Washingtonia Robusta & Filifera (Fan palm)

All about Washingtonia robusta and Washingtonia filifera

Washingtonia robusta and Washingtonia filifera are popular fan palms that bring instant tropical vibes to gardens, conservatories and patios. They stand out with tall trunks and big fan shaped leaves that rustle in the breeze.

Washingtonia robusta, also known as the Mexican fan palm, is native to Baja California and northern Mexico. Washingtonia filifera, also known as the California fan palm, comes from the south west of the United States. In warm regions they can grow very tall. In our climate they stay smaller, yet they are fast for a palm.

Differences between robusta and filifera

• Washingtonia robusta has a slimmer trunk. Growth is faster. Cold tolerance is lower to around minus four degrees Celsius. Leaves are bright green and the crown is more open.
• Washingtonia filifera has a thicker trunk. Growth is a bit slower. Cold tolerance is better to around minus eight degrees Celsius. Leaves are grey green and the crown is fuller.

Popular features of Washingtonia

• Fast growing fan palms for a strong tropical look
• Great for large containers, conservatory and open ground in warm sheltered spots
• High ornamental value with large fan shaped leaves
• Easy to care for

How to care for Washingtonia

Sunlight

Give your palm a sunny position. More sun means better and faster growth. A bright conservatory also works well.

Temperature and hardiness

Robusta handles cold down to about minus four degrees Celsius. Filifera handles cold down to about minus eight degrees Celsius. During severe or prolonged frost protect roots with mulch and wrap the trunk with fleece. In pots add extra protection because the root ball freezes more quickly.

Watering

Water regularly through the growing season. Keep soil slightly moist but avoid waterlogging. In winter water less, especially in a cool spot.

Soil and feed

Use free draining fertile soil. Feed in spring and summer from time to time with a palm fertiliser for strong growth.

Pruning

Remove old brown fronds close to the trunk to keep things tidy. Leave young green fronds on the plant.

Toxicity

Washingtonia is not toxic to people or pets. Wear gloves when pruning as leaf stalks can have sharp edges.