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Dahlia Mondriaan

Dahlia Mondriaan
Dahlia

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This dahlia bears 12cm (5in) flowers, semi-double, with a light yellow colour washed with pink on the outer petals. They bloom at the end of stems measuring 85-90cm (34-35in) in height. The plant, bushy in habit, blooms from July until frost, and its flowers are very long-lasting in bouquets.  
Flower size
12 cm
Height at maturity
87 cm
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

Dahlia Mondriaan is a decorative dahlia with small, semi-double flowers that evoke water lilies in soft shades of yellow and pink. The flowers are carried well above the foliage on sturdy, not very tall stems. This beautiful flowering can be enjoyed from July until the first frost, both in borders and in bouquets.

Dahlias are tuberous plants belonging to the large family of asters, originally from the high plateaus of Mexico. Nowadays, the thousands of horticultural varieties created by humans have invaded gardens all over the world, much to our delight. These tuberous plants are not very hardy. Dahlias are classified according to the shape of their flowers. 'Mondriaan' is classified in the category of decorative dahlias. In this group, the colourful ligules of the head are arranged regularly in a spiral, they can be curved towards the stem or curled, for example. In this variety, the heads measure about 12cm (5in) in diameter and their ligules are widely oval, slightly pleated, almost flat. The flowering takes place from July to October-November. Depending on the ripeness of the flower, the light yellow colour of this variety becomes tinged with pink on the periphery. The plant will reach a height of between 85 and 90cm (34 and 35in) and a width of 50 to 60cm (20 to 24in), with a bushy and erect habit. The very branched stems are hollow and the leaves are opposite, pinnately compound, meaning they are divided into 3 or 5 leaflets, which have very toothed lobes. The leaves are quite dark green and the stems, which are sturdy, are more or less tinged with purple.

To encourage repeat flowering and extend the flowering period, be sure to remove faded flowers. Even better, regularly create attractive colourful bouquets by combining different varieties. Decorative dahlias go well with Gauras, Cleomes and Statices, which will lighten their generous silhouette. 'Mondriaan' flowers also allow for beautiful combinations in floral compositions, with yellow, orange and white varieties. The modest size of this variety makes it suitable for the centre of mixed borders, to structure a composition made up of bushes with colourful foliage (Physocarpus, Compact Winged Spindle, Loropetalum...) and shorter plants. Also consider ornamental grasses (Briza, small Miscanthus, Stipa, Eragrostis) which take on beautiful colours in autumn.

As the star of cottage gardens, Dahlias are undoubtedly beautiful flowers. They are perfect in a flower bed, but can also enhance a vegetable garden. In Mexico, this tuber was initially grown as a root vegetable for consumption. Its poor taste quickly relegated it to the status of an ornamental plant.

Dahlia Mondriaan in pictures

Dahlia Mondriaan (Flowering) Flowering

Plant habit

Height at maturity 87 cm
Spread at maturity 60 cm
Growth rate fast

Flowering

Flower colour yellow
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 medium green

Botanical data

Genus

Dahlia

Cultivar

Mondriaan

Family

Asteraceae

Other common names

Dahlia

Origin

Cultivar or hybrid

Product reference18628

Planting and care

The decorative Dahlia 'Mondriaan' is easy to grow in all regions. For abundant flowering, it is good to follow a few simple rules. Plant the tubers in a sunny location as soon as the last frost has passed. Rich, fresh, and well-drained soil is perfect. However, stagnant moisture 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 crushed horn or dehydrated blood. Place your tuber and crumble the soil well to refill 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 for the first 6 weeks to help with rooting.

Dahlias are sensitive to cold, so they need to be overwintered. In November, the first frosts cause the foliage to blacken, which is the time to dig them up. Carefully remove the tubers from the ground, removing 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 crate on newspaper. Store them in a frost-free, dry, cool, and dark place, such as a frost-free garage or an attic. In southern regions near the coast, where there are few frosty days per year, it is possible to leave them in place. In this case, simply cover the ground with a layer of leaves or straw for protection.

Despite its hollow stems, this Dahlia is still sensitive to strong wind or heavy rain. To mitigate this inconvenience, you can stake it, but let's agree, it's not very aesthetic. However, by pinching the stems early or removing the axial flower buds, you can spread out the habit of the plant, which will offer more resistance to bad weather. At the same time, you channel the sap flow to a single flower, which will become larger and stronger.

Planting period

Best planting time March to April
Recommended planting time March to May

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 the wilted 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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