PlantFiles is getting a new look! Just in time for spring, we're rolling out a new look for the best online plants database. It will also work with your smart phones and mobile devices, so now you can take it with you on garden center visits or botanical garden tours. Questions or comments? Please post them here.

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

Category:

Shrubs

Height:

4-6 ft. (1.2-1.8 m)

Spacing:

4-6 ft. (1.2-1.8 m)

Hardiness:

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

Danger:

Unknown - Tell us

Bloom Color:

White/Near White

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Foliage:

Evergreen

Blue-Green

Smooth-Textured

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

Regional

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

Alameda, California

Fontana, California

Winchester, California

Gardeners' Notes:

1
positive
0
neutrals
0
negatives
RatingContent
Positive

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 ... read more