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Iris Sharper Image - Tall Bearded Iris

Iris germanica Sharper Image
German Iris, Bearded Iris

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More information

A vigorous and floriferous, tall variety which forms dense clumps. This Iris has large, bright white flowers, with a pale lavender-blue beard. The flowers are highlighted by the slightly glaucous green foliage. Its late blooming from May to June allows you to extend the flowering season.
Flower size
13 cm
Height at maturity
1.05 m
Spread at maturity
45 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 July to October
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Flowering time May to June
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Description

Iris 'Sharper Image' (TB) is a tall variety of bearded iris with large flowers between mid and late spring. They are perfectly balanced and illuminate flower beds with their immaculate snow white, barely speckled with pale lavender. The plant rapidly develops into lush clumps that flower in beds and borders for a few weeks.

Iris 'Sharper Image' is a rhizomatous, deciduous perennial plant, with vigorous upright clumps. It belongs to the Iridaceae family, like Crocus, Gladiolus, or Crocosmia. Iris germanica, commonly known as bearded or German iris, is probably the result of hybridization between different botanical species. It belongs to the bearded iris group (due to the fine crest present on the sepals) and is the most commonly grown in gardens.
Sharper Image is a tall variety that reaches 105 cm (41in) high when flowering, with a strong floral stem supported by a rhizome and bearing numerous flower buds. The clump spreads rapidly, becoming as wide as it is tall, or even wider, with the central rhizomes becoming bare in favour of the outer rhizomes. The foliage consists of long, slightly arched sword-shaped, glaucous green leaves, arranged in a fan. Large floral stems appear in April which bloom in May or June depending on the climate, with large flowers measuring 12-14 cm (5-6in) wide that open from the top to the lower branches. They are pure white and formed by 3 sepals that stretch almost horizontally, topped by 3 upright petals that hide the style (female reproductive part). The sepals have a short pastel lavender beard at their base, and their surface has wavy edges, the vertical petals are pleasantly crinkled. Their silky texture is particularly attractive and ornamental.

Obtained by Black in 2005.

Awards: Honorable Mention in 2007, Award of Merit in 2010.

Iris are easy to associate with other plants. Just keep in mind that you will need to divide the clumps every 3 or 4 years, so leave enough available space. By associating early-blooming Iris with Sharper Image, you can spread the flowering season over about 2 months, beyond that, the choice is endless. Oenothera speciosa 'Twilight' or Evening Primrose is a low-growing perennial happy in well-drained soils and sunny exposures that Iris love and from June to September, it produces pretty pale pink flowers that will take over from your Iris. Gaura, in its many varieties with small airy white, pink, or almost red flowers, will also be a perfect companion. Daylilies will also extend the flowering season, Amadeus is a very beautiful deep red variety that will spice up your mixed flower bed!

Flowering

Flower colour white
Flowering time May to June
Inflorescence Cluster
Flower size 13 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 1.05 m
Spread at maturity 45 cm
Growth rate normal

Botanical data

Genus

Iris

Species

germanica

Cultivar

Sharper Image

Family

Iridaceae

Other common names

German Iris, Bearded Iris

Origin

Cultivar or hybrid

Planting and care

Do you have a very sunny location, dry in summer?
This is the ideal location for 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 dry and chalky, or stony. Too much moisture in the soil promotes rhizome rot. Plant from July to September to give the rhizomes enough time to grow and develop new roots before winter. They should be planted as soon as they are purchased for the best results. Plan to divide the irises every 4 years or so to give them fresh soil and start over with new rhizomes. This prevents the clumps from thinning out in the centre. They are vigorous and require space to develop and flower well. Planted with a spacing appropriate for the size and vigour of the variety: about 34-50 cm (13-20in) for the tall ones. Always consider the direction of growth of the rhizomes 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 grow.

Planting

Dig a hole that is wide and deep enough. Make a conical pile of soil in the hole and place the rhizome and spreading roots on top. Cover the roots. It is important that the rhizome is level with the surface of the soil. It should not be planted in a dip (risk of rot), so take into account that the soil will settle and the iris will sink. In clayey or damp soil, the rhizome can even be raised on a slight mound. To make the soil cling to the roots, lightly firm and water abundantly immediately after planting. Water 2-3 times if necessary 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 (rotting), and attract slugs. Similarly, remove dry leaves. If they are diseased (reddish-brown bordered spots of heterosporiosis), we recommend burning them. Remove faded flowers.

Planting period

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

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 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 stems at the end of the flowering period. If desired, cut the foliage diagonally halfway up in summer.
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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