The next time you enjoy the taste of a fresh avocado, don't throw away the seed. You can start your own avocado plant from the pit. Many think of avocados as a rare, exotic fruit, but you can easily grow your own avocado plant in your home. While you may never reap any fruit from it, avocado plants make great houseplants. Growing an avocado plant is also great way to give expose children to seed harvesting and planting.
Remove your avocado seed from the fruit if you haven't already, and wash with warm water. Start the seeding process immediately. If you wish to plant your avocado seed directly into soil, move on to Step 5.
Insert four toothpicks into the avocado seed, halfway down and on all four sides.
Set the avocado seed, flat side down, into a glass of water. The toothpicks will be the brace that holds the seed up so only the bottom end is in the water. Make sure the glass is full enough to cover the bottom half of the seed.
Place the glass in a sunny window until roots develop. This can take several weeks. Be sure to monitor the water level of the glass during that time.
Fill a container with house plant potting soil mix. To avoid the need for early transplanting, plant it in a pot that is at least 10 inches wide and 10 inches deep. If you are starting your roots in water, when they are between 1/2 and an inch long, move them to the pot.
Insert the avocado seed, root side down, into the soil. Make sure that the top half of the seed is sticking out of the soil. Pack the soil around the seed, and give the soil a light watering.
Place the plant in a bright, sunny area and keep the soil moist, but not wet.
Fertilize the avocado plant with a house plant fertilizer spike, and repeat this step every three months.