Family: Saxifragaceae

Scientific Name: Astilbe x ardensii Avalanche

Common Name: Avalanche Astilbe

DescriptionAn Astilbe with white flowers
Plant TypePerennials Hardy
Hardiness Zone4-8
SunlightPrefers semi-shaded sites, will tolerate more light if the soil is kept moist.
MoistureNeeds moist soil. Plants growing in dry conditions will be small, few blooms and tend to dry up during the hotter days in the summer
Soil & Siterich, humusy moist well-drained soils
Flowersbranching panicles of white flowers
Leavesdark green, ternately compound and the leaflets are coarsely serrated, dissected foliage is an attractive feature of the plant
MaintenanceDivision of the clumps every 2-3 years will help to maintain the vigor of the plant. Astillbe are heavy feeders and need to be fertilized every year in the spring and also in the early fall. Some of my Astilbe tend to heave in the winter. In the spring I cover the exposed roots with soil, mulch or dug them in. Be careful since many Astilbe are easily pulled out of the soil
Misc FactsGeorge Arends of Germany was one of the first to create new varieties of Astilbe (x ardensii) which lead to the plants popularity
Author's NotesI have a group of Astilbe in a 1/2 to 3/4 day full sun for over 10 years and they are a show stoppers when blooming. To achieve this they are growing in a bed that is raised a few inches and the soil is naturally constantly wet. The main factors to get maximum performance are proper soil moisture, division and fertilizing.
Notes & Reference#04-Herbaceous Perennial Plants (Allan Armitage), #40-Herbaceous Ornamental Plants (Steven Stills), #54-The Well Tended Garden (DiSabato-Aust)
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