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Del Mar Manzanita
Arctostaphylos glandulosa ssp. crassifolia

About Del Mar Manzanita (Arctostaphylos glandulosa ssp. crassifolia) Del Mar or Costa Baja Manzanita (Arctostaphylos glandulosa ssp. crassifolia) is a rare native shrub that grows in Southern California, primarily in the South Coast region. Depending on the time of year, leaves can be pinkish, slivery, blue green or dark green. It tends to grow in rocky outcrops, slopes and ridges, at elevations from 0-700 feet. It can grow to 8 feet, but is usually under 4 feet with a loose mounding form.

Del Mar Manzanita is beautiful, relatively easy to grow and among the fastest growing of the manzanitas. It seems to do best if planted in the spring, when it can grow quickly and establish itself before the dry summer months. It handles weekly water for the first year after planting, after which it's best to naturalize. Plant on slopes or well draining flats. It will look green and vibrant year round if it can stretch its roots out to a nearby damper spot or irrigated area. It likes sun or part shade.
Plant Description
Plant Type

Max. Height
0.15 - 8 ft (0.05 - 2.4 m)

Max. Width
6 ft (1.8 m)

Mounding, Spreading


Growth Rate


Stiff, firm, hairy leaves varying in color seasonally; new growth is pink, becoming bright green and fading to blue green or grey green. Underside of leaves is typically lighter in color and more hairy. May drop many leaves in response to drought or cold

Flower Color
Cream, Pink

Flowering Season
Spring, Winter

Native Status
Natural Setting
Site Type
Rocky outcrops, slopes, ridges, or mesas where it is found in a rare vegetation community known as southern maritime chaparral, along with a number of other rare plants

Part Shade, Sun

Elevation ?
23' - 4125'

Annual Precip. ?
10.6" - 24.2"

Summer Precip. ?
0.25" - 1.52"

Coldest Month ?
41.0° F - 55.3° F

Hottest Month ?
69.0° F - 76.8° F

Humidity ?
1.39 vpd - 20.80 vpd

Soil Description
This subspecies prefers eroded sandstone soils of marine deposits that are typical of coastal San Diego County

Soil Texture

Soil PH
6 - 7.6

Fast, Medium

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

Wildlife Attracted
A number of bird species and small mammals are attracted to manzanita berries

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

Seldom Used

Max. Summer Water ?

No Summer Water
Keep moist

Organic with Rocks

Accepts light pruning to shape or direct growth. This plant is subject to periodic branch die-back. This is usually not fatal to the plant. Dead branches may be removed or left in place. This is one of the burl forming Manzanitas that is able to regrow quickly after a fire.

Pest Control
May be subject to soil pathogens if overwatered, especially in summer

Propagation ?
Plant may spread by tip rooting

Common uses
Bank Stabilization, Groundcovers, Bird Gardens, Hummingbird Gardens, Bee Gardens

Nursery Availability
Sometimes 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

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