Astilbe Color Flash
Astilbe Color Flash
Astilbe x arendsii Colour Flash
Arendsii Astilbe, False Goat's Beard, False Spirea
Received as bare roots, it's always a bit scary to plant them directly in the ground since they seem so fragile, so I potted them first—and wow, what a comeback! The foliage is a stunning burgundy red ????
Sandra, 30/04/2025
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Description
Astilbe 'Color Flash', also known as Astilbe 'Beauty of Ernst', is a new hybrid variety as attractive for its variegated green and burgundy-red foliage, which takes on magnificent shades in autumn, as it is for its large panicles of small pink-red to beige flowers in summer. This hardy perennial astilbe tolerates full sun in consistently moist soil. It is ideal for adding a touch of charm to wet areas in the garden or for adorning a large container, with careful watering. Its feathery inflorescences remain very attractive in dried bouquets.
The Genus Astilbe belongs to the Saxifragaceae family, and results from multiple crossbreeding between different species (A. astilboides, A. davidii, A. japonica, A. thunbergii.), producing numerous horticultural hybrids selected for the beauty of their flowers. 'Color Flash' is among the latest cultivars chosen not only for their flowering, but also their original and colourful foliage. It is a rhizomatous and stoloniferous perennial plant, forming upright and bushy, spreading tufts. The plant will reach 60 cm (24in) high when in flower, 40 cm (16in) for the foliage, spreading over 40 to 50 cm (16 to 20in). It is a perennial with good longevity, with deciduous compound foliage composed of toothed leaflets, initially acid green in spring and particularly appealing with their glossy appearance. The leaves gradually colour over the weeks with dark red to purple spots. Towards the end of the season, the foliage has beautiful golden, orange, and rust tones. Flowering occurs from late spring to early summer, in the form of feathery panicles 20 to 25 cm (8 to 10in) long, composed of tiny dark pink to light pink flowers, fading to beige-pink before wilting.
Astilbe 'Color Flash' can easily be grown in containers, flower beds, or borders or as cut flowers for drying. It is ideal near ponds and streams, and also thrives at the edge of woodland, under trees, or at the base of a hedge, in consistently moist soil. Pair them with Hostas, Ferns, Arums, Rodgersia, or Goat's Beard. These plants can be forced in a greenhouse for early flowering.
Arends' astilbe hybrids present less risk of allergies than other varieties.
Astilbe Color Flash in pictures
Flowering
Foliage
Plant habit
Botanical data
Astilbe
x arendsii
Colour Flash
Saxifragaceae
Arendsii Astilbe, False Goat's Beard, False Spirea
Beauty of Ernst'
Cultivar or hybrid
Planting and care
Plant Astilbe Colour Flash in moist to damp, rich, neutral to acidic soil. This hybrid cannot tolerate drought. The plant adapts well to clay soils if they are healthy and fertile. Note that Astilbes do not tolerate being flooded in winter. Plant Astilbe in partial shade or in a sunny but not scorching location: in nature, these plants grow in moist woodlands. They will need daily watering in hot summers. Prune faded flowers to promote better foliage development. Alternatively, leave the flower stalks in place to decorate the garden during the winter season, simply remove them the following spring. Avoid digging near these plants, as the rootstocks develop near the surface. These plants are resistant to diseases and rarely attacked by insects.
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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