Remove the pit. Cut into the avocado carefully, so as not to injure the pit, which is in the fruit's center. You can do this by scoring the skin/fruit about ½ an inch (1.3 cm) deep all the way around the outside, and then twisting the two halves in opposite directions to open it. Carefully remove the pit and set it aside.
Clean the pit. Wash the avocado pit gently to remove all the flesh. Use warm water and your hands, and avoid using soap. Be careful not to remove the seed cover which is light brown, as this may destroy the pit and make it less likely to grow.
Insert toothpicks into the pit. Holding the pit "narrow" (pointed) side up, stick four toothpicks into the middle section at even intervals, just enough to give a firm hold. This will allow you to balance the pit on the inside of a cup, without completely inserting it into the cup.
- The pit should sit in about 1 inch of water, so keep this in mind when inserting your toothpicks.
Fill a cup/jar with water. Add some water to a small, slender container (preferably glass) until it reaches the top rim. Your container's opening should be wide enough to accommodate the full width of the avocado pit easily; however, make sure that it is not too wide, otherwise the toothpicks will not be able to reach and the pit will fall in.
Set your avocado pit (with inserted toothpicks) on the top rim of the container. The toothpicks should sit on the rim of the container, leaving 1 inch of the pit only submerged in the water. Make sure the pointed end is up and the rounded end is in the water, otherwise your avocado will not grow.
Wait for the pit to sprout. Set the avocado-topped container in a temperate, undisturbed place — near a window or any other well-lit area to begin rooting and the growth process.
Change the water every one to two days. Do this to ensure that contaminants (i.e. mold, bacteria, fermentation, etc.) do not hinder the avocado's sprouting process. Ensure the base of the avocado always remains moist and submerged in water.
Wait patiently for the pit to sprout roots. Over the next two to three weeks, the avocado's brown outer layer will begin to dry out and wrinkle, eventually sloughing off. Soon after, the pit should begin to split open at the top and bottom. After three to four weeks, a taproot should begin to emerge at the base of the pit.
Continue to water the plant accordingly. Take care not to disturb or injure the taproot. Continue to allow the avocado pit time to establish its roots. Soon, the avocado will sprout at the top, releasing an unfolding leaf-bud that will open and begin to grow a shoot bearing leaves.
Plant the Avocado. Select a location. Avocado trees are very particular in terms of their ideal climate and growing conditions. Most of the time, avocado trees should be planted in a pot, and moved around to meet the changing weather. Avocado trees prefer a temperature of 60 – 85°F (15.6 – 29.4°C), and established trees can handle temps as low as 28°F (-2.2°C).