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Iris germanica Vienna Waltz - Tall Bearded Iris

Iris germanica Vienna Waltz
Bearded Iris

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The large flowers of this iris are light pink with mauve highlights, softened with cream at the centre of the sepals, strongly undulate and finely dentate, enlivened by a melon-coloured beard. The flowering stem reaches 90 cm in height. Plant it in full sun, in well-drained, neutral to calcareous soil. Its late spring flowering extends the season for tall irises.
Height at maturity
90 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil, Moist soil
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Best planting time August to September
Recommended planting time July to October
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Flowering time May to June
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Description

'Vienna Waltz' is a tall bearded iris with large orchid-pink flowers highlighted with cream, particularly undulate and ruffled. This variety stands out for its pastel, almost pearly colour, the opulence of its corollas and a flowering that beautifully closes the season of the tall Iris germanica. Plant it in a sunny border in a position sheltered from the wind that would flatten its tall stems.

'Vienna Waltz' was registered in 2000 by American hybridizer Keith Keppel. This variety belongs to the group of tall bearded irises. It results from a cross between the cultivars 'Waltzing' and 'Victorian Days'; it is a seedling sibling of 'Happenstance'. The American Iris Society awarded it an Honorable Mention in 2002, an Award of Merit in 2004, and the Favorite Guest award in 2006.

This tall iris belongs to the Iridaceae family. It descends from Iris × germanica, a very old natural hybrid between the species I. pallida and I. variegata, native to the north-west of the Balkan Peninsula. It is simply called garden iris, flambé iris or German iris. This plant is perennial: it regrows each year from a thick, horizontal rhizome that likes to bask in the sun. The clump gradually widens by forming peripheral rhizomes. The leaves are arranged in fans, they are sword-shaped, rigid, glaucous green, more or less deciduous in winter. The flower stems reach 90 to 95 cm in height and bear several buds. Each flower shows three upright petals and three drooping sepals. In 'Vienna Waltz', the petals are light mauve-pink, very undulate and crimped on the edge. The sepals are slightly paler, with a large cream area towards the throat. The beard, short and downy, is a soft orange, between pale apricot, peach and light salmon. Flowering takes place in May-June
The name Iris comes from the Greek goddess of the rainbow; modern hybridizers have selected varieties with very fine shades, like this milky orchid-pink difficult to classify between lavender, pink and cream.

Plant this iris in full sun, in well-drained soil, even lime-rich, on a small mound if your soil is very wet in winter. You can associate it with Iris germanica 'Baie des Anges' (a bright light blue), with Euphorbia characias 'Black Pearl' and with Nepeta grandiflora 'Dawn to Dusk'. At the back, plant for example a grass Panicum virgatum 'Rehbraun' for its flexibility and light flowering in summer. 

The vegetable garden can accommodate a few clumps of irises, along with other cut flowers, notably gladioli and hybrid lilies.

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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

Flowering

Flower colour pink
Flowering time May to June
Inflorescence Spike
Good for cut flowers Cut flower blooms

Foliage

Foliage persistence Semi-evergreen
Foliage colour medium green

Plant habit

Height at maturity 90 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Iris

Species

germanica

Cultivar

Vienna Waltz

Family

Iridaceae

Other common names

Bearded Iris

Origin

Cultivar or hybrid

Product reference26109

Planting and care

Plant the iris ‘Vienna Waltz’ from July to October. Choose a very sunny position, with at least six hours of direct sunlight per day, as shade significantly reduces flowering. Plant it in fertile soil, neutral to lime-bearing, and especially very well-drained; in clay soil, loosen the soil widely and add gravel or coarse sand to prevent stagnant water around the rootstock. Place the rootstock almost at the surface, with the top face visible to the sun, and bury only the roots. Space the plants 30 to 40 cm apart. Water at planting time, then only in case of prolonged drought during the first year. Remove faded flowers, cut the spent flower stems at the base and remove dry leaves at the end of winter.
Divide the rootstocks every three or four years, in summer, when the centre of the clump flowers less.

Planting period

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

Intended location

Suitable for Meadow, Rockery
Type of use Border, Slope
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 4 per m2
Exposure Sun
Soil pH Neutral, Calcareous
Soil type Chalky (poor, alkaline and well-drained), Silty-loamy (rich and light), Stony (poor and well-drained)
Soil moisture Dry soil, Moist soil rich and well-drained

Care

Pruning instructions Cut the flower stems at the end of flowering. Optionally cut the foliage at an angle halfway up in summer using a pruning shear.
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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