Polystichum polyblepharum - Japanese Lace Fern
Polystichum polyblepharum - Japanese Lace Fern
Polystichum polyblepharum - Japanese Lace Fern
Polystichum polyblepharum - Japanese Lace Fern
Polystichum polyblepharum
Japanese Lace Fern
Two small young plants in a bucket planted last November: they have developed well this spring with beautiful foliage and a lovely habit in the shade in clay-limestone soil. I'm waiting to see if my little plants will withstand the hot, dry summer.
Solène G., 23/05/2025
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Polystichum polyblepharum - Japanese Lace Fern in pictures
Foliage
Plant habit
Botanical data
Polystichum
polyblepharum
Dryoptéridacées
Japanese Lace Fern
Polystichum polyblepharon, Aspidium polyblepharum
East Asia
Planting and care
Polystichum polyblepharum is planted in spring or early autumn, outside periods of frost or drought. Shade and partial shade suit it; a few hours of morning sun are acceptable if the soil remains moist. Loosen the soil deeply and incorporate leaf mould or well-rotted compost. The stump should sit at surface level, without being buried. This fern tolerates clay or chalky soil, provided that water does not accumulate in it in winter. In heavy soil, a slightly raised planting position protects the heart of the stump. Water during the first two summers. A well-rooted plant tolerates a short dry spell. A mulch of dead leaves keeps the soil cool and moist. Stumps are divided in spring. Pot cultivation is possible in a large container, placed in shade and watered regularly.
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).
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.
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