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Monterey Ceanothus
Ceanothus rigidus
  
About Monterey Ceanothus (Ceanothus rigidus) 13 Nurseries Carry This Plant Monterey Ceanothus (Ceanothus rigidus previously called Ceanothus cuneatus var. rigidus) is a rare native shrub that grows in Northern, Southern and Central California, primarily in the Central Coast and SF Bay regions. It tends to grow in dry fans, slopes and ridges, at elevations from 0-5900 feet.

Ceanothus rigidus is primarily available in nurseries as cultivars - the two most common of which are Ceanothus rigidus 'Snowball', and Ceanothus rigidus'' 'Sierra Snow'. Both have profuse white flowers, and a dense form with arching branches the former of The Snowball variety ranges from 4-5 high and 8 feet wide, and Sierra Snow ranges from 5-6 feet high and 10-15 feet wide. Both are relatively easy to grow in the natural coastal range of the straight Ceanothus rigidus species.
Plant Description
Plant Type
Plant Type
Shrub

Size
Size
4 - 6 ft tall
5 - 15 ft wide

Form
Form
Mounding, Rounded, Spreading

Growth Rate
Growth Rate
Moderate

Dormancy
Dormancy
Evergreen

Flower Color
Flower Color
Blue, Purple, White

Flowering Season
Flowering Season
Winter, Spring

Wildlife Supported
 
Native bees, butterflies, other pollinators

Landscaping Information
Sun
Sun
Full Sun

Moisture
Moisture
Very Low

Summer Irrigation
Summer Irrigation
Max 1x / month once established

Nurseries
Nurseries

Ease of Care
Ease of Care
Very Easy, Moderately Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to 15 - 25° F

Soil Drainage
Soil Drainage
Fast, Medium, Slow

Soil Description
Soil Description
Adaptable

Common uses
Common uses
Bank Stabilization, Hedges, Deer Resistant, Bird Gardens, Butterfly Gardens, Bee Gardens

Propagation
Propagation?
For propagating by seed: Hot water treatment.

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

Natural Setting
Site Type
Site Type
Dry fans, slopes, ridges

Climate
Climate
Annual Precipitation: 10.1" - 61.8", Summer Precipitation: 0.17" - 1.70", Coldest Month: 33.7" - 56.4", Hottest Month: 54.8" - 77.5", Humidity: 0.50" - 23.53", Elevation: -14" - 6772"

Alternative Names
Botanical Names: Ceanothus cuneatus var. rigidus


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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