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'Haas' Avocado, photo courtesy of Kimberley Navabpour
'Haas' Avocado, photo courtesy of Kimberley Navabpour

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Zone
Zones 16, 17, 19-24
Full Sun
Full
Regular Water
Moderate

Avocado 'Hass'

Lauraceae
Evergreen, Edible fruit, Trees

AVOCADO

In California, two races of avocados are grown: Guatemalan (Persea americana guatemalensis)and Mexican (P. a. drymifolia). Widely planted varieties ‘Hass’ and ‘Fuerte’ are hybrids. Ideal climates for Guatemalanvarieties, which are generallyhardy to 30°F (–1°C), are Zones21, 23, and 24, but good resultscan be had in Zones 19, 20, and 22, and some success can be expected in Zones 9 and 15.Mexican varieties, which bearsmaller, less attractive fruit, arehardy down to at least 24°F(–4°C); they grow in Zones 9, 15–24, and some warmer locations in Zones 8 and 14. Avocados bloom in late winter to late spring, so eventhough older trees will survivethese lows, temperatures muchbelow freezing will damage flowers or fruit. In Hawaii, Guatemalan and hybrid varieties are bestadapted to (and are grownthroughout) Zone H2, but awayfrom exposure to salt spray.

Avocado varieties have flowerscategorized as either type Aor type B, depending on thetime of day they open and when pollen is released. Where avocados are common, isolated trees may produce enough fruit for home use, but for best production, plant one of each type or graft a limb of one type into a bearing tree of the other type. Mexicanavocados mature 6 to 8 monthsafter flowering; Guatemalan avocados mature in 12 to 18months. Most varieties grow30–40 ft. tall and spread wider(size can be controlled by pruning). They also produce dense shade and shed leaves throughout the year. Unless otherwise noted, the avocados listed here have thin, smooth skin.

Avocado 'Hass'

Harvest springinto fall. Medium to large; dark purple, pebbly, thickbut pliable skin. Excellent flavor. Hybrid. Hardy to 30°F (–1°C). Large, spreadingtree. Bears heavier in alternate years. Type Aflower. ‘Lamb Hass’ is more productive.

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