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Coastal Agave
Agave shawii
  
About Coastal Agave (Agave shawii) 10 Nurseries Carry This Plant Agave shawii is an agave found only along the Pacific coast of Baja California, extending slightly north into the coastal chaparral of southernmost California. It is a small-to-medium agave, with green ovate leaves 20-50 centimeter long and 8-20 centimeter wide, and a variable pattern of marginal teeth. Individual rosettes flower after 20-30 years of growth, after which that rosette dies. The flower cluster forms a panicle 2-4 meters in height, whose 8-14 lateral umbels are subtended by large purple leaves. Each umbel consists of a mass of yellowish or reddish flowers. It produces numerous offsets or pups which form a large thicket.
Plant Description
Plant Type
Plant Type
Shrub, Succulent

Size
Size
6.6 - 13.1 ft tall
3 ft wide

Form
Form
Fountain, Spreading

Growth Rate
Growth Rate
Slow

Dormancy
Dormancy
Evergreen

Flower Color
Flower Color
Yellow, Red

Flowering Season
Flowering Season
Winter, Spring, Summer, Fall

Wildlife Supported
 
The plant attracts wildlife primarily when in bloom which is infrequent for individual rosettes. It is most attractive to insects and nectar eating birds. In the wild, small mammals use agave thickets for protection.

 
Butterflies & moths hosted ( 1 confirmed , 1 likely * ) SHOW ALL

Landscaping Information
Sun
Sun
Full Sun

Moisture
Moisture
Very Low

Summer Irrigation
Summer Irrigation
Never irrigate once established

Nurseries
Nurseries

Ease of Care
Ease of Care
Moderately Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to 25° F

Soil Drainage
Soil Drainage
Fast

Soil Description
Soil Description
Often rocky and low in organic material. Soil PH: 6.0 - 8.0

Companion Plants
Companion Plants
California Encelia, Bushrue, Chamise, Cliff Spurge, Box Thorn, San Diego Bursage, Jojoba, Sea Dahlia, and various Cacti

Maintenance
Maintenance
None needed. Prune only when necessary, and use extreme caution. Avoid all skin contact with the sap. Handle leaves with care - spines are very sharp.

Propagation
Propagation?
May be propagated from offsets, but extreme caution is needed due to the dangerous spines..  For propagating by seed: No treatment.

Natural Setting
Site Type
Site Type
Bluffs and slopes or rocky mesas; produces many offsets and tends to spread laterally; can form large, impenetrable patches

Climate
Climate
Annual Precipitation: 9.5" - 11.1", Summer Precipitation: 0.18" - 0.31", Coldest Month: 54.1" - 56.5", Hottest Month: 69.3" - 72.8", Humidity: 1.82" - 14.67", Elevation: 0" - 314"

Alternative Names
Common Names: Shaw's Agave


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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