Primula vulgaris Japan - Primrose
Primula vulgaris Japan - Primrose
Primula x vulgaris Japan
Primrose, Common Primrose, English Primrose
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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.
Flowering
Foliage
Plant habit
Botanical data
Primula
x vulgaris
Japan
Primulaceae
Primrose, Common Primrose, English Primrose
Primula polyanthus Japan
Cultivar or hybrid
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.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
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In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.