Avocados were once referred to as sailor's butter, because sailors used the fruit in place of butter, and alligator pears, because the scaly appearance of the skin resembled that of an alligator. Some people now grow the avocado from the pit as a novelty houseplant. Although the avocado plant grown from the pit may produce fruit, it generally does not resemble those avocados sold in the market place.
Wash the avocado pit to remove any fruit residue. Do not remove the brown skin covering of the pit.
Insert four toothpicks into the middle of the avocado pit at intersecting positions. Push the toothpicks into the pit 1/2 inch deep.
Fill the glass jar to the top with water. Suspend the avocado pit on the glass jar so the bottom half of the pit it in the water. Place the jar, with the avocado pit, in a sunny location.
Fill the glass jar daily so the water level remains constant around the avocado pit. Change the water every three or four days to keep contaminates from rotting the pit.
Watch for the avocado pit to split and send out a tap root in two to six weeks, according to Purdue University. Following the rooting, the top of the avocado pit sends out an unfurled single leaf stem. Maintain the water level as the root and stem grows.
Transplant the avocado into a growing pot filled with quality potting soil once a root system has developed, instead of the single tap root. Grow the avocado under bright light and water at least once a week when the soil dries. Continue growing as desired for a beautiful house plant, or transplant outdoors in warmer climates for an avocado tree.