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Dahlia All That Jazz

Dahlia All That Jazz
Dahlia

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A Dahlia prized for its warm and changing colour. Its 14cm (6in) flower displays a gradient ranging from plum in the centre to a coppery pink-red tipped with cream. The plant forms a large bushy clump of 1.20m (4ft) and blooms late in the season, with abundant dark green foliage.
Flower size
14 cm
Height at maturity
1.20 m
Spread at maturity
70 cm
Exposure
Sun
Hardiness
Hardy down to -4°C
Soil moisture
Moist soil
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Best planting time April
Recommended planting time March to May
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Flowering time July to November
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Description

The 'All That Jazz' Decorative Dahlia is a must-have. Its colour is rare, with a gradient ranging from a plum centre to a coppery pink and creamy tips. In summer, it is more red, while in autumn it leans towards peach. Its large double globular flowers are elegantly formed. The plant forms a large bushy clump and blooms late into the season, with abundant dark green foliage.

Dahlias are part of the large Asteraceae family, originally from the high plateaus of Mexico. Currently, the thousands of horticultural varieties created by man have invaded gardens worldwide, much to our delight. Dahlias are classified based on the shape of their flowers. All That Jazz is classified in the category of Ornamental Dahlias. In this group, the coloured ligules of the head are arranged regularly in a spiral, and can be curved towards the stem or slightly curled, for example. In this variety, the heads are approximately 14cm (6in) in diameter and the ligules are wide, slightly flattened, and concave. Flowering occurs from mid-July to October. The plant reaches approximately 1.20m (4ft) in height and 70cm (28in) in width, with a bushy and upright habit. The highly branched stems are hollow, and the opposite leaves are divided into 3 or 5 leaflets, which are finely denticulate. The foliage is dark green.

To promote continuous flowering and extend the blooming period, make sure to remove faded flowers. Even better, regularly create attractive colourful bouquets by combining various varieties. Plant this 'All That Jazz' Dahlia in the middle or back of a flowerbed alongside red, purple, orange, and cream-coloured blooms. For example, try mauve asters, Verbena bonariensis, daylilies like 'George Cunningham' or 'Margaret Perry'. The blooming of sunflowers, Cosmos, and Echinaceas beautifully complement the blooming of Dahlias in summer and early autumn. Also, consider the vibrant spikes of ornamental grasses during this time of year.

As stars of cultivated gardens, Dahlias are undoubtedly beautiful flowers, perfect in flowerbeds, and can also enhance vegetable gardens. In Mexico, this tuberous plant 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 All That Jazz in pictures

Dahlia All That Jazz (Flowering) Flowering

Plant habit

Height at maturity 1.20 m
Spread at maturity 70 cm
Growth rate normal

Flowering

Flower colour orange
Flowering time July to November
Inflorescence Flower head
Flower size 14 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Dahlia

Cultivar

All That Jazz

Family

Asteraceae

Other common names

Dahlia

Origin

Cultivar or hybrid

Product reference18600

Planting and care

The 'All That Jazz' decorative Dahlia is easy to grow in all regions. For 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, fresh, and well-drained soil is perfect. However, stagnant moisture would promote the rotting of the tubers. Do not hesitate to amend the soil with compost and sand if necessary. Work the soil deeply and enrich it, for example, with crushed horn or dehydrated blood. Place your tuber and crumble the soil well to fill without air pockets. Your dahlia should be covered with about 6cm (2in) of soil. At the end of planting, water once abundantly, then repeat this watering regularly during the first 6 weeks to help with rooting.

Dahlias are sensitive to cold, they need to be overwintered. In November, the first frost blackens the foliage, it is time to dig them up. Carefully remove 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 10cm (4in). Spread your bulbs in a box on a newspaper. Store them away from frost in a dry, cool, and dark place, such as a frost-free garage or attic. In southern regions, close to the coast, where there are few days of frost per year, it is possible to leave them in place. In this case, simply cover the ground with a carpet of leaves or straw for protection.

This large Dahlia, with its hollow stems, is not resistant to wind or heavy rain. To overcome this inconvenience, you can stake it, but let's agree, it is not very aesthetic. On the other hand, by pinching the stems early or removing the axial flower buds, you will spread out the habit of the plant, which will offer more resistance to bad weather. At the same time, you channel the flow of sap to a single flower that will become larger and sturdier.

Planting period

Best planting time April
Recommended planting time March to May

Intended location

Suitable for Meadow
Type of use Border
Hardiness Hardy down to -4°C (USDA zone 9b) Show map
Ease of cultivation Amateur
Planting density 5 per m2
Exposure Sun
Soil pH Any
Soil moisture Moist soil

Care

Pruning instructions Remove the faded flowers regularly.
Pruning Pruning recommended once a year
Pruning time July to September
Soil moisture Moist soil
Disease resistance Very good
Overwinter Needs to be stored

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