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Collector's item

Astilbe rivularis Grandiflora

Astilbe rivularis Grandifloraivularis
Astilbe des rives

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More information

Astilbe rivularis Grandiflora has white plumes over 1.50m (5ft) high. It is a perennial for partial shade and moist soil.
Height at maturity
1.70 m
Spread at maturity
50 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -23°C
Soil moisture
Moist soil, Damp soil
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Recommended planting time February to May, September to November
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Flowering time July to August
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Description

Astilbe rivularis 'Grandiflora' can reach a spectacular height of 1.70m (6ft) under good conditions.

Its floral spikes form airy, slightly arched cream-white panicles to rival the beauty of goat's beard (Aruncus dioicus). Fresh or dried, the flowers of Astilbe rivularis are appreciated for their long life in bouquets.

Its finely divided green foliage is deciduous.

Astilbes are perennials that thrive in heavy, moist soils, essential along the edges of a pond and in marshy areas. They prefer partially shaded and bright locations without direct sunlight. They bloom from June to July, a transitional period where spring flowers are finishing and summer flowers just beginning. Astilbes produce colourful panicles of flowers, ranging from pink to white or red, depending on the variety.

 

Astilbe rivularis thrives in the same conditions as Siberian iris, hostas, ligularias, knotweeds, or loosestrifes.

Astilbe rivularis Grandiflora in pictures

Astilbe rivularis Grandiflora (Flowering) Flowering

Flowering

Flower colour white
Flowering time July to August
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.70 m
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Astilbe

Species

rivularis

Cultivar

Grandifloraivularis

Family

Saxifragaceae

Other common names

Astilbe des rives

Origin

Cultivar or hybrid

Other Astilbe - False Goatsbeard

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Planting and care

Astilbe primarily thrives in partial shade. You can plant it in gentle sunlight but avoid the hot midday hours. Plant it in spring or autumn in cool, moist, fertile soil, rich in organic matter. You can plant it in a marshy area. During dry weather, water regularly for a few weeks after planting to aid root development. Astilbe requires very little maintenance, just keep the soil moist and add compost and organic fertiliser in spring.

Planting period

Recommended planting time February to May, September to November

Intended location

Suitable for Meadow, Pond edge
Type of use Back of border
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Clayey (heavy), Silty-loamy (rich and light)
Soil moisture Moist soil, Damp soil, rich, humus-bearing, and clayey

Care

Pruning instructions Prune the faded flowers to promote better foliage development. The floral stalks can be left in place to decorate the garden during the winter season, simply remove them the following spring by cutting back to 10 cm (4in). Avoid digging near these plants, as the rootstocks develop on the surface. These flowers are disease-resistant and rarely attacked by insects. While slugs ignore them, they can be susceptible to powdery mildew and fungal spots.
Pruning Pruning recommended once a year
Pruning time February to April
Overwinter Can be left in the ground

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