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Dahlia Black Jack
Dahlia Black Jack
Dahlia Black Jack
Dahlia Black Jack
Dahlia Black Jack
Dahlia Black Jack
Dahlia
I didn't have any sprouts, so no flowers. The bulbs didn't recover at all.
Valerie, 14/02/2020
Order in the next for dispatch today!
Dispatch by letter from €3.90.
Delivery charge from €5.90 Oversize package delivery charge from €6.90.
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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.
From €5.90 for pickup delivery and €6.90 for home delivery
Express home delivery from €8.90.
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Description
Dahlia 'Black Jack' is a semi-cactus variety. The dark red flowers have a shape between decorative and cactus. They bloom from July to October.
This perennial has swollen tuberous roots. Gathered in bundles, these tubers produce upright, hollow, and branched stems, bearing compound leaves that are odd-pinnate, with rounded leaflets. It develops strong, fleshy stems, 90 to 120cm (35 to 47in) tall. They are topped with dark red flowers with wide, tapering and lacerated ligules at the ends, measuring 15 to 20cm (6 to 8in) in diameter.
Dahlia 'Black Jack' grows in rich, clayey soil that is deeply worked. It prefers warm and sunny conditions, sheltered from prevailing winds. It does not thrive in poor, sandy soils.
Dahlia 'Black Jack' is perfect in mixed flower beds with other varieties. The flowers are also ideal for making bouquets.
Tips: when planting, consider the dimensions of the dahlia when designing your flower beds.
Dahlia Black Jack in pictures
Plant habit
Flowering
Foliage
Botanical data
Dahlia
Black Jack
Asteraceae
Dahlia
Cultivar or hybrid
Planting and care
Plant from mid-April to early May, at a depth of 10 to 15cm (4 to 6in) and with a spacing of 60cm (24in). Always provide support stakes and loosely tie the young stems. Add slow-release compost or organic fertiliser during planting, and liquid fertiliser once a month during the growing season. Water without wetting the foliage. There is no need to remove buds on this variety. Treat against aphids and slugs. Dig up the tubers before the frost, cutting the stems to 15cm (6in) from the stump. Store them in a cool, well-ventilated, and dark place that is not too humid. Transplant in early May once the risk of frost has passed.
Planting period
Intended location
Care
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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).
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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.