Athyrium otophorum var. okanum - Eared Lady Fern
Athyrium otophorum var. okanum - Eared Lady Fern
Athyrium otophorum var. okanum - Eared Lady Fern
Athyrium otophorum var. okanum
Eared Lady Fern
Very damaged young plant (many withered fronds, roots protruding 10 cm (4in) from the pot).
Charlyne, 24/04/2022
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Description
Athyrium otophorum var. okanum, also known as the Eared Lady Fern, is a rare Asian species, albeit small in size, it boasts foliage with exceptional, subtle and ever-changing shades throughout the season. Its young triangular fronds, are cream with hints of blue green and veined with purple. They play with light and shadow, creating an illusion of very pale silver and gold, before taking on a soft, bluish-green, slightly greyish hue, sometimes with reddish reflections. Until summer, the juvenile fronds appear and coexist with mature leaves, giving the plant a bicolour appearance. This deciduous species is very hardy. It thrives in partial shade, in humus-rich and moist soil, and adapts well to pot cultivation.
Athyrium otophorum var. okanum is a lady fern native to Japan, China, and Korea, very similar to the Japanese Painted Fern Athyrium japonicum 'Pictum'. Like all so-called 'lady ferns', it belongs to the family of Athyriaceae. It forms a very harmonious, spreading clump, a little wider than tall, not exceeding 40 to 50 cm (16 to 20in) in height, with a fairly slow growth. In spring, creamy white croziers are covered with dark, glossy scales appear. They quickly unfurl and elongate, releasing young triangular fronds with delicate pastel shades. They grow and mature gracefully, becoming greener and slightly arching, supported by a structure of vibrant burgundy red petioles, rachis, and veins. This fern is deciduous, but its foliage persists for quite a while, well after the first frost.
All ferns of the genus Athyrium completely lose their foliage in winter. That being said, they are very cold-resistant, and are very easy to grow in any moist soil rich in leaf compost. Athyrium otophorum var. okanum, with its small size, is very well suited for decorating a planter, a shaded rockery, or bordering a less sunny pathway. This truly beautiful fern deserves to be cultivated among a few well-chosen perennial plants, or in a pot near the house. In our garden, we have paired it with Brunnera macrophylla 'Dawson's White' and Gentiana asclepiadea on a fresh slope. It also makes a good companion for primroses, creeping bugles, Corydalis, bleeding hearts...
Athyrium otophorum var. okanum - Eared Lady Fern in pictures
Foliage
Plant habit
Botanical data
Athyrium
otophorum var. okanum
Athyriaceae (Dryopteridaceae)
Eared Lady Fern
Southeast Asia
Planting and care
The lady fern is easy to grow in humid regions in a soil rich in humus, which always remains moist but is well-drained. It dislikes limestone and heavy soils. In the case of drought or insufficient humidity, its foliage wilts and appears burnt. Remove browned or dried fronds at the end of winter, when new vegetation starts to appear.
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.