Dahlia Hartenaas
Dahlia Hartenaas
Dahlia Hartenaas
Dahlia
Did not shoot.
Celine, 06/10/2024
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This plant carries a 6 months recovery warranty
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
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Description
The Dahlia 'Hartenaas' is a small variety, as romantic as a Japanese anemone, whose pink flowering adorned with an adorable collar exudes excellent poetry. It offers from summer to frost semi-double flowers, formed by medium pink petals, edged and pointed with a lighter pink, sometimes white, surrounding a central crown of slightly lighter crumpled petals centred on a solar heart—a lovely variety to plant in borders or romantic borders.
Dahlias belong to the Asteraceae family and are originally from the high plateaus of Mexico. Currently, some 25,000 horticultural varieties obtained by humans have invaded, to our greatest pleasure, gardens worldwide.
The 'Collerette Hartenaas' variety is a semi-dwarf Dahlia with ramified vegetation, which will not exceed 60 cm (24in) in height by 50 cm (20in) in width. It is also classified among the collarette Dahlias, a horticultural category defined by the shape of the flower. In this group, the coloured ligules of the capitulum are regularly arranged in a crown around a collar of tiny petals surrounding the central disk. The flowers of 'Hartenaas' show outer ligules of a fresh pink variegated with pale pink, and those in the centre are barely lighter. The flower's large, golden, rounded heart makes it even brighter. Flowering occurs from July to October, and the capitula press against each other on abundant foliage. The habit is bushy and compact, requiring no staking. The branched stems are hollow,w and the leaves are opposite, pinnately lobed, meaning they are divided into 3 or 5 very toothed lobes. The leaves and stems are medium green.
To promote flowering again, cut off faded flowers, or even better, regularly make large colourful bouquets by combining themhem with other varieties. 'Hartenaas' particularly pairs well with blue or white flowers and the purple foliage of heucheras (Heuchera XXL). In the front of borders, this Dahlia will form colourful spots in the company of Rudbeckia hirta, Salvia splendens, or Echinaceas, for example, which bloom simultaneously. It will also harmonize well with Cleomes or Asters. This modest-sized variety is also suitable for container cultivation, making decorating the terrace or balcony easy.
A star plant in borders and kitchen gardens, Dahlias confidently accompany the most beautiful flowers but are also appreciated alongside vegetable plants. In Mexico, this tuberous plant was first cultivated as a root vegetable for consumption. But its poor taste qualities assigned it to the rank of ornamental plant. Since then, interest in their beautiful exuberance has never waned.
Dahlia Hartenaas in pictures
Plant habit
Flowering
Foliage
Botanical data
Dahlia
Hartenaas
Asteraceae
Dahlia
Cultivar or hybrid
Planting and care
The Dahlia 'Collerette Hartenaas' is easy to grow in all regions. For a bountiful flowering, following a few simple rules is good: plant the tubers in a sunny location after the last frost; rich, fresh, and well-drained soils are perfect. However, stagnant moisture would promote tuber rot. Do not hesitate to amend the soil with compost and sand if necessary. Work the soil deeply and enrich it, for example, with blood, fish and bone. Place your tuber and crumble the soil well to close without air pockets. Your dahlia should be covered with about 6 cm (2in) of soil. At the end of planting, water once abundantly and then regularly water during the first six weeks to help with rooting. Dahlias are sensitive to cold; they must be overwintered.
In November, the first frosts blacken the foliage; it is time to dig them up. Carefully unearth the tubers. Remove as much soil as possible. Let the foliage dry so that the tubers can replenish their reserves. Then cut the stems to 10 cm (4in). Spread your bulbs in a box of newspaper. Store them away from frost in a dry, cool, and dark place, such as a frost-free garage or attic. In milder regions, experiencing only a few days of frost per year, it is possible to leave them in place. In this case, cover the ground with a carpet of leaves or straw for protection.
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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