For best results (and to take the guesswork out of growing), we've taken hardy avocado rootstock and grafted it onto a cutting from a mature avocado tree, proven to produce delicious fruit. We've done all the work in our process, which results in robust avocado growth. Outdoors, this fruit-bearing tree will reach heights of 15 to 20 feet and a width of 5 to 8 feet at full maturity. But when it's container-grown, it will reach a height between 5 to 7 feet, allowing easy harvesting.
Planting: Although partial sun will suffice, to produce avocados in abundance, make sure you choose a planting area that gives your Hass Avocado Tree full sun. Spacing with the Hass is important as well. Give your avocado tree about 15 feet of space from other trees and plants.
The best months for planting are typically March through June, depending on where you live. Dig a hole twice as large as the tree's root system, carefully plant the tree and cover the roots. Tamp the soil down around the tree's root system to remove all air pockets. Using a small diameter wooden pole, stake the tree with a garden stake and tie the tree to the pole loosely using cotton twine.
Watering: When planting, water your young avocado tree to be sure it is sufficiently hydrated. Otherwise allow the soil to dry between waterings. A thorough watering once weekly is generally all your avocado needs, however.
Pruning: Prune the Haas avocado lightly to maintain appearance or to remove damaged branches during the first few years after planting. Pruning should be done in the spring.
Fertilizing: Fertilize the Hass Avocado tree in the spring, summer, fall and winter, after the tree has been planted for one year using a well-balanced fertilizer.