Dahlia Blue Wish
Dahlia Blue Wish
Dahlia Blue Wish
Dahlia
Bulb received in perfect condition.
MB, 04/03/2026
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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 Decorative Dahlia Blue Wish is a very recent variety, not really blue, but which comes even closer to this rare bluish shade of Dahlia flowers. Its large fully double flowers are white with purple tips when they first open, then they gradually turn into a more uniform lilac colour over the course of a few days, creating a beautiful two-tone effect. The plant, vigorous and floriferous, forms a large flowering bush from summer until the first frost. Its flowers, carried on long stems, look stunning when planted in the background of a flower bed with purple, white, or various shades of pink flowers. They are also perfect for creating generous bouquets.
Dahlias are tuberous plants belonging to the large Asteraceae family, originally from the high plateaus of Mexico. Currently, the approximately 25,000 horticultural varieties created by humans have invaded gardens all over the world, much to our delight. Dahlias are classified according to the shape of their flowers. 'Blue Wish' belongs to the category of Decorative Dahlias. In this group, the coloured ligules of the head are arranged regularly in a spiral, and can be curved towards the stem or even fringed. In this variety, the heads are composed of numerous ligules, with those on the periphery being almost flat and those in the centre distinctly recurved. Their colour ranges from white with a hint of violet to almost uniform lavender mauve. They bloom from July to September-October. The plant reaches a height of 1.20m (4ft) and a width of 60cm (24in), with a bushy and upright habit. The highly branched stems are hollow and the leaves are opposite, pinnately compound, meaning they are divided into 3 or 5 leaflets, which have very denticulate lobes. The leaves and stems are dark green.
To encourage repeat flowering and extend the flowering period, make sure to remove faded flowers. Even better, regularly create attractive colour combinations by combining different varieties. The tall stature of this variety makes it suitable for the back of perennial flower beds, to structure a composition made up of flowering shrubs and shorter perennials. The flowering of Echinaceas is perfect when accompanied by Dahlias, as they bloom simultaneously, as well as perennial salvias or asters, for example. Also consider ornamental grasses (Miscanthus saccharifolius, Stipa arundinacea, Eragrostis trichodes) which take on beautiful colours in autumn.
A star plant in ornamental gardens, Dahlias are undoubtedly very beautiful flowers. They are perfect in flower beds, but can also enhance a vegetable garden. In Mexico, this tuber was initially cultivated as a root vegetable for consumption. Its poor taste quickly relegated it to the status of an ornamental plant. Since then, the interest in their beautiful exuberance has never waned.
Dahlia Blue Wish in pictures
Plant habit
Flowering
Foliage
Botanical data
Dahlia
Blue Wish
Asteraceae
Dahlia
Cultivar or hybrid
Planting and care
The decorativ Dahlia 'Blue Wish' is easy to grow in all regions. To ensure abundant flowering, it is good to follow a few simple rules. Plant the tubers in full sun as soon as the last frost has passed. Rich, damp, well-drained soil is perfect. However, waterlogging would promote tuber rot. Feel free to amend the soil with compost and sand if necessary. Work the soil deeply and enrich it, for example, with bonemeal. Place your tuber and crumble the soil well to fill without air pockets. Your dahlia should be covered with about 6 cm (2in) of soil. At the end of planting, water generously once and then repeat this watering regularly during the first 6 weeks to aid in rooting.
Dahlias are sensitive to cold, so they need to be overwintered. In November, the first frosts cause the foliage to turn black, which is the time to dig them up. Carefully remove the tubers from the ground and shake off 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 crate on newspaper. Store them in a frost-free, dry, cool, and dark place, such as a garage or attic. In warmer regions, close to the coast, where there are only a few days of frost per year, it is possible to leave them in place. In this case, simply cover the soil with a layer of leaves or straw for protection.
This tall Dahlia, with its hollow stems, does not withstand wind or heavy rain well. To overcome this drawback, you can stake it, but let's agree, it's not very aesthetic. On the other hand, by pinching the stems early or removing the axial flower buds, you will spread out the plant's habit, which will offer more resistance to bad weather. At the same time, you channel the flow of sap to a single flower, which will become larger and stronger.
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).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.
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