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Primula vulgaris Japan - Primrose

Primula x vulgaris Japan
Primrose, Common Primrose, English Primrose

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A robust and floriferous garden primrose, offering the first flowers of the year. Its large, flat flowers, wider than those of classic varieties, bloom from January under shelter, or during February-March. Their pinkish-white hue, accentuated by a beautiful, intense red eye, presents a striking and refined contrast. Perfect for planters, pots or borders, it enjoys gentle sun or partial shade, in fertile and moist soil.
Flower size
5 cm
Height at maturity
15 cm
Spread at maturity
25 cm
Exposure
Sun, Partial shade
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time September to October
Recommended planting time February to April, September to November
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Flowering time January to March
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Description

Primula 'Japan' is a garden primrose with exceptional colouring, both soft and intensely contrasted. Its large, flat, wide-open flowers display a rosy white hue, enhanced by a vivid red eye that captures attention and makes it truly unique. This refined contrast places 'Japan' among the most striking varieties in the "Big 5" group, alongside 'Mojito', 'Milkshake', or 'Chameleon'. Sturdy, vigorous, and very floriferous, it offers early flowering, in February-March. 'Japan' combines elegance, reliability, and visual impact: a premium choice to start the season in style.

Primula 'Japan' is a recent horticultural development. It is a herbaceous perennial plant from the primrose family, belonging to the group of complex polyanthus-type hybrid primroses.
'Japan' stands out for its colouring, vigour, and performance. This variety quickly forms a neat compact clump, 15 cm tall and 25 to 30 cm wide, composed of rosettes of spatulate leaves, slightly embossed and of a very dark green. They can persist in winter, depending on the climate. Its flowering begins in January under cover, in February in open ground, and lasts 4 to 6 weeks. The 5-6 cm diameter flowers, held above the foliage, are broad and flat, with well-opened petals that fully express their bicolour hue. This combination of rosy white and red makes this cultivar one of the most elegant and expressive in its category.

The 'Japan' primrose is perfect for providing flowers in your borders from the first fine days. It can be seen as a carpet under a deciduous bush, paired with small botanical daffodils or very early tulips like the Botanical Tulip humilis. In a planter, it is sensational alongside blue pansies 'F1 Inspire Metallic Blue Blotch' and small trailing ivies 'Cross Switch'. It is useful for enlivening the garden or terrace early in the season.

 

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Primula: planting, cultivation, maintenance and companion planting
Family sheet
by Alexandra 12 min.
Primula: planting, cultivation, maintenance and companion planting
Read article

Flowering

Flower colour two-tone
Flowering time January to March
Inflorescence Solitary
Flower size 5 cm

Foliage

Foliage persistence Semi-evergreen
Foliage colour dark green

Plant habit

Height at maturity 15 cm
Spread at maturity 25 cm
Growth rate normal

Botanical data

Genus

Primula

Species

x vulgaris

Cultivar

Japan

Family

Primulaceae

Other common names

Primrose, Common Primrose, English Primrose

Botanical synonyms

Primula polyanthus Japan

Origin

Cultivar or hybrid

Product reference24739

Planting and care

'Japan' primroses should be planted in containers and planters or directly in open ground in finely prepared and enriched soil. Plant them as soon as possible after receipt, in September-October or March-April. If the intended location is not yet ready or conditions are unfavourable for planting, you can grow them on in pots for 4 to 6 weeks.

For containers and planters, use a good, light and well-draining flowering plant compost (such as geranium compost) enriched with clay and slow-release fertiliser. The top of the root ball should be level with the compost. Water thoroughly at planting and during the following weeks, as plug plants can dry out quickly. However, be careful not to overwater! Ensure containers have drainage holes and empty the saucer 10 minutes after watering. Remember to water even during winter if it doesn't rain or if the container is placed in a sheltered location. Do not water during frost periods.

Being highly floriferous and fast-growing, primroses are greedy plants. From when growth resumes, late February to early March, and throughout the flowering period, apply a liquid fertiliser for flowering plants containing iron and trace elements 1 to 2 times per week with the watering water. Remove faded flowers to encourage new flowering. Once flowering has finished, container-grown plants can be replanted in partial shade in the garden.

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€7.50
12
€19.50
3
€17.50

Planting period

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

Intended location

Suitable for Woodland edge
Type of use Edge of border, Container
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 9 per m2
Exposure Sun, Partial shade
Soil pH Acidic, Neutral
Soil type Silty-loamy (rich and light)
Soil moisture Moist soil, Humus-bearing, fertile.

Care

Pruning instructions To extend the flowering period, you can regularly remove the faded flowers.
Pruning Pruning recommended once a year
Pruning time February to April
Disease resistance Good
Overwinter Can be left in the ground

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