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Dahlia Red Rock

Dahlia Red Rock
Dahlia

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has only produced one flower! PROMESSE DE FLEURS' RESPONSE: We sincerely apologize as we place great importance on the quality of our plants and their growth. If you encounter any issues, please do not hesitate to contact our Customer Service at 03.61.76.08.10 or via email at serviceclient@promessedefleurs.com and we will proceed with a replacement or refund if necessary.

Florelle LECOQ, 11/10/2016

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More information

This decorative variety bears dark purple spherical flowers with white tips. The flowering period is exceptionally long, accompanying summer perennials and enhancing the garden with vibrant colours for a good part of autumn. Their cut flowers are perfect for creating sumptuous bouquets.
Flower size
10 cm
Height at maturity
1 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 May
Recommended planting time April to May
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Flowering time July to November
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Description

Dahlia 'Red Rock' is a decorative variety that bears dark purple spherical flowers with white tips. These vibrant colours will bring life to the garden throughout summer and well into autumn. This variety will fit perfectly into summer perennial borders. To fully enjoy its flowering, simply choose a sunny location and soil that is not too clayey.

 

 

Dahlias belong to the Asteraceae family and are originally from the high plateaus of Mexico. There are currently thousands of horticultural varieties that have conquered gardens worldwide.

Dahlias are classified according to the shape of their flowers. 'Red Rock' is a spherical-flowered variety classified as a decorative dahlia. In this category, the heads are full and double. The flat or slightly curved ligules overlap in numerous regular rows. In this variety, they are slightly revolute (curved downwards) to form an almost perfect sphere. They are dark purple with cream tips. The shorter central florets form a striated two-tone bud. The dense foliage clump will reach 100cm (39in) in height and 70cm (28in) in width. The highly branched and hollow stems are quite fragile, so it helps to thicken their width to strengthen them. The leaves are opposite and pinnatisect, meaning they are divided into 3 or 5 toothed leaflets. The stems and leaves are of a medium green colour.

It flowers from July to November. Remove faded flowers to encourage new blooms. You can use cut flowers to make colourful bouquets, combining them with other varieties.

 

Dahlias are stars of borders and ornamental gardens, confidently accompanying the most beautiful flowers. However, they are also appreciated alongside vegetable plants. In Mexico, this tuberous plant was first cultivated as a root vegetable for consumption. Its poor taste qualities quickly saw it categorised as an ornamental plant. Since then, the interest in their beautiful exuberance has never waned.

 

Dahlia Red Rock in pictures

Dahlia Red Rock (Flowering) Flowering
Dahlia Red Rock (Foliage) Foliage

Plant habit

Height at maturity 1 m
Spread at maturity 70 cm
Growth rate normal

Flowering

Flower colour red
Flowering time July to November
Inflorescence Flower head
Flower size 10 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Dahlia

Cultivar

Red Rock

Family

Asteraceae

Other common names

Dahlia

Origin

Cultivar or hybrid

Product reference12741

Planting and care

Plant in spring as soon as the last frost has passed. For abundant flowering, plant the tubers in full sun in rich, moist but well-drained soil. Stagnant moisture causes tuber rot. 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. Cover with about 6cm (2in) of soil. At the end of planting, water once abundantly and then repeat this watering regularly during the first 6 weeks to help with rooting. 

Dahlias are sensitive to cold, so they need to be overwintered. Dig the tubers up when the first frost has blackened the foliage. 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 lined with newspaper. Store them in a frost-free, dry, cool, and dark place, such as a garage or attic. In mild regions without frost, or those close to the coast, 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 tall dahlia, with its hollow stems, is not resistant to wind or heavy rain. You can stake it, but this is not particularly aesthetically pleasing. To remove the need for staking, you can pinch the stems early or remove the axial flower buds to spread out the plant's habit, which will improve its resistance to bad weather. This also channels the flow of sap to a single flower, which will become larger and sturdier.   

 

Planting period

Best planting time May
Recommended planting time April to May
Planting depth 7 cm

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 2 per m2
Exposure Sun
Soil pH Any
Soil moisture Moist soil, Well-drained.

Care

Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Very good
Overwinter Needs to be stored
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