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Gumweed
Grindelia stricta var. platyphylla
  
About Gumweed (Grindelia stricta var. platyphylla) 7 Nurseries Carry This Plant 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
Plant Type
Perennial herb

Size
Size
1 - 1.6 ft tall
7 ft wide

Form
Form
Spreading

Growth Rate
Growth Rate
Moderate

Dormancy
Dormancy
Evergreen

Fragrance
Fragrance
None

Flower Color
Flower Color
Yellow

Flowering Season
Flowering Season
Spring, Summer, Fall

Wildlife Supported
 
Butterflies are attracted to the flowers and buds

 
Butterflies & moths hosted ( 10 likely * ) SHOW ALL

Landscaping Information
Sun
Sun
Full Sun, Part Shade

Moisture
Moisture
Low

Summer Irrigation
Summer Irrigation
Max 3x / month once established

Nurseries
Nurseries

Ease of Care
Ease of Care
Very Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to 30° F

Soil Drainage
Soil Drainage
Fast

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

Common uses
Common uses
Groundcovers, Deer Resistant, Butterfly Gardens

Maintenance
Maintenance
Deadhead to encourage flowering

Propagation
Propagation?
Rooted cuttings

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

Natural Setting
Site Type
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
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: Coastal Gumplant, Oregon Gumweed, Pacific Gum-plant


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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