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Scientific Name:
Spiraea nipponica
Pronunciation:
spy-REE-uh nih-PON-ih-kuh
Common Name:
snowmound spirea
Family Name:
Rosaceae
Plant Type:
Shrub - deciduous
Key ID Features:
Leaves obovate, most 3-5cm long with a few teeth near tip; flowers white in mass along branches, May-June.

Habit:
Arching, Spreading, Upright
Form:
Vase
Texture:
Medium - fine
Mature Height:
0.7 - 1.3m
Mature Spread:
1.0 - 1.5m
Growth Rate:
Fast
Origin:
Garden origin, S.E. Asia / Japan / China (Japan)
Hardiness Rating:
Zone 4: (-34 to -29 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Water Use:
Low
Landscape Uses:
Mixed shrub border, Spring interest
Additional Info:
Google. Cultivars shown or on campus include S. 'Snowmound' (Award of Garden Merit, RHS), and S. 'Halward's Silver' (more dense and compact than cv. Snowmound).

Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Soft flexible
Surfaces:
Glabrous
Colour in Summer:
Dark-green
Colour in Fall:
Yellow
Shapes:
Obovate
Apices:
Rounded
Bases:
Attenuate
Margins:
Serrate

Inflorescence Type:
Cyme, Floriferous, Corymb-like
Flower Morphology:
Flowers perfect
Number Of Petals:
5
Corolla Shape:
Rotate/stellate
Ovary Position:
Superior
Colour (petals):
Showy, White
Flower Scent:
None
Flower Time at Peak:
May, Jun

Fruit Type:
Aggregate fruit, Follicle
Fruit Colour:
Green, Brown
Fruiting Time:
Jul, Aug
Additional Info:
Not showy, Persistent,

Bark Morphology:
Exfoliating, Prominent lenticels
Bark or Stem Colour:
Brown
Propagation:
Seed, Cuttings
Pest Susceptibility:
Aphids or adelgids (Pest resistant, Disease resistant)

Course(s):
  • HORT 2355
Location(s):
  • (BUG)  BUG garden : cv. Halward's Silver
  • (GAZ)  GAZebo
  • (GAZE)  GAZebo East : cv. Snowmound - under catalpa
  • (HPZ)  Horticulture PlaZa
  • (ONE)  Overpass North side East : 484 - cv. Snowmound
  • (TFL)  Turf Field Lab
  • (TFLE)  Turf Field Lab East : not a cv.?
Location Map