Spiraea Species, Hardhack, Steeplebush, Rose Spiraea, Western Spiraea

Spiraea douglasii

Family
Rosaceae (ro-ZAY-see-ee)
Genus
Spiraea (spy-REE-ah)
Species
douglasii (dug-LUS-ee-eye)
Synonym
Drimopogon douglasii
Drimopogon menziesii
Spiraea fulvescens
Sun Exposure
Full Sun
Foliage
Deciduous
Height
36-48 in. (90-120 cm)
4-6 ft. (1.2-1.8 m)
Spacing
4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Bloom Color
Pale Pink
Pink
Lavender
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Shrubs
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Foliage Color
Where to Grow
Grow outdoors year-round in hardiness zone
Bloom Characteristics
This plant is attractive to bees, butterflies and/or birds
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From softwood cuttings
From hardwood cuttings
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
By simple layering
By stooling or mound layering
Seed Collecting
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Southport, North Carolina

Mill City, Oregon

Bellingham, Washington

Grand Mound, Washington

Lakewood, Washington

Mountlake Terrace, Washington

North Sultan, Washington

Rochester, Washington

Spokane, Washington

Stanwood, Washington

Sultan, Washington

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Gardener's Notes:

2
positives
0
neutral
0
negative
Sort By:
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N
Southport, NC | July 2019 | positive

Almost identical to Spiraea tomentosa, the Eastern version -- you might say -- of Spiraea douglasii. Very similar appearance, growing ha...Read More

B
Cedarhome, WA (Zone 8b) | July 2011 | positive

PNW native, growing on streambanks, swamps, lake margins, and damp meadows in low to middle elevations. Forms a solid thicket if allowed...Read More

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