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Monterey Ceanothus
( Ceanothus rigidus )
Ceanothus rigidus
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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14 Nurseries Carry This Plant
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About Monterey Ceanothus (Ceanothus rigidus)
14 Nurseries Carry This Plant
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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
Shrub
Size
4 - 6 ft tall
5 - 15 ft wide
Form
Mounding, Rounded, Spreading
Growth Rate
Moderate
Dormancy
Evergreen
Flower Color
Blue, Purple, White
Flowering Season
Winter, Spring
Wildlife Supported
Native bees, butterflies, other pollinators
Butterflies & moths hosted ( 77
likely
* )
SHOW ALL
*
Gray Hairstreak
Strymon melinus
Strymon melinus
*
Pale Tiger Swallowtail
Papilio eurymedon
Papilio eurymedon
*
Lorquin's Admiral
Limenitis lorquini
Limenitis lorquini
*
California Tortoiseshell
Nymphalis californica
Nymphalis californica
*
The Brown Elfin
Callophrys augustinus
Callophrys augustinus
*
Pacuvius Duskywing
Erynnis pacuvius
Erynnis pacuvius
*
Hedgerow Hairstreak
Satyrium saepium
Satyrium saepium
Landscaping Information
Sun
Full Sun
Moisture
Very Low
Summer Irrigation
Max 1x / month once established
Nurseries
Carried by 14
Ease of Care
Very Easy, Moderately Easy
Cold Tolerance
Tolerates cold to 15 - 25° F
Soil Drainage
Fast, Medium, Slow
Soil Description
Adaptable
Common uses
Bank Stabilization, Hedges, Deer Resistant, Bird Gardens, Butterfly Gardens, Bee Gardens
Propagation
?
For propagating by seed: Hot water treatment.
Sunset Zones
?
8, 9, 14*, 15*, 16*, 17*, 19, 20, 21, 22*, 23*, 24*
Natural Setting
Site Type
Dry fans, slopes, ridges
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
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Monterey Ceanothus
Ceanothus 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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