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Spiraea japonica Merlo Gold - Japanese Spirea

Spiraea japonica 'Davcop04' MERLO® GOLD ( MERLO® series )
Japanese Spirea, Japanese Meadowsweet

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A very compact Japanese Spiraea, which forms a cushion wider than it is tall, can be planted both in a pot on a terrace or in the garden in open soil. It produces young shoots that are red at first, then turn to gold, and remain yellow in summer, before the plant turns orange-red in autumn before leaf drop. Additionally, it produces lovely pink flowers in summer, a season that is less abundant in flowering shrubs than spring. Very hardy and easy to cultivate in most soils, it is the ideal young plant for beginners in the garden.
Flower size
5 cm
Height at maturity
30 cm
Spread at maturity
60 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -29°C
Soil moisture
Moist soil
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Best planting time March, October
Recommended planting time February to April, September to November
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Flowering time June to August
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Description

Spiraea japonica 'Merlo Gold' is a variety of Japanese spiraea with a truly compact habit, forming a very ornamental spreading cushion. Its foliage combines the red of the young shoots, gold as they grow, turning yellow in summer. When autumn arrives, it takes on an orange-red hue before the leaves fall. Its summer, its pink flowering is also attractive and valuable during this season when many bushes no longer bloom. A dwarf variety that is equally interesting in the ground or in a pot on a terrace or balcony.

Spiraea is a member of the large botanical family of Rosaceae, which includes most temperate climate fruit trees (apple trees, plum trees, apricot trees...), numerous ornamental plants (Cotoneaster, Rose of course, Photinia...) as well as many wild plants that populate the countryside (wild strawberry, burnet...).
The Spiraea genus (from the Greek speira, meaning "spiral") is rich in around a hundred species native to the temperate regions of the northern hemisphere: North America (up to Mexico), East Asia up to the Himalayas, but quite rare in Europe in a natural state. The Japanese spiraea comes from Japan, China, and Korea, where it grows in wet to moist soils, in full sun, reaching nearly 2 m in height.
Merlo Gold (Davcop04) is a horticultural variety obtained in Anjou by the breeder Jean-Paul Davasse. This shrub is attractive in more ways than one, especially for small gardens. Of medium growth, it forms a cushion approximately 30 cm high and 60 cm wide, perfectly tolerating pruning, and can therefore be very easily cultivated in a decorative pot to enhance a terrace. Its compact habit and dense foliage will also allow it to be planted at the edge of a bed, or in a border, or even within an English mixed border, alongside perennial plants. The fine shoots are adorned with small elliptical and pointed leaves, with finely toothed edges. The young shoots emerge in spring in red tones that give a flamboyant appearance to the shrub, before turning to gold, then yellow throughout the summer. Depending on the climatic conditions, if it is not too hot or too dry, the plant can continue to produce new shoots, whose red will contrast nicely with the yellow foliage. In autumn, the foliage takes on a superb orange-red colour to beautifully conclude the season, before the leaves fall and winter arrives.
Between June and August, depending on the region, this dwarf spiraea celebrates summer by offering a beautiful pink flowering, in the form of corymbs about 5 cm in diameter, well highlighted by the yellow foliage.

Combining excellent cold resistance, ease of cultivation, and compact size, Spiraea 'Merlo Gold' is an excellent choice for small gardens, brightening up borders with its colourful and luminous foliage. You can easily create contrasts in shape, size, foliage colours, and flowers by pairing it with other equally accommodating plants. Thus, Weigela florida 'Ebony and Ivory' with its upright habit and purple-green foliage will be an ideal companion, both in the garden and on the terrace, as you can also cultivate it in a container. Its white spring flowers are beautifully complemented by its dark foliage. In the background, a plant of Philadelphus 'Belle Etoile', a famous nearly century-old Mock Orange variety, will create a calming green backdrop while its fragrant white flowering will connect the two other shrubs. To enjoy even more flowers, make room for a beautiful shrub rose in your border, which will offer you stunning bouquets to decorate and fragrance your home.

Spiraea japonica Merlo Gold - Japanese Spirea in pictures

Spiraea japonica Merlo Gold - Japanese Spirea (Foliage) Foliage

Plant habit

Height at maturity 30 cm
Spread at maturity 60 cm
Habit spreading
Growth rate normal

Flowering

Flower colour pink
Flowering time June to August
Inflorescence Corymb
Flower size 5 cm
Bee-friendly Attracts pollinators

Foliage

Foliage persistence Deciduous
Foliage colour golden

Botanical data

Genus

Spiraea

Species

japonica

Cultivar

'Davcop04' MERLO® GOLD ( MERLO® series )

Family

Rosaceae

Other common names

Japanese Spirea, Japanese Meadowsweet

Origin

Cultivar or hybrid

Product reference22219

Planting and care

Plant the Japanese Spiraea 'Marlo Gold' in any soil that is not too dry, preferably fertile, well-drained, and in full sun. The presence of lime, in moderation, is well tolerated, as is light shading. Water thoroughly during the first year to ensure the young plant establishes its roots properly, then provide additional water during dry spells. Prune in March to 15 cm above the soil: late winter pruning is essential for achieving a beautiful flowering. Spiraea japonica are perpetual plants; to encourage a second flowering, lightly prune the plant or remove faded flowers to promote a resurgence in late summer or early autumn. This plant flowers on the current year's shoots. To maintain the vigour of the young plant, it is also important to remove some old stems at the base in spring. Apply a complete fertiliser in March. Space the plants 60 cm apart at planting, preferably in autumn and winter.

Planting period

Best planting time March, October
Recommended planting time February to April, September to November

Intended location

Suitable for Meadow
Type of use Edge of border, Container
Hardiness Hardy down to -29°C (USDA zone 5) Show map
Ease of cultivation Beginner
Planting density 1 per m2
Exposure Sun, Partial shade
Soil pH Any
Soil type Clayey (heavy), Clayey-chalky (heavy and alkaline), Silty-loamy (rich and light)
Soil moisture Moist soil, ordinary, well-prepared

Care

Pruning instructions To maintain the vigour of the young plant, remove some old branches at the base in spring. Prune the faded flowers to encourage the plant to flower again.
Pruning Pruning recommended once a year
Pruning time March
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground

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