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Calistoga Ceanothus
Ceanothus divergens
  
About Calistoga Ceanothus (Ceanothus divergens) 2 Nurseries Carry This Plant Ceanothus divergens, commonly known as Calistoga ceanothus, is a rare evergreen shrub in the Rhamnaceae family. It is found in just a few locations in the Northern California Coast Ranges of California at altitudes of less than 500 meters. Due to its rarity in the wild, it is included on CNPS list 1b.2. This plant has a growth habit described as ascending to erect and may attain a height of 3 ft. The plant's preferred habitat is on shrub-covered, rocky, volcanic slopes. The hermaphrodite blue or purple flowers bloom in April and May. The sub-globose fruits are five to six millimeters in diameter. This plant is rarely seen in cultivation and not often available for sale.
Plant Description
Plant Type
Plant Type
Shrub

Size
Size
1.6 - 3 ft tall
3 ft wide

Growth Rate
Growth Rate
Moderate

Dormancy
Dormancy
Evergreen

Fragrance
Fragrance
Fragrant - Pleasant

Flower Color
Flower Color
Blue, Purple, Red

Flowering Season
Flowering Season
Winter, Spring

Wildlife Supported
 


Landscaping Information
Sun
Sun
Full Sun

Moisture
Moisture
Very Low

Nurseries
Nurseries

Ease of Care
Ease of Care
Moderately Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to 10° F

Soil Drainage
Soil Drainage
Fast

Soil Description
Soil Description
Typically rocky soils

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

Companion Plants
Companion Plants
Use with any chaparral plants of the northern Coast Ranges

Propagation
Propagation?
For propagating by seed: Hot water; then 2-3 mos. stratification may improve germination.

Natural Setting
Site Type
Site Type
Dry rocky chaparral slopes of Marin, Sonoma and Napa Counties

Climate
Climate
Annual Precipitation: 15.6" - 61.3", Summer Precipitation: 0.23" - 0.83", Coldest Month: 42.1" - 49.7", Hottest Month: 62.1" - 74.3", Humidity: 0.48" - 22.04", Elevation: 24" - 4310"


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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