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Romneya coulteri
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Coulter's Matilija Poppy
( Romneya coulteri )
Romneya coulteri
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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81 Nurseries Carry This Plant
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About Coulter's Matilija Poppy (Romneya coulteri)
81 Nurseries Carry This Plant
Add to My Plant List
Coulter's Matilija Poppy (
Romneya coulteri
) is one of the largest and showiest California poppies. Large white petals with a crinkled texture surround yellow stamens, giving this poppy a bright, cheerful appearance. Its flowers, which can be as large as 7 inches across, are attractive to bees and butterflies.
This plant can be challenging to establish, as it can suffer from both too much and too little water. Once established, however, it readily spreads by rhizomes and can soon outgrow its intended area. (Pulling shoots usually suffices to control it.) Plant in full sun in well-draining, sandy soil. Matilija Poppy is a low-water plant that does not need supplemental summer irrigation once established.
Bornstein, C., Fross, D., O’Brien, B. (2005). California Native Plants for the Garden. Cachuma Press.
Plant Description
Plant Type
Perennial herb
Size
6.6 - 10 ft tall
20 ft wide
Form
Upright Columnar, Weeping
Growth Rate
Moderate
Dormancy
Summer Deciduous
Fragrance
None
Flower Color
White, Yellow
Flowering Season
Spring, Summer
Wildlife Supported
Bees, butterflies
Butterflies & moths hosted ( 1
likely
* )
SHOW ALL
*
Neoterpes edwardsata
Neoterpes edwardsata
Landscaping Information
Sun
Full Sun
Moisture
Low
Summer Irrigation
Never irrigate once established
Nurseries
Carried by 81
Ease of Care
Very Easy
Cold Tolerance
Tolerates cold to -6° F
Soil Drainage
Fast, Medium
Soil Description
Prefers sandy or gravelly soil with fast drainage. Soil PH: 5.0 - 8.0
Common uses
Deer Resistant
Companion Plants
Grows well with a wide variety of chaparral plants including
Scrub Oak
s, Manzanitas, Coyote Brush, Laurel Sumac, Chaparral Mallow, Toyon, and Lemonade Berry
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
?
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
?
4*, 5*, 6, 7*, 8*, 9*, 10, 11, 12, 14*, 15*, 16*, 17*, 18*, 19*, 20*, 21*, 22*, 23*, 24*
Natural Setting
Site Type
Dry washes, canyons and foothills, with chaparral or coastal sage scrub vegetation
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"
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Coulter's Matilija Poppy
Romneya coulteri
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
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