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Family: rosaceae
Common name(s): Hardbark spirea; Steeplebush
Hardiness ratings: USDA zone 3 - 8 
General resources
Links for Spiraea tomentosa
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-8)
 (2 photos)
- Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (2 photos)
- Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (8 photos)
- Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 3-8)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 3-8) (7 photos)
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- Trees and Shrubs Online - Reference page curated by the International Dendrology Society with descriptive characteristics and horticultural notes.
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