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Douglas's Spirea
Spiraea douglasii
  
About Douglas's Spirea (Spiraea douglasii) 17 Nurseries Carry This Plant Douglas's Spirea (Spiraea douglasii) is a native shrub that grows in northern California. It is moderately fast growing and long-lived. It grows in a semi-upright form to a height of 7 feet, with active growth during the spring and summer. Flowers are purple and striking, and bloom in the mid summer. Leaves are dark green and deciduous. It tends to grow at elevations from 0-6400 feet.
Plant Description
Plant Type
Plant Type
Shrub

Size
Size
5 - 7 ft tall
3 - 4 ft wide

Form
Form
Upright

Growth Rate
Growth Rate
Fast, Moderate

Dormancy
Dormancy
Evergreen, Winter Deciduous

Fragrance
Fragrance
Fragrant - Pleasant

Flower Color
Flower Color
Purple, Pink

Flowering Season
Flowering Season
Summer

Wildlife Supported
 
Provides good cover for birds and small mammals. It attracts hummingbirds, butterflies, bees, and other pollinators.

Landscaping Information
Sun
Sun
Part Shade, Full Sun

Moisture
Moisture
Moderate - High

Summer Irrigation
Summer Irrigation
Keep moist

Nurseries
Nurseries

Ease of Care
Ease of Care
Very Easy

Cold Tolerance
Cold Tolerance
Tolerates cold to -10 - 0° F

Soil Drainage
Soil Drainage
Fast, Medium, Slow

Soil Description
Soil Description
Prefers sandy or loamy soils. Does not grow well in clay soils.. Soil PH: 5 - 7

Common uses
Common uses
Hedges, Groundcovers

Companion Plants
Companion Plants
Rose Spirea is widely tolerant of many growing conditions, but can become invasive as it spreads readily, but with under careful management can be easily controlled. Consider planting with Christmas Berry (Heteromeles arbutifolia), Blue Eyed Grass (Sisyrinchium bellum), and Brown Dogwood (Cornus glabrata).

Maintenance
Maintenance
Hosts aphids, leaf rollers, and scales.

Propagation
Propagation?
For propagating by seed: 1-3 mos. stratification. Rose spirea may also be propagated by readily cuttings from softwood, semihardwood, and dormant hardwood; by layering; through rhizomes and root segments (in spring); and division.

Sunset Zones
Sunset Zones?
1, 2, 4*, 5*, 6*, 7*, 8, 9, 14*, 15*, 16*, 17*, 18, 19, 20, 21, 22, 23, 24

Natural Setting
Site Type
Site Type
Moist forests, creeksides or other damp areas

Climate
Climate
Annual Precipitation: 14.0" - 119.9", Summer Precipitation: 0.48" - 4.08", Coldest Month: 10.8" - 49.2", Hottest Month: 34.1" - 75.5", Humidity: 0.20" - 24.62", Elevation: 7" - 14090"

Alternative Names
Common Names: Douglas Spiraea, Douglas' Spirea, Rose Spirea


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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