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Dahlia Myrthe

Dahlia Myrthe
Dahlia

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A flamboyant colour adorns the bright orange flowers bordered and striated with golden yellow of this decorative dahlia. Of modest size (12cm (5in)), but visible from afar, they are borne by a sturdy plant with dark stems reaching a height of 1.10m (4ft). They bloom from July until the first frost. Stunning in flower beds, these flowers are long-lasting in bouquets.  
Flower size
12 cm
Height at maturity
1 m
Spread at maturity
60 cm
Exposure
Sun
Hardiness
Hardy down to -4°C
Soil moisture
Moist soil
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Best planting time March to April
Recommended planting time March to May
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Flowering time July to November
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Description

The 'Myrthe' Decorative Dahlia bears modest-sized flowers, but brilliantly coloured in orange and yellow. A colour that fades somewhat as the flower ages, transforming the plant into a resplendent bouquet. The flowers bloom at the end of dark stems, on a well-branched vegetation that does not sag. Radiant in flower beds, these flowers are very long-lasting in bouquets. Perfect with grass flowers and purple foliage.

Dahlias are tuber plants from the large family of Asteraceae, originally from the high plateaus of Mexico. Currently, the thousands of horticultural varieties obtained by Man have invaded, to our great pleasure, gardens around the world. Dahlias are classified based on the shape of their flower. 'Myrthe' is classified in the category of Ornamental Dahlias with small flowers. In this group, the "petals" or coloured ligules of the head are arranged regularly in a spiral, they can be curved towards the stem or fringed for example. In this variety, the heads measure only 12cm (5in) in diameter and their ligules are rather large, widely ovate, arranged in an orderly manner. Flowering occurs from July to October-November. Depending on the ripeness of the flower, the orange colour bordered and streaked with yellow of this variety can take different shades, more or less vivid, the centre of the inflorescence always leaning towards golden yellow. The plant will reach about 1.10m (4ft) in height and 50 to 60cm (20 to 24in) in width, the habit is bushy and erect. The very branched stems are hollow and the leaves are opposite, compound, meaning they are divided into 3 or 5 leaflets, which form very denticulate lobes. The leaves are fairly dark green and the stems, particularly strong, are tinged with dark purple, almost brown.

To promote flowering and extend the flowering period, take care to cut faded flowers. Even better, regularly compose attractive coloured bouquets by combining various varieties. Decorative Dahlias pair well with Gauras, Cleomes, and Statices which lighten their generous silhouette. The captivating flowers of 'Myrthe' also allow beautiful combinations in floral compositions, with yellow, orange, red, or purple varieties. The medium size of this variety makes it suitable for the centre of mixed flower beds, to structure an ensemble composed of shrubs with colourful foliage (Physocarpus, Compact Winged Euonymus, Loropetalum...) and lower plants. Also consider grasses (Briza, small Miscanthus, Stipa, Eragrostis) which take on beautiful colours in autumn.

As a star plant in ornamental gardens, Dahlias are undoubtedly beautiful flowers, they are impeccable in flower beds, but can also enhance the vegetable garden. In Mexico, this tuberous plant was first cultivated as a root vegetable for consumption. Its poor taste quickly assigned it the status of an ornamental plant.

Dahlia Myrthe in pictures

Dahlia Myrthe (Flowering) Flowering

Plant habit

Height at maturity 1 m
Spread at maturity 60 cm
Growth rate fast

Flowering

Flower colour two-tone
Flowering time July to November
Inflorescence Flower head
Flower size 12 cm
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Deciduous
Foliage colour dark green

Botanical data

Genus

Dahlia

Cultivar

Myrthe

Family

Asteraceae

Other common names

Dahlia

Origin

Cultivar or hybrid

Product reference18629

Planting and care

The decorative Dahlia 'Myrthe' 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 frosts are over, rich, fresh, and well-drained soils are perfect. However, stagnant humidity 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 crushed horn or dehydrated blood. Place your tuber and crumble the soil to fill without air pockets. Your dahlia should be covered with about 6cm (2in) of soil. At the end of planting, water once abundantly and then regularly renew this watering during the first 6 weeks to help with rooting. 

Dahlias are sensitive to cold, so they need to be overwintered. In November, the first frosts turn the foliage black, which is the time to dig them up. Carefully remove the tubers from the ground. 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 in a frost-free, dry, cool, and dark place, such as a frost-free garage or an attic. In southern 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 ground with a layer of leaves or straw as protection. 

This tall Dahlia, with its hollow stems, is still sensitive to strong winds or heavy rains. To overcome this inconvenience, you can stake it, but let's admit that 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 are directing the flow of sap to a single flower, which will become larger and stronger.

Planting period

Best planting time March to April
Recommended planting time March to May
Planting depth 10 cm

Intended location

Suitable for Meadow
Type of use Border, Container, Vegetable garden
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, Fertile, well-drained.

Care

Pruning instructions Remove faded flowers regularly to encourage flowering.
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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