Washingtonia filifera

Washingtonia filiferaCalifornia Fan Palm

Tree

The California Fan Palm is a large-scale tree with a wide, heavy trunk. Very slow-growing to 20 to 40 feet. The crown can spread to 15 feet. Old leaves drop to trunk and from a tick thatch.

Temperature

Hardy to about 15 to 18F. Young plants are more susceptible to cold. Slow to recover from frost damage.

Water requirements

Moderate to occasional, but reseeds rapidly in a constantly wet situation.

Sun

Part to full sun.

Soil

Tolerant of saline and alkaline soils. Fastest grown in moist soil.

Maintenance

Periodic grooming.

Disadvantages

Occasionally gets bud rot, which is almost impossible to diagnose until it is too late. Slow to develop. Trunks are occasionally infected with a rot near the base or a borer that can damage and kill drought-stressed trees. Tall plants are expensive to groom. Dry thatch can be a fire hazard. Tres recover from fire but will always have a blackened trunk.

Bloom

Long blossoms like streamers emerge from crown in summer and produce abundant small white flowers.

Fruit or Seeds

Blue-black fruit appears on female trees.

Uses

Too large for the average residence. Boulevards, parks and public spaces. Groves are impressive and dramatic. Rows make walls in landscape. Tiny young plants in containers stay small for a long period.

Origin

Native of the Southwest. Member of the Arecaceae (Palmae) family.

Cultivars

There are two strains of this palm: The California arid climate type retains its leaves all the way down the trunk unless they are removed. The Arizona stands are sometimes self-pruning and can drop old drying leaves.

Themes

Desert Transitional, Subtropical.

Return to Index