Washingtonia x filibusta

Family: Arecaceae (ar-ek-AY-see-ee) (Info)
Genus: Washingtonia (Washing-ton-ee-a) (Info)
Species: x filibusta (fil-ih-BUS-ta) (Info)



Tropicals and Tender Perennials


Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Suitable for growing in containers


30-40 ft. (9-12 m)


15-20 ft. (4.7-6 m)


USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:

Full Sun

Sun to Partial Shade


Plant has spines or sharp edges; use extreme caution when handling

Bloom Color:

White/Near White

Bloom Time:

Unknown - Tell us


Grown for foliage



Other details:

May be a noxious weed or invasive

Soil pH requirements:

5.6 to 6.0 (acidic)

6.6 to 7.5 (neutral)

7.9 to 8.5 (alkaline)

Patent Information:


Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Anniston, Alabama

Mobile, Alabama

Palm Springs, California

Hollywood, Florida

Niceville, Florida

Chicago, Illinois

Plainfield, Indiana

Stilwell, Oklahoma

Portland, Oregon

Redmond, Oregon

North, South Carolina

Houston, Texas

Bremerton, Washington

Vancouver, Washington

show all

Gardeners' Notes:


On Dec 16, 2015, siege2055 from Stilwell, OK (Zone 7a) wrote:

Was sent some of these seeds from a yard in California where they are said to sprout everywhere. I am pretty sure they are Filibusta as I have read pure Robusta are harder to find now, but they do have the reddish coloration on the stem like a robusta so not Filifera.They germinated in 7 days in a glass of water, their growth is very fast for a palm and they are already approaching 1 1/2 feet in 3 months with a little trunk already, and 3 leaves.They are growing like this even in winter grown only under shop lights with lower heat. In sunlight with more heat, the growth rate would be even faster and I can't wait to see what they do this next summer. My plan is to grow them in containers and put them out each year by planting the pots in the ground for stability, then lifting them and stori... read more


On Jul 18, 2014, Cali_Boy137 from Vancouver, WA wrote:

It Grows Great in Vancouver, WA and I've Seen big and tall ones in Portland, OR i saw one in portland that was like 130 feet! :)


On Apr 10, 2012, SuburbanNinja80 from Plainfield, IN (Zone 6a) wrote:

Something I noticed. California fan palm has green thorns as the Mexican fan palm has red thorns. The hybrid I have orange thorns. Most say I love this palm. I wonder it can reproduce to a california fan palm that I also own. The joy of cold hardy palms.


On Mar 5, 2012, haleybug1109 from Bremerton, WA wrote:

I have a Washingtonia Filibusta growing outside in my Bremerton Wa.(Seattle area) yard. This palm has been in the ground 2 winters now with only minor damage. This particular plant I have is 6 feet tall 4 1/2 trunk feet and has frond color of Robusta (green green not olive green) and frond shape of Filifera and has had only minor damage at 14F. Our winters here are our wet season and tolerates this fairly well and grows back quite well in the summer with the dry season and the low humidity.


On Jun 12, 2011, NorthSC from North, SC (Zone 8a) wrote:

Washingtonia FiliBusta hybrid grows here without protection and is completely defoliated (browned) but grows back in spring and it starts growing as early as February, but it may get in trouble or even be killed on colder winters. I have one dead, but I suspect it may have been killed by voles?

Will try W. filifera from now on, probably a good one for this area too as long as its kept in a well draining soil.

If anyone in mid SC has flifera growing in ground successfully I'd like to see if possible. I know only one W. filifera (or is it a hybrid?), which is very large and grows right next to Hwy 378 which is a Sunset Boulevard between Columbia and Lexington, SC.

I think SC needs plenty of Wash. Filiferas as they should do well here and would be... read more


On Jan 20, 2006, ineedacupoftea from Denver, CO wrote:

This is a hybrid of W. filifera and W. robusta. Just what odds that an ironic and comical name like "Washingtonia x filibusta" would come to be, we will never know. Perhaps the same reason that a peice of toast always lands on the floor jam-side down; landing jam-side up only when a dog is nearby to eat it before one can retreive it. The palm is said to be somewhat drought tolerant and rumored to be hardier than both parents. Relatively new to cultivation; coming to a Senate near you...