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TREES & plants

Hardhack

Hardhack or Steeplebush spirea is a colony-forming native shrub found in acidic, boggy areas. Prefers a cool climate in upper Midwest. All parts of plant have a hairy, rusty appearance. Best used in sunny, wet landscapes.  Can be purchased through local native plant nurseries.

Botanical name: 
Spiraea tomentosa (syn. Spiraea tomentosa var rosea)
All Common Names: 
Hardhack, Canada-tea, Steeplebush
Family (English): 
Rose
Family (Botanic): 
Rosaceae
Tree or Plant Type: 
  • Shrub
Native Locale: 
  • Chicago area, 
  • Illinois, 
  • North America
Landscape Uses: 
  • Hedge, 
  • Massing, 
  • Screen, 
  • Specimen
Size Range: 
  • Small shrub (3-5 feet)
Light Exposure: 
  • Full sun (6 hrs direct light daily)
Hardiness Zones: 
  • Zone 4, 
  • Zone 5 (Chicago), 
  • Zone 6
Soil Preference: 
  • Acid soil, 
  • Sandy soil
Season of Interest: 
  • Mid summer, 
  • Late summer
Flower Color & Fragrance: 
  • Pink
Shape or Form: 
  • Multi-stemmed, 
  • Thicket-forming, 
  • Upright
Growth Rate: 
  • Fast
More Information: 

Size & form

An upright, leafy shrub reaching 3 to 4 feet high with a suckering root system that forms large colonies.

Tree & Plant Care

Best in full sun in wet to moist conditions.
Soil pH adaptable but best in acidic sandy soils.
Prune to control size.

Disease, pests, and problems

Leaf spots, mildew, chlorotic symptoms in high pH soils

Disease, pest, and problem resistance

Deer

Native geographic location and habitat

C-Value: 9
Found in boggy, acidic soils, in wet prairies and along stream banks and lakes.
Northern Europe and Midwest U.S., including northern IL.

Attracts birds, pollinators, or wildlife

Birds, butterflies and bees

Bark color and texture 

Slender gray twigs covered in whites hairs, older stems are reddish with peeling bark and white lenticels.

Leaf or needle arrangement, size, shape, and texture

Alternate, narrow, lanceolate leaves up to 3 inches long and 1/2 inch wide. Upper surface is a medium green and slightly hairy, underside is densely hairy  and rusty brown.

Flower arrangement, shape, and size

Dense, hairy, terminal clusters (panicles) of pink flowers up to 6 inches long. Each flower has 5 pink petals and pink stamens.

Fruit, cone, nut, and seed descriptions

Upright follicle. Fruit ripens in fall and persist throughout winter.

Spiraea tomentosa (syn. Spiraea tomentosa var rosea) or Hardhack

We do not seem to have this in our living collection.