California Native Plant Society
Tap map to see plants native to location
Add
Ceanothus divergens
Please enter either the common name or the botanical name of any native California plant species to see it's plant record

Loading....
Calistoga Ceanothus
  • Added Add to My Plant List
Ceanothus divergens
  

Zoom To My AddressZoom To California Estimated Plant Range




About Calistoga Ceanothus (Ceanothus divergens) 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
Shrub

Max. Height
1.6 - 3 ft (0.49 - 0.9 m)

Max. Width
3 ft (0.9 m)

Fragrance
Fragrant - Pleasant

Growth Rate
Moderate

Dormancy
Evergreen

Flower Color
Blue, Purple, Red

Flowering Season
Spring, Winter
Spring
Summer
Fall
Winter


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

Sun
Sun

Elevation ?
24' - 4310'

Annual Precip. ?
15.6" - 61.3"

Summer Precip. ?
0.23" - 0.83"

Coldest Month ?
42.1° F - 49.7° F

Hottest Month ?
62.1° F - 74.3° F

Humidity ?
0.48 vpd - 22.04 vpd

Soil Description
Typically rocky soils

Drainage
Fast

Cold Tolerance(° F)
Tolerates cold to 10° F

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

Landscaping Information
Ease of Care
Moderately Easy

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


Popularity
Seldom Used

Mulch
Organic with Rocks

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

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

Nursery Availability
Rarely Available


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

Sign in to your Calscape Account X




Once signed in, you'll be able to access any previously saved plant lists or create new ones.

Email Address
Password

Sign In


Copyright © 1999-2014 California Native Plant Society. All rights reserved.