Home
Advanced Search Map Locator
View Settings
Nurseries Carrying this Plant Add Current Plant To List Edit Current Plant
Show all Photos

Butterflies My Plant Lists Nurseries Planting Guide Contact Calscape About Calscape
Tap map to see plants native to location
Order by Popularity Order by Common Name Order by Scientific Name Order by # of Butterflies Hosted
Show nursery cultivars Hide nursery cultivars
Show plants not in nurseries Hide plants not in nurseries
Grid view Text view
Loading....
Coulter's Matilija Poppy
Romneya coulteri
  
About Coulter's Matilija Poppy (Romneya coulteri) 43 Nurseries Carry This Plant Romneya coulteri (Coulter's Matilija poppy) is species of flowering plant in the poppy family. This poppy is native to southern California and Baja California, where it grows in dry canyons in chaparral and coastal sage scrub plant communities, sometimes in areas recently burned.It is a popular ornamental plant, kept for its large, showy flowers. This is a shrub which may exceed two meters in height, its woody stem growing from a network of rhizomes. The gray-green, waxy-textured leaves are each divided into a few lance-shaped lobes, the blades growing up to 20 centimeters long. The inflorescence is a large, solitary flower with six crinkly white petals each up to 10 centimeters long. At the center of the flower is a cluster of many yellow stamens. The fruit is a bristly capsule 3 or 4 centimeters long containing many tiny seeds. This plant bears the largest flowers of any species native to California, rivaled only by Hibiscus lasiocarpos. It was nominated for the honor of California state flower in 1890, but the California poppy won the title in a landslide. A closely related species, Romneya trichocalyx, has more spiny sepals on the flower buds and overall smaller plant and flowers.

It is summer deciduous and winter dormant, so patience is required to get it established. Once established, it spreads aggressively and may need to be controlled to prevent undesired expansion. Pulling shoots is usually effective.
Plant Description
Plant Type
Plant Type
Perennial herb

Size
Size
6.6 - 10 ft tall
20 ft wide

Form
Form
Upright Columnar, Weeping

Growth Rate
Growth Rate
Moderate

Dormancy
Dormancy
Summer Deciduous

Fragrance
Fragrance
None

Flower Color
Flower Color
White, Yellow

Flowering Season
Flowering Season
Spring, Summer

Wildlife Supported
 
Bees, butterflies

 
Butterflies & moths hosted ( 1 likely * ) SHOW ALL
*
Neoterpes edwardsata Image
Neoterpes edwardsataNeoterpes edwardsata

Landscaping Information
Sun
Sun
Full Sun

Moisture
Moisture
Low

Summer Irrigation
Summer Irrigation
Never irrigate once established

Nurseries
Nurseries

Ease of Care
Ease of Care
Very Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to -6° F

Soil Drainage
Soil Drainage
Fast, Medium

Soil Description
Soil Description
Prefers sandy or gravelly soil with fast drainage. Soil PH: 5.0 - 8.0

Common uses
Common uses
Deer Resistant

Companion Plants
Companion Plants
Grows well with a wide variety of chaparral plants including Scrub Oaks, Manzanitas, Coyote Brush, Laurel Sumac, Chaparral Mallow, Toyon, and Lemonade Berry

Maintenance
Maintenance
It is advisable to cut down to 6 inches in late Summer or Fall. Dried leaves and stalks make excellent mulch when chopped or broken up

Propagation
Propagation?
Usually by rhizomes during winter. Disturbing the rhizomes at other times is usually fatal. Propagation by seeds is difficult.  For propagating by seed: Fire treatment in late fall and germinate outdoors; or soak in l N potassium hydroxide (KOH) 1/2 hr., then soak in 100 ppm GA3 overnight. Soaking in KOH followed by 3 mos. stratification, then GA3 may improve germination ( Harrington 1975). 3 mos. stratification gives some germination.

Sunset Zones
Sunset Zones?
4*, 5*, 6, 7*, 8*, 9*, 10, 11, 12, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Natural Setting
Site Type
Site Type
Dry washes, canyons and foothills, with chaparral or coastal sage scrub vegetation

Climate
Climate
Annual Precipitation: 10.1" - 38.8", Summer Precipitation: 0.21" - 0.94", Coldest Month: 34.3" - 55.2", Hottest Month: 68.4" - 80.6", Humidity: 0.96" - 26.97", Elevation: 52" - 5136"


Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora


Sign in to your Calscape Account X




Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address
Password

Sign In