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Iris germanica Crinoline - Bearded Iris

Iris germanica Crinoline
German Iris, Bearded Iris

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A tall Bearded Iris, quite old, vigorous, with beautiful bicoloured flowering. This rather early variety offers large flowers in May and June, slightly undulate, with reddish-purple petals over widely edged and dotted sepals of the same purple, on a white background. The beards are yellow-orange. Its flowering stems reach a height of 95 cm (37in). Very bright in the garden.
Flower size
10 cm
Height at maturity
95 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 February to March, July to October
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Flowering time May
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Description

The Iris germanica 'Crinoline' is a variety of tall iris that is quite old and still charms with its vibrant bicoloured flowering. Its large undulate flowers display rich purple petals that dominate the widely bordered and speckled white sepals, all in the same tone as very ripe raspberries. The whole is enhanced by a yellow-orange throat and beards. Among the tallest, it dominates spring flower beds.

The 'Crinoline' Iris is a rhizomatous perennial that forms upright clumps. Its deciduous foliage disappears in autumn and reappears in spring. This plant belongs to the Iridaceae family. It is one of many cultivars obtained over the centuries, with debate about their controversial origins revolving around the number of chromosomes of potential ancestors. It should be noted that Bearded Irises have European origins.

The 'Crinoline' Iris is a tall variety, reaching 95 cm (37in) in height when in bloom. Each rhizome produces a branching stem that carries several flower buds. The clump spreads very rapidly and indefinitely, with the central rhizomes thinning out in favour of the outer ones. The foliage consists of long sword-shaped leaves, glaucous green in colour, strongly veined. In April floral stems appear, which will produce flowers in April-May, somewhat towards the beginning of the Tall Iris season, blooming progressively from the top downwards to the lower branches. The colour of this plant is, as always with Bearded Irises, magnified by the silky texture of the petals and sepals. 

Obtained by Schreiner in 1964.

To accompany your irises, choose plants based on their similar needs (sunlight, soil), a growth habit that is "respectful" of irises (i.e. non-competitive plants which are shorter, have light foliage), and how they complement each other visually (appearance, flowering period). For example, Gauras won't create shade, and will keep the bed attractive all summer after your irises have finished flowering. California Poppies and Love-in-a-Mist will tolerate dry soil in summer, just like irises. Perennial geraniums, salvias, and Libertias also accompany irises very well. The earth around the base of small trees with light foliage, and on slopes and terraced edges, will be stabilised by dense planting of old varieties that can remain in place and require little care. If the goal is more decorative and access for maintenance is possible, one can choose more modern varieties, e.g. intermediate ones that are less likely than tall ones to be flattened by wind and rain.

The vegetable garden can be adorned with a few clumps or borders of irises, as the classic place for the cultivation of cut flowers.

Iris germanica Crinoline - Bearded Iris in pictures

Iris germanica Crinoline - Bearded Iris (Flowering) Flowering

Flowering

Flower colour two-tone
Flowering time May
Inflorescence Cluster
Flower size 10 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 95 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Iris

Species

germanica

Cultivar

Crinoline

Family

Iridaceae

Other common names

German Iris, Bearded Iris

Origin

Cultivar or hybrid

Planting and care

Does your garden have a sunny area, sheltered from the wind, that is warm and rather dry in summer? This is the ideal location for planting irises! In the shade they will grow but do not flower. They are hardy and do not need winter protection. Well-drained soil is perfect, even if it is rather dry. Iris germanica require alkaline soil: amend yours with lime if it tends to be acidic. Excessively wet soil promotes rhizome rot. Plant from July to September: this allows the rhizomes to grow sufficiently before lifting, and to develop new roots before winter. For best results they should be planted as soon as they are purchased. Plan to divide the iris every 4 years or so to give them fresh soil. They have strong growth and need space to develop and flower well. They are planted with spacing appropriate to the size and vigour of the variety: about 34-50 cm (13-20in) for tall ones (5 to 10 plants per square metre). In a monochrome planting, the rhizomes are planted in a staggered pattern. When mixing colours, it is recommended for the overall aesthetics of the iris bed to 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 in relation to other varieties so they have room to develop.

Planting:

Dig a hole that is wide and deep enough for the roots. Make a large conical mound of soil in the hole, on which the rhizome and spread-out roots are placed. Cover the roots. It is important that the rhizome is 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 clayey or damp soil, the rhizome should even be left raised on a slight mound of a few centimeters. To make the soil adhere to the roots, lightly compact the soil and water it abundantly after planting. Water 2-3 times if necessary until the plant establishes.

Maintenance:

Keep the soil free of weeds by shallow hoeing, taking care not to injure the rootstocks or roots. Weeds shade the irises, retain moisture (causing rot), and attract slugs. Also, remove dry leaves. If they are diseased (reddish-brown spots of heterosporiosis), we recommend burning them. Remove faded flowers.

Planting period

Best planting time August to September
Recommended planting time February to March, 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 5 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, Well-drained soil

Care

Pruning instructions Cut the flowering stalks at the end of the flowering period. If desired, cut the foliage at a 45-degree (113°F) angle halfway up 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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