Iris germanica Antarctique - Bearded Iris
Iris germanica Antarctique - Bearded Iris
Iris germanica Antarctique
Bearded Iris
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Description
'Antarctique' is an intermediate garden iris that is particularly floriferous, offering a soft contrast between pure white petals and pale lavender blue sepals. Shorter than a tall bearded iris, it happily grows in a sunny border, at the front of a flower bed or on a well-drained slope. It flowers before or at the same time as the earliest tall iris varieties, on short stems that are more resistant to wind.
This plant reaches about 45 cm in height when in flower. Its clump gradually widens by means of short rhizomes and, after a few years, forms an upright clump 30 to 40 cm across. The leaves, narrow, stiff and glaucous green, are arranged in fans. The flowers are formed of three pure white upright petals, over three light lavender blue trailing sepals, adorned with a light yellow beard. In iris terminology, this type of flower is called amoena: the upright petals are white or nearly white, while the sepals are coloured. In 'Antarctique', the flower stems carry several buds that open successively over about 3 weeks. It is a rather early variety, which flowers in April-May or in May depending on the region.
'Antarctique' was bred in France by Richard Cayeux and registered in 1993 under seedling number 8708 B. Its parentage combines the cultivars 'Boo' and 'Spinning Wheel'. It belongs to the group of intermediate bearded irises, situated between dwarf irises and tall irises in both height and flowering period.
Botanically, garden bearded iris cultivars are assigned to Iris × germanica, an ancient hybrid between the species Iris pallida and I. variegata. These are hardy perennials in well-drained soil and resistant to summer drought once well established. The clump widens by the elongation of the rhizomes at the periphery. These rhizomes must remain close to the surface, with their backs visible to the sun. When the centre of the clump becomes less floriferous, divide the clump after flowering or at the end of summer, then replant the young peripheral rhizomes.
Plant iris ‘Antarctique’ in groups of three to five rhizomes, spaced 30 to 35 cm apart. In a very sunny, well-drained flower bed, it can be combined with the Allium karataviense ‘Ivory Queen’, the Nepeta ‘Purrsian Blue’ and the pink ‘Haytor White’ for example.
Flowering
Foliage
Plant habit
Botanical data
Iris
germanica
Antarctique
Iridaceae
Bearded Iris
Cultivar or hybrid
Planting and care
Plant the iris ‘Antarctique’ from July to October, when the rootstock can root before winter, or in spring in heavy soils that remain moist in autumn. Choose a very sunny aspect, with at least six hours of direct sunlight per day. Prepare a light, loose, rather rich soil, neutral to calcareous or slightly acidic, but above all free-draining. In clay soil, plant on a slight mound and mix gravel or coarse sand into the planting soil. Place the rootstock almost at the surface, with the back visible to the sun, then cover only the roots. Water after planting, then only during prolonged droughts in the first year. Deadhead faded flowers as they appear. Cut spent flower stalks at the base, but keep healthy leaves until they yellow. Apply some mature compost in spring, around the clump, without covering the rootstocks. Divide the clumps every three or four years in summer, when the centre produces fewer flowers.
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.