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Hoaryleaf Ceanothus
Ceanothus crassifolius
About Hoaryleaf Ceanothus (Ceanothus crassifolius) Nurseries Show All Photos Ceanothus crassifolius is a species of flowering shrub known by the common name hoaryleaf ceanothus. This Ceanothus is found throughout the coastal mountain ranges of the southern half of California below 3,500 ft., and its range extends into Baja California. It is an erect, spreading shrub which can exceed three meters in height. The branches become long and the younger twigs are fuzzy with white or light brown hairs. The small evergreen leaves have widely-spaced teeth along the edges and the undersides are lighter in color and coated with hairs. The flower clusters are borne on short stalks less than three centimeters long and are small and rounded with tiny white flowers. They can be quite dense and can cover branches thickly, or they may be sparse. The flowers may have a yellowish or pink tint. The fruit is a horned capsule less than a centimeter wide. C. crassifolius typically occurs in California chaparral plant associations; other common flora associates are Toyon and Hollyleaf cherry.
Plant Description
Plant Type

Max. Height
5 - 14 ft (1.5 - 4.3 m)

Max. Width
5 - 10 ft (2-3 m)



Growth Rate


Resemble coast live oak leaves

Flower Color

Flowering Season
Spring, Winter

Native Status

Natural Setting
Site Type
Dry inland ridges, slopes and fans as part of southern chaparral

Sun, Part Shade

Elevation ?
3' - 10045'

Annual Precip. ?
8.5" - 52.7"

Summer Precip. ?
0.15" - 2.66"

Coldest Month ?
33.4° F - 55.3° F

Hottest Month ?
53.4° F - 81.1° F

Humidity ?
0.54 vpd - 31.47 vpd

Soil Description
Prefers granular, well drained soil such as decomposed granite

Soil PH
6.0 - 8.0


Cold Tolerance(° F)
Tolerates cold to 12° F

Sunset Zones ?
7*, 8, 9, 14, 15, 16, 17, 18*, 19*, 20*, 21*, 22*, 23*, 24*

Wildlife Attracted
insects, especially bees and butterflies. Plants in the Ceanothus genus are host plants to the Spring Azure, Echo Blue, Pacuvius Duskywing, California Tortoiseshell, Pale Swallowtail, and Hedgerow Hairstreak butterflies.

Landscaping Information
Water Requirement ?
Very Low
Extremely Low
Very Low
Moderate - High

Seldom Used

Max. Summer Water ?
No Summer Water
Keep moist

Inorganic, Organic with Rocks

Propagation ?
For propagating by seed: Hot water and 2-3 mos. stratification.

Common uses
Bank Stabilization, Bird Gardens, Butterfly Gardens, Bee Gardens

Nursery Availability
Sometimes Available

Other Names
Common Names
Hoary-leaved Ceanothus

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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