Gumweed, Grindelia stricta var. platyphylla

About Gumweed (Grindelia stricta var. platyphylla) 15 Nurseries Carry This Plant

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Gumweed (Grindelia stricta var. platyphylla) is a native perennial herb that grows in Southern and Central California, primarily in the Central Coast region. It is a member of the Asteraceae and has typical sunflower floral structure with yellow disk flowers and ray flowers. It tends to grow in tidal flats, coastal strand, and coastal sage scrub typically very near the ocean, at elevations from 0-700 feet. There are three recognized varieties of Grindelia stricta; var. platyphylla is broadly distributed along the coast from Del Norte County to Los Angeles County and the northern Channel Islands. The flower bud is distinctive in having large amount of sticky white sap which native people used as an adhesive. The plant has a prostrate, sprawling habit and roots as it spreads. It performs best in coastal gardens with sandy soil.

Plant Description

Plant Type

Perennial herb

Size

1 - 1.6 ft tall
7 ft wide

Form

Spreading

Growth Rate

Moderate

Dormancy

Evergreen

Fragrance

None

Flower Color

Yellow

Flowering Season

Spring, Summer, Fall

Wildlife Supported

Butterflies are attracted to the flowers and buds
Butterfly gardens

Butterflies & moths hosted ( 10 likely * ) SHOW ALL

Western Yellowstriped Armyworm Spodoptera praeficaSpodoptera praefica

Spotted Straw Sun Moth Heliothis phloxiphagaHeliothis phloxiphaga

Sunflower Moth Homoeosoma electellaHomoeosoma electella

Bertha Armyworm Mamestra configurataMamestra configurata

Orange Tortrix Moth Argyrotaenia franciscanaArgyrotaenia franciscana

Snakeweed Borer Pelochrista ridingsanaPelochrista ridingsana

Dejongia californicusDejongia californicus

Landscaping Information

Sun

Full Sun, Part Shade

Moisture

Low

Summer Irrigation

Max 3x / month once established

Nurseries

Carried by 15

Ease of Care

Very Easy

Cold Tolerance

Tolerates cold to 30° F

Soil Drainage

Fast

Soil Description

Mostly sandy. Tolerates Saline Soil. Soil PH: 5.0 - 7.5

Common uses

Groundcovers, Deer Resistant, Butterfly Gardens

Companion Plants

Other coastal plants such as Sand Verbena (Abronia species), Silver Beachweed (Ambrosia chamissonis), Beach Sage (Artemisia pycnocephala), Morningglory (Calystegia species), Beach Evening Primrose (Camissoniopsis cheiranthifolia), Seaside Daisy (Erigeron species), Lupine (Lupinus species), Hummingbird Sage (Salvia spathacea), Penstemon species.

Maintenance

Deadhead to encourage flowering

Propagation?

Rooted cuttings

Sunset Zones?

5, 7, 8, 9, 14*, 15, 16, 17*, 19, 20, 21, 22*, 23*, 24

Natural Setting

Site Type

Tidal flats, marshes, dunes, seabluffs and coastal strand where it receives extra moisture from fog and sea spray. Also occurs in coastal sage scrub in more upslope areas

Climate

Annual Precipitation: 11.8" - 75.0", Summer Precipitation: 0.17" - 1.98", Coldest Month: 43.7" - 55.7", Hottest Month: 56.8" - 71.9", Humidity: 0.02" - 17.07", Elevation: 3" - 1728"

Alternative Names

Common Names: Oregon Gumweed

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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

Gumweed

Grindelia stricta var. platyphylla

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GumweedGrindelia stricta var. platyphylla

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Gumweed

Grindelia stricta var. platyphylla