The Hass avocado has dark green-colored, bumpy skin which becomes a dark purplish-black when ripe. Hass is the most commercially popular avocado in the world. It was first grown by a Southern California amateur horticulturalist Rudolph Hass who named it.The fruit is great tasting, good size and shelf-life, and high yields in some areas. 95% of the California Avocado crop!
In Los Angeles and the San Fernando Valley California, young hass avocado’s tree’s leaves can be damaged by the summer full sun. So plant them where they will receive morning Sun and afternoon Shade to protect from sun damage. Protect from cold winds in the winter. Near freezing temperature’s that can occur during winter nights can also damage the Hass avocado tree causing leaves to blacked and dry. Hass avocado does great by the coast in areas such as Malibu, Ventura, Santa Barbara, and San Diego where the ocean regulates the temperature.
Hass Avocado trees are also grown in areas such as Glendale, Burbank, Pasadena, Sherman Oaks, Encino, Tarzana, Reseda, Woodland Hills, West Hills, Calabasas, Agoura, Thousand Oaks, but their microclimate should be considered.
Medium to large tropical evergreen with large green to dark green leaves, and white flowers grouped in inflorescences (1-2million flowers on a tree).The same flower will open as both female and male at different times of the day depending if Type A or Type B cultivar. Avocados can self-fertilize depending on temperature, but most plant Type A (Hass) and Type B (Fuerte) to ensure cross pollination.
70% of the root system is in the first 2ft of the soil. Alternate bearing tree (large crop one year small crop next year). Mature fruit are dull and hanging on tree. Fruit ripen once picked.
The larger the space the bigger the tree. Average height is between 30 and 40 ft, some getting up to 80ft. If planting in a location with high winds, plant near a wind break. To avoid sunburn on fruit, plant where tree will receive morning sun and afternoon shade. Ideally, plant in well drained soils with moderate temperatures. Newly planted trees need to be irrigated on average twice a week to establish a strong root system.
Pruning can be done in winter to maintain shape and size of the tree. Trim so that skirt of the tree does not touch the ground. Irrigate and maintain moist soil making sure to keep tree trunk dry. Fertilize with nitrogen throughout the year in small doses. Keep area atop roots well mulched, ideally with natural leaf littler and/or organic chunky mulch.
KEEP AN EYE OUT
With such a shallow root system digging about 6- 8 inches in the soil and examining feeder roots is the best way to ensure your tree remains healthy. Healthy roots should be white, while brown or yellow roots indicate stress of various forms. Stresses could be under-irrigation, nutrient deficiencies, and certain diseases like avocado root rot.