fruit, according to the California Rare Fruit Growers Association. Although your avocado will not yield fruit, this tree makes an excellent ornamental tree and is fun for gardeners of all experience levels.
Slice a thin layer off of both ends of the avocado seed with a clean, sharp sterile knife.
Insert a toothpick into center portion of the avocado seed. The toothpick should be located on the side and not the ends of the avocado. Pick up a second toothpick. Move your hand approximately 1/3 of the way around the seed. Place the second tooth pick. Repeat with a third toothpick.
Fill a drinking glass three-fourths full with warm tap water. Balance the avocado seed on the edge of the glass with the toothpicks as supports. Make certain the larger end is in the water with the sliced layer completely immersed.
Place in a sunny window or 6 inches under an artificial plant grow light. Change water every other day to ensure proper oxygen levels for root development and germination.
Combine 2 parts sand with 1 part organic potting soil. Fill a 6-inch potting container half full with the mixture. Place the avocado seedling in the pot with the roots touching the soil. Cover the seedling, leaving the top sprout section exposed.
Water the Avocado seedling often to keep the soil moist. Place in a sunny location for six to eight hours of direct sunlight, or eight inches under an artificial plant grow light.