University of Illinois Extension
University of Illinois Extension - Selecting Shrubs for Your Home
http://www.urbanext.uiuc.edu/shrubselector
Japanese Spirea
Spiraea japonica
Japanese Spirea, flowers of the cultivar ‘Neon Flash’
Size:
Size: small
Small

Medium

Large
Exposure/ Light Requirements:
Full Shade not required.
Full Shade
Full Sun required.
Full Sun
Partial Sun/Shade not required.
Partial Sun/Shade
Hardiness Zone: 4 - 8 
Mature Height: 4-5 Feet
Mature Width: 4-5 Feet
Features: Clusters of pink flowers in early summer.
Culture: Full sun; moist, well drained soils are best, but tolerates dry sites; tolerates neutral soil pH (highly alkaline soils may lead to chlorosis).
Cultivars:
  • 'Gold Mound'- Golden yellow foliage most of the season, autumn color is orange red, pink flowers.
  • 'Little Princess' - 2½ feet tall, deep pink flowers.
  • 'Mertyann' (Dakota Goldcharm®)- 12-15 inches tall, new foliage branze, turning to yellow, pink flowers.
  • 'Neon Flash' - 3 feet tall, new leaves emerge reddish and change to dark green, red flowers.
  • 'Shibori' ('Shirobana') - 2-3 feet tall, white, pink and deep pink flowers all on the same plant.
Mature Form: Rounded
Native To: Japan and China
Soil Conditions:
Soil condition: DryDry
Soil condition: Moist, Well-DrainedMoist, Well-Drained
Wet
Tolerance:
Alkaline Soil
Tolerance: Dry SitesDry Sites
Salt
Soil Compaction
Wet Sites
Tolerance: WindWind
Uses:
Barrier
Use for: Border.Border
Use for: Foundation.Foundation
Hedge
Use for: Massing.Massing
Naturalizing
Screen
Specimen
Foliage Color: Green
Yellow
 
Fall Foliage Color: Green
 
Additional Notes: Spiraea japonica is one of the parent plants of Spiraea x bumalda. Some of the cultivars noted here may be found sold as cultivars of both species.

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