Avocado is a small tree that produces a fatty, delicious fruit. The tree enjoys a warm climate and will not grow outdoors in America except in warmer regions such as Florida and California. According to Texas A & M University, avocado trees do not come true from seed, at least not from the seeds found in the avocados found at the supermarket. If a true avocado seed is found, the seed may be germinated and planted. Seedlings take 10 to 15 years to produce fruit.
Fill a large container with potting soil and plant the seed so that the narrow end points up and pokes 1 inch out of the soil.
Water the soil daily to keep the soil moist but not soaking wet.
Place the pot near a window with indirect sunlight once the seed has begun to sprout a seedling, says the University of Nebraska-Lincoln.
Fertilize the avocado plant every three months using a standard, slow-release houseplant fertilizer.
Keep the avocado plant away from cold, drafty windows during the winter. Any branches freeze-damaged require pruning.