Heuchera americana Dales Strain
Heuchera americana Dales Strain
Heuchera americana Dales Strain
Heuchera americana Dales Strain
Heuchera americana Dales Strain
Heuchera americana Dales Strain
Heuchera americana Dale’s Strain
Coral Bells, Alumroot
Beautiful young plant that is already settling in quickly among the other heuchera colours. Incredibly robust plants that dress up shady areas with flair.
Valérie, 01/11/2025
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Description
L’Heuchera americana ‘Dale’s Strain’ est l’une des heuchères les plus intéressantes pour végétaliser les endroits ombragés du jardin. Ses feuilles vert bleuté, parcourues de marbrures argentées et de nervures pourpres, apportent de la lumière sous les arbres et dans les bordures ombragées. Robuste, peu sensible à la chaleur et très résistante au froid, elle supporte mieux les périodes sèches que de nombreuses heuchères horticoles, une fois bien enracinée.
L’Heuchera americana appartient à la famille des Saxifragacées. Cette espèce est naturellement présente du sud-est du Canada jusqu’au centre et à l’est des États-Unis. Elle pousse dans les forêts rocheuses, sur les affleurements et les escarpements ombragés, souvent en terrain acide. 'Dale’s Strain’ est une lignée sélectionnée par le pépiniériste américain Dale Hendricks à partir de semences recueillies dans les montagnes de Caroline du Nord. Elle est multipliée par semis, ce qui explique les légères variations de couleur et de marbrure observées d’une plante à l’autre. Cette vivace forme une rosette dense, haute de 25 à 30 cm pour 45 à 60 cm d’envergure. Ses feuilles longuement pétiolées, larges de 8 à 12 cm, sont arrondies à cordiformes et divisées en lobes peu profonds. Leur fond vert à vert bleuté est irrégulièrement lavé d’argent, de gris et parfois de crème, tandis que les nervures prennent des nuances pourpres, brun rouge ou presque noires. Le feuillage est semi-persistant : il reste visible durant les hivers doux, mais peut être en partie endommagé par les fortes gelées. En mai et juin, de fines hampes s’élèvent jusqu’à 50 ou 60 cm. Elles portent des panicules légères composées de petites fleurs en clochettes blanc crème, parfois nuancées de rose. Discrète, cette floraison attire de petits insectes pollinisateurs. Cette heuchère tolère une terre un peu sèche à l’ombre, mais souffre dans un sol constamment détrempé ou sous un soleil estival brûlant. Très rustique, elle résiste à des températures proches de –28 °C dans une terre correctement drainée.
Cette heuchère ‘Dale’s Strain’ s’utilise en lisière de sous-bois, dans une rocaille d’ombre, dans une bordure un peu ombragée ou sous des arbres et des arbustes caducs. Plantée en groupe ou en ruban, elle forme un couvre-sol régulier et attrayant une bonne partie de l'année. Dans un décor inspiré des sous-bois nord-américains, cette heuchère peut côtoyer la fougère de Noël Polystichum acrostichoides, l’Asarum canadense, le phlox divariqué ‘Clouds of Perfume’ et la jacinthe de Virginie, Mertensia virginica. Leurs feuillages et leurs floraisons printanières accompagnent son feuillage marbré d'argent dans un jardin d’ombre ou d’inspiration anglaise.
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Heuchera americana Dales Strain in pictures
Flowering
Foliage
Plant habit
Botanical data
Heuchera
americana
Dale’s Strain
Saxifragaceae
Coral Bells, Alumroot
Cultivar or hybrid, North America
Planting and care
Heuchera americana ‘Dale’s Strain’ is planted in spring or early autumn, in partial shade or light shade. A position receiving morning sun is favourable to it, but afternoon sun does not suit it. It grows in humus-bearing, moist but well-drained, acid to neutral soil. The collar is placed at soil level, without being buried, and the young plants are spaced 40 to 50 cm apart. Regular watering is beneficial during the first year; afterwards, this heuchera tolerates short dry spells in shade. A mulch of dead leaves or mature compost maintains humus and limits drying out. As the stump tends to rise over the years, the clump is divided and replanted every three or four years, keeping its collar just at soil level.
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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