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Iris germanica Au Sommet - Tall bearded iris

Iris germanica Au Sommet
German Iris, Bearded Iris

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A very beautiful late-flowering variety. This Iris produces very large flowering stems, which are highly resistant to wind. They bear large bicoloured flowers, with upright petals in pale copper tones, while the trailing sepals in amethyst to magenta hues create a stunning contrast. A majestic garden Iris, perfect for planting behind lower-growing varieties and blending seamlessly into a mixed border.
Flower size
13 cm
Height at maturity
1.10 m
Spread at maturity
50 cm
Exposure
Sun
Hardiness
Hardy down to -23°C
Soil moisture
Dry soil, Moist soil
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Best planting time July to August
Recommended planting time June to September
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Flowering time May to June
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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.



 

 

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Garden iris, bearded iris: planting, care
Family sheet
by Virginie T. 13 min.
Garden iris, bearded iris: planting, care
Read article

Iris germanica Au Sommet - Tall bearded iris in pictures

Iris germanica Au Sommet - Tall bearded iris (Flowering) Flowering

Flowering

Flower colour two-tone
Flowering time May to June
Inflorescence Cluster
Flower size 13 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.10 m
Spread at maturity 50 cm
Growth rate normal

Botanical data

Genus

Iris

Species

germanica

Cultivar

Au Sommet

Family

Iridaceae

Other common names

German Iris, Bearded Iris

Origin

Cultivar or hybrid

Product reference24339

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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.

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Planting period

Best planting time July to August
Recommended planting time June to September

Intended location

Suitable for Meadow, Rockery
Type of use Border, Slope
Hardiness Hardy down to -23°C (USDA zone 6a) Show map
Ease of cultivation Beginner
Planting density 6 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Silty-loamy (rich and light)
Soil moisture Dry soil, Moist soil, Well-drained soil

Care

Pruning instructions Prune the flower stems after flowering. If desired, you can also cut back the foliage at a slant to half its height in summer using pruning shears.
Pruning Pruning recommended once a year
Pruning time July to August
Disease resistance Good
Overwinter Can be left in the ground

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