Iris germanica Au Sommet - Tall bearded iris
Iris germanica Au Sommet - Tall bearded iris
Iris germanica Au Sommet - Tall bearded iris
Iris germanica Au Sommet
German Iris, Bearded Iris
They have settled in well over the winter and are putting on good growth again this spring, awaiting the flowers. Thank you.
marthe , 25/03/2026
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Description
Iris germanica 'Au Sommet' is a very vigorous and floriferous variety of Bearded Iris. From mid-May, long flowering stems emerge, bearing large, strikingly architectural and colourful flowers. The pale coppery yellow petals stand upright, while the gracefully drooping horizontal sepals are somewhere between magenta and amethyst. A truly superb variety!
Irises belong to and give their name to the Iridaceae family, which includes dozens of plant genera ranging from temperate to tropical regions. Iris germanica, native to Syria, is the ancestor of modern Bearded Irises. These result from numerous successive cross-breedings to continually produce new colours or colour combinations. They are rhizomatous irises, as opposed to bulbous irises like the Dutch Iris.
'Au Sommet' is a variety bred by the French hybridiser Cayeux, developed in 2013 and released the following year. This cultivar is the result of cross-breeding two horticultural varieties, 'Jazz Festival' and 'Enchanting'.
Iris 'Au Sommet' is notable for its impressive height, reaching up to 1.10m when in full bloom. Its sturdy flower stems hold up well against the wind. It forms a clump around 50cm wide, or even more over time. This robust variety produces long, sword-shaped, ribbon-like leaves that taper gradually to a point, in a beautiful glaucous green. The foliage overlaps to form large fans. It is late-flowering, it blooms between mid-May and late June in average climates, a little earlier in mild climates and later in colder regions. The large flowers (around 13cm) are composed of three petals and three sepals. The upright petals are a pale coppery yellow with a more pronounced border. The sepals extend horizontally before gracefully curving downward. Their colour is a magenta that shifts to amethyst towards the centre, while a coppery border a few millimetres wide accentuates the petals' wavy edges. The "beard", located in the middle section towards the corolla's centre, is copper-coloured. Flowering lasts approximately three weeks, slightly less in poor weather. If spent flowers are not removed, large green, rugby-ball-shaped seed pods form, though it's best to deadhead to prevent the plant from expending unnecessary energy.
Iris 'Au Sommet' will look stunning in a mixed border. Its beautiful flowering period is relatively short, and the plant isn't particularly attractive after this dazzling display. Pair it with other perennial plants or bushes to extend the visual interest. Daylilies will reward you with their ephemeral but continuously renewed blooms over several months. Red Hot Pokers (Kniphofias) with their vibrant spikes also make excellent companions for a sunny, colourful display. In the background, add ornamental-leaved bushes like Smoke Bushes, which also offer delicate, airy flowers. Ensure your Irises remain easily accessible, as they will need dividing every three to four years.
Iris germanica Au Sommet - Tall bearded iris in pictures
Flowering
Foliage
Plant habit
Botanical data
Iris
germanica
Au Sommet
Iridaceae
German Iris, Bearded Iris
Cultivar or hybrid
Planting and care
Iris 'Au Sommet' requires a very sunny location, even quite dry in summer.
In the shade, irises will grow but will not flower. They can be cultivated in all regions. Being hardy, they do not need winter protection. Well-drained soil is perfect, even if it is rather dry and chalky, or even stony. Overly moist soil encourages rhizome rot. Plant from July to September. This allows the rhizomes enough time to grow sufficiently before lifting, and then to develop new roots before winter. They should be planted immediately after purchase for the best results. Plan to divide irises approximately every four years to provide them with fresh soil and because the clumps thin out from the inside over time. Divide in summer during the dormant period by lifting the clumps with a garden fork and selecting the finest rhizomes (discard the smaller ones).
Irises have vigorous growth and require space to develop and flower well, especially this 'Au Sommet' variety. They should be planted with spacing appropriate to the size and vigour of the variety: in the case of this variety, approximately 45-50 cm (5 to 8 plants per square metre). 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 to allow room for development.
Planting
Dig a hole wide and deep enough. Create a conical mound of soil in the hole on which to place the rhizome with the roots spread out. Cover the roots. It is important that the rhizome sits just at the soil surface. It should not be planted in a depression (risk of rot). Allow for soil settling and the iris sinking. In clay or moist ground, the rhizome should even be slightly raised on a small mound a few centimetres high. To help the soil cling to the roots, lightly firm the soil and water generously immediately after planting. Water as needed 2-3 times until established.
Maintenance:
Keep the soil free of weeds by shallow hoeing, taking care not to damage the rhizomes or roots. Weeds shade the irises, retain moisture (leading to rot) and attract slugs. Similarly, remove dry leaves. If they are diseased (reddish-edged spots from heterosporiosis), we recommend burning them. Remove faded flowers to prevent the iris from wasting energy unnecessarily on producing fruit.
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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