Hardhack (Spiraea douglasii) in the Spiraeas Database

Common names:
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General Plant Information (Edit)
Plant Habit: Shrub
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Wet Mesic
Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Maximum recommended zone: Zone 8b
Plant Height: 6-12 feet (2-4 m)
Leaves: Good fall color
Deciduous
Broadleaf
Flowers: Showy
Blooms on new wood
Flower Color: Pink
Bloom Size: Under 1"
Flower Time: Summer
Underground structures: Rhizome
Suitable Locations: Bog gardening
Uses: Windbreak or Hedge
Will Naturalize
Wildlife Attractant: Bees
Resistances: Flood Resistant
Toxicity: Other: May be toxic in high quantities, although sensitivity varies with age, weight, and physical condition.
Propagation: Other methods: Cuttings: Stem
Stolons and runners
Pollinators: Various insects
Miscellaneous: Tolerates poor soil
Monoecious
Goes Dormant
Conservation status: Least Concern (LC)

Conservation status:
Conservation status: Least Concern
Image

Photo gallery:
Location: TwispDate: October
By lauribob
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Location: Twisp
By lauribob
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Location: TwispDate: November
By lauribob
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Location: Cedarhome, WashingtonDate: 2017-07-14
By Bonehead
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Comments:
Posted by Bonehead (Planet Earth - Zone 8b) on Feb 15, 2013 4:22 PM

This is native in the Pacific Northwest from Alaska to California, east to Idaho; more common west of the Cascade Range. Found growing along waterways or in swampy or marshy areas.

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Posted by ILPARW (southeast Pennsylvania - Zone 6b) on Dec 20, 2019 9:53 AM

The species name of this shrub was named after a Scottish botanist of David Douglas. I would call this plant the Western or Douglas Steeplebush, and it is extremely similar to the Eastern Steeplebush of Spiraea tomentosa of eastern North America. This western species is native from southeast Alaska into northern California to western Montana and much of Idaho with a spot in northwest Colorado in bogs and wetlands. It differs from the eastern species in growing larger and having slightly larger leaves to 4 inches long and slightly larger flower spikes to 8 inches long. I would recommend that the two species really be two different varieties of the same species, as they are so very much alike.

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Discussion Threads about this plant
Thread Title Last Reply Replies
A shrub with top purple/pink flower by Pavelas Sep 12, 2019 11:26 AM 3
Floristically Challenged Alphabet Soup: Letters S through Z. by KatEnns Apr 5, 2018 10:06 AM 24
Lifting sod by AnnaZ Apr 21, 2017 8:18 PM 11
Rosy spirea by Bonehead Aug 15, 2014 3:10 PM 3

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