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False Spirea, Japanese Astilbe, Star Astilbe
Astilbe simplicifolia 'Dunkellanchs'

Family: Saxifragaceae (saks-ih-frag-AY-see-ee) (Info)
Genus: Astilbe (a-STIL-bee) (Info)
Species: simplicifolia (sim-plik-ee-FOH-lee-uh) (Info)
Cultivar: Dunkellanchs

Category:

Perennials

Height:

12-18 in. (30-45 cm)

Spacing:

15-18 in. (38-45 cm)

Hardiness:

USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

Sun Exposure:

Sun to Partial Shade

Danger:

Unknown - Tell us

Bloom Color:

Pink

Bloom Time:

Late Spring/Early Summer

Mid Summer

Foliage:

Herbaceous

Other details:

Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing the rootball

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On Aug 1, 2002, smiln32 from Oklahoma City, OK (Zone 7a) wrote:

Be sure to cut back faded flower stalks. Extra water may be needed in dry periods. Divide after 3-4 years in spring or fall. Astilbe requires a lot of nutrients, so give it some fertilizer at least once per growing season.