The avocado tree, also known as Persea americana, grows fairly large and yields fruit in spring and fall. The fruit originated from Mexico but has been known to grow in parts of Central and South America. Avocado trees are quite hardy and simple to care for once their growing pattern is well-established. They can be grown inside but will stay smaller and will bear no fruit in those conditions. Full sunlight and fertilizer-enriched soil are needed for an avocado tree to thrive.
Fill a jar or glass with water to the top. A jar works better as it has a narrow opening that offers better support in supporting the seed above water.
Position the avocado seed on a solid surface with the pointed side of the seed up. Use the three toothpicks and insert them around the the sides of the seed, making even spaces between the toothpicks. Insert a little more than the tip of the toothpick.
Place the avocado seed in the water so half of the seed rests in the water. Set the jar in an area that receives a reasonable amount of sun but is not in direct sunlight.
Change the water bi-weekly. Allow the roots to develop for approximately two months before you transfer the seed into soil.
Transfer the seed into a large plant pot once the roots grow to five or six inches. Fill to the pot to the top with enriched planting soil to encourage growth. Make an indentation in the soil and place the seed into it. Plant the seed about one inch into the soil so the top part of the seed is visible above the soil. Pat the soil down firmly to ensure the seed is embedded snugly in the soil.
Peel off and discard the brown outer skin of the avocado seed. Fill the plant pot to the top with enriched soil.
Make an indentation in the soil. Place the avocado seed in the soil with the pointed side of the seed up. Allow the top of the seed to slightly poke out of the soil.
Pat the soil around the seed down firmly to create a tight fit for the seed in the soil. Keep the soil moist. Do not over-water. It will take several weeks for the seed to sprout.