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Giant Coreopsis
Leptosyne gigantea
About Giant Coreopsis (Leptosyne gigantea) Nurseries Show All Photos Giant Coreopsis is a woody perennial plant native to California and Baja California. The stem is a trunk 1-2 meters tall, 4-10 centimeters in diameter, occasionally branching. Bright green leaves and flowers are on the top of the trunk, the rest of the trunk is bare. The flowers are yellow, daisy-like, and 6-20 centimeters in size. It is summer deciduous, leaving a bare trunk in summer. It is distributed on the South California central coast, north and central Southern California coast, the California Channel Islands, and further south on Guadalupe Island, Mexico. Now becoming more common due to its use in revegetation projects.
Plant Description
Plant Type
Shrub, Succulent

Max. Height
3.3 - 8 ft (1 - 2.4 m)

Max. Width
2 - 4 ft (0.6 - 1.2 m)

Rounded, Upright Columnar


Growth Rate

Summer Deciduous, Winter Deciduous

Bright green, delicate, lacy, resembling carrot greens. In summer they dry and hang limply alongside the stem

Flower Color

Flowering Season
Spring, Winter

Native Status

Natural Setting
Site Type
Coastal sage scrub or chaparral hillsides, dunes, and seabluffs. Prefers to be within a few miles of the coast


Elevation ?
-146' - 1900'

Annual Precip. ?
8.7" - 27.2"

Summer Precip. ?
0.14" - 0.40"

Coldest Month ?
46.7° F - 57.3° F

Hottest Month ?
60.0° F - 77.4° F

Humidity ?
0.89 vpd - 22.43 vpd

Soil Description
Prefers sand or sandstone

Soil Texture
Loamy Sand, Sand, Sandy Loam

Soil PH
5.0 - 7.0

Fast, Medium

Cold Tolerance(° F)
Tolerates cold to 25° F

Sunset Zones ?
14, 15*, 16*, 17*, 19, 20*, 21*, 22*, 23*, 24*

Companion Plants
Seacliff Buckwheat, Red Sand Verbena, Beach Sage, Beach Morningglory

Wildlife Attracted

Landscaping Information
Ease of Care
Moderately Easy

Water Requirement ?
Extremely Low, Very Low
Extremely Low
Very Low
Moderate - High

Seldom Used

Max. Summer Water ?
No Summer Water
No Summer Water
Keep moist

Dried leaves may be removed in summer if desired

Propagation ?
May be propagated from cuttings taken in Winter.  For propagating by seed: No treatment.

Common uses
Bank Stabilization, Hedges, Bee Gardens

Nursery Availability
Commonly Available

Other Names
Botanical Names
Coreopsis gigantea

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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