Iris Plaisantin - Tall Bearded Iris
Iris Plaisantin - Tall Bearded Iris
Iris germanica Plaisantin
German Iris, Bearded Iris
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Description
Iris 'Plaisantin' is a bearded iris that is not very large, nor does it have large flowers, but it does have a complex, unusual colour. The compact flowers are a perfect blend of mauve and purplish lavender tones with a beautiful mandarin orange beard. The flower stems are quite short, matched to the size of the flowers, and less prone to bending under the effect of wind and rain. A lovely mid-season variety for borders or flower beds.
Iris 'Plaisantin' is a perennial, deciduous rhizomatous plant that develops elegantly upright clumps. It belongs to the Iris family. It is one of the many cultivars obtained over centuries, with its controversial origin being debated around the number of chromosomes of potential ancestors. It should be noted that bearded irises have European origins. They are plants that thrive in chalky soils and require plenty of sunlight, with the rhizomes needing to 'bake' in summer to flower well. A minimum of 6 hours of sunlight per day is generally required.
Iris 'Plaisantin' reaches 70 cm (28in) high on average, when in bloom, with several buds per flower stem. The clump will spread indefinitely over time, with the central rhizomes thinning out in favour of the outer rhizomes. The foliage consists of long and wide sword-shaped, slightly glaucous green leaves with parallel veins. Flower stems appear in April and produce several flowers that bloom from the top to the bottom in May. The colour is magnified by the thick and iridescent texture of the flowers. The 3 erect petals are smoky purplish lavender with a caramel edge, the 3 drooping sepals are velvety purple, and the beards are bright orange.
Obtained by Cayeux, 2020.
To accompany the irises, choose plants that are either low-growing or with light foliage that won't suffocate them. For example, Gaura will provide little shade to the irises and will keep the faded iris bed attractive all summer long. California Poppies and Love-in-a-Mist tolerate dry soil in summer, just like irises. Sage and Libertia also complement irises very well. Slopes and retaining walls can be stabilised by dense plantings of old iris varieties that require little care. If the goal is more decorative and easy access for care, choose more modern varieties that are less likely to be flattened by wind and rain.
The vegetable garden can be embellished with a few clumps or borders of irises for cutting.
Flowering
Foliage
Plant habit
Botanical data
Iris
germanica
Plaisantin
Iridaceae
German Iris, Bearded Iris
Cultivar or hybrid
Planting and care
Do you have a sunny location, sheltered from the wind, warm and rather dry in the summer?
This is the ideal location for large irises! In the shade, they grow but do not flower. They are hardy and do not need winter protection. Well-drained soil is perfect, even rather dry. German irises require limestone soil: add lime if it is acidic. Too much moisture in the soil promotes rhizome rot. Plant from July to September to allow the rhizomes enough time to grow and develop new roots before winter. They should be planted as soon as they are purchased for best results. Plan to divide irises every 4 years or so to give them fresh soil. They have vigorous growth and require space to develop and flower well. Plant with a spacing adapted to the size and vigour of the variety: about 34-50 cm (13-20in) for large ones. In a monochrome planting, the rhizomes are planted in a staggered pattern. To create a mix of colours, plant them in groups of several plants of the same variety. Always consider the direction of rhizome growth by arranging them in a star shape, with buds and leaves facing outward, and spacing them well away from other varieties so they have room to develop.
Planting
Dig a hole that is wide and deep enough. Make a wide conical mound of soil in the hole, place the rhizome and spread out the roots on top. Cover the roots. The rhizome needs to be left just above the surface of the soil, it should not be planted in a depression (risk of rot), so anticipate that the soil will settle and the iris will sink. In clay or moist soil, the rhizome can even be left elevated on a slight mound. To make the soil cling to the roots, lightly firm and water abundantly after planting. Water if needed 2-3 times until it takes root.
Maintenance:
Keep the soil weed-free by shallow hoeing, taking care not to damage the rhizomes or roots. Weeds shade the irises, retain moisture (causing rot), and attract slugs. Similarly, remove dry leaves. If they are diseased (reddish-brown-bordered spots of heterosporiosis), burn them. Remove faded 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).
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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