Astilbe arendsii Diamant
Astilbe arendsii Diamant
Astilbe x arendsii Diamant
Arendsii Astilbe, False Goat's Beard, False Spirea
Beautiful plant that has found its place, I can't wait to see it grow in a kind of small forest at the end of our garden.
Nath44, 23/04/2025
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Description
Perennial plants for heavy and moist soil, astilbes are essential plants on the banks of a pond and in marshy areas. They prefer locations which are partly shaded or without direct sunlight. They flower from June to July, filling a gap when spring blooms come to an end and summer blooms are just beginning. Astilbes bear panicles of very colourful flowers, pink, white or red depending on the variety.
Astilbe x arendsii Diamant brightens up shady gardens. This hybrid perennial blooms from July to August with large feathery panicles of cream-white flowers. Its green foliage is deciduous.
Also known as Arends' astilbe, it can reach a height of up to 80 cm (32in) when fully grown. You can plant it in a damp bed, in the shade, on the banks of a pond or pool. It is interesting in bouquets, and the flower stalks can also be dried.
Astilbe arendsii is often associated with Japanese anemones, hostas, Siberian irises, ligularias, ferns, heucheras, rodgersias, and generally with all plants in a moist environment.
Astilbe arendsii Diamant in pictures
Flowering
Foliage
Plant habit
Botanical data
Astilbe
x arendsii
Diamant
Saxifragaceae
Arendsii Astilbe, False Goat's Beard, False Spirea
Cultivar or hybrid
Planting and care
Astilbe thrives in partial shade, you can plant it in gentle sunlight, but avoid the hot midday sun. It is a trouble-free plant. Plant it in spring or autumn in moist, well-drained soil, rich in organic matter. It prefers fertile soils. You can put it in a marshy area but not in chalky soil as it is susceptible to drying out. To plant, work the soil well in an area of 20 cm (8in) and place a base fertiliser at the bottom of the planting hole. Remove your plant from its pot and position covering the top of the root ball with 3 cm (1in) of soil. Then fill in and water thoroughly to remove any air pockets. In dry weather, water regularly for a few weeks to aid rooting. Astilbe requires very little maintenance, just keep the soil moist and add compost and fertilizer in spring. In winter the flowers and young foliage can be damaged by spring frosts. After flowering, cut back the flower stems to encourage the foliage. In November, cut the plants back to around 10 cm (4in). Resistant to slugs, it can be susceptible to powdery mildew and fungal spots.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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