Photo by Melody

PlantFiles: Coulter's Matilija Poppy, California Tree Poppy
Romneya coulteri 'White Cloud'

Family: Papaveraceae (pa-pav-er-AY-see-ee) (Info)
Genus: Romneya (ROM-nee-uh) (Info)
Species: coulteri (kol-TER-ee-eye) (Info)
Cultivar: White Cloud


4-6 ft. (1.2-1.8 m)

4-6 ft. (1.2-1.8 m)

USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
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

Unknown - Tell us

Bloom Color:
White/Near White

Bloom Time:
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall


Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By growin
Thumbnail #1 of Romneya coulteri by growin

By growin
Thumbnail #2 of Romneya coulteri by growin

By growin
Thumbnail #3 of Romneya coulteri by growin


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive DisHammerhand On Apr 25, 2014, DisHammerhand from Fontana, CA wrote:

White Cloud has crinklier flowers and lusher foliage that is more silver. My plants grow larger flowers than the regular species well.

I planted White Cloud the first year I lived in my house. I stuck in in the ugly gravelly weed patch by the garage. Now there are no weeds and no patch. It is a solid thicket of Matilija Poppy. It ran under the driveway and it's coming up in the front yard right in front of my porch.

I put another on the corner with the cactus, (I live on a corner) now it's coming up all over.

It takes a few years for Matilija Poppy to start misbehaving.

If you have good drainage, water extends The bloom season -and the spread.

If you're going to have a weed problem, this is the one to have. Traffic stoppingly gorgeous.


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

Alameda, California
Fontana, California
Winchester, California

We recommend Firefox
Overwhelmed? There's a lot to see here. Try starting at our homepage.

[ Home | About | Advertise | Media Kit | Mission | Featured Companies | Submit an Article | Terms of Use | Tour | Rules | Privacy Policy | Contact Us ]

Back to the top

Copyright © 2000-2015 Dave's Garden, an Internet Brands company. All Rights Reserved.

Hope for America