California avocado seeds grow well for a few weeks in a glass of water. Eventually, the small tree withers away and dies because there is not enough nutrition in the water to sustain the plant. A better plan is to sprout the seed in a small pot of soil and transplant it into the landscape later.
Offspring from hybrid plants, such as a California avocado, do not have the same flavor and growing characteristics of the original plant. Additionally, California avocado trees grown from seed often take at least seven to 10 years to fruit, and they may never produce fruit. Grow the trees for their beauty and value to the landscape.
Fill a 6-inch container with moist potting mix.
Plant the seed as soon as possible after harvesting. Remove the seed from the fruit and place it in the soil so that the pointed tip of the seed is just visible above the soil line.
Water the soil and keep it moist, but not wet. Place the pot in a sunny window.
Fertilize with a water-soluble plant food once the tree is about 6 inches tall. Continue fertilizing every two to three weeks until the tree is planted in the landscape.
Prune off the top of the tree to develop a stronger branching tree once the tree reaches 12 inches in height. Once the tree regains its height, move the tree into a 10-to-12 inch container.
Harden off the tree before planting it in the landscape in the spring. Place the tree outside for a few hours, increasing the time daily.
Prepare a site in the landscape for the tree by removing all grass and weeds from the area. Dig a hole large enough to accommodate the root ball. Plant the tree in the hole and water in.
Water the tree daily for the first two weeks after transplanting. Gradually increase the time between watering, allowing the top soil to dry out.