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Iris Curio - Dwarf iris

Iris pumila Curio
Dwarf Iris, Pygmy Iris

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A miniature dwarf iris, with stems 18 cm tall, which blooms in April. Its small, beautifully formed flowers consist of bright yellow petals overlying sepals of the same yellow with a large dark red spot near the beards. They are eye-carching in the rockery or on a sunny slope.
Flower size
6 cm
Height at maturity
18 cm
Spread at maturity
20 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil
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Best planting time September to October
Recommended planting time February to March, July to October
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Flowering time April to May
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Description

The 'Curio Iris' is a variety of dwarf iris with particularly vibrant colouring, with its flowers of golden yellow speckled with dark red near the throat. Towards the end of April, it creates splendid little floral tufts. This radiant variety is perfect for brightening up slopes, rockeries, and raised borders.

The 'Curio Iris' belongs to the horticultural group of Miniature Dwarf Bearded Irises (MDB). The varieties in this group meet the following criteria: foliage shorter than the flower stem, curved or sickle-shaped, height less than 25 cm and flowers measuring 5 cm to 7.5 cm in diameter. It is a small, rhizomatous, deciduous perennial plant that, from spring onwards, has an upright clumping habit. It belongs to the Iridaceae family. Cultivars of small irises first appeared in the 1950s. Originally, the 'dwarf' category referred to the crossbreeding of an Iris pumila and a tall iris. This term now generally refers to the category of Standard Dwarf Bearded Irises (SDB).

The 'Curio Iris' will reach a height of 18 cm when in bloom. It will spread without any theoretical limit over time, with the rhizomes in the centre becoming bare in favour of the outer rhizomes. This small plant has a low and dense clumping habit. The foliage is deciduous in winter and consists of elongated, glaucous green leaves with parallel veins. It is a late-flowering dwarf variety, one of the last to bloom among dwarf irises. In March, floral stems appear, which will produce flowers that open from the top down. The colour of this plant is described precisely as follows: "Variegata with bright yellow petals and red sepals broadly edged in yellow. Lovely form. Vibrant colour."

Bred by Ben Hager (California, U.S.A), 1971.

Awards: Melrose Gardens 1972. Honorable Mention 1973. Caparne Prize 1976.

The dwarf irises are charming for adding colour and structure to the garden, especially in spring. They require a sunny location and well-drained soil to thrive. Avoid areas where water stagnates, as their rhizomes do not tolerate excessive moisture.

These little wonders are perfect for borders or the front of flower beds. Dwarf irises also integrate well into rockeries or gravel gardens, thanks to their drought tolerance.

Dwarf irises pair well with other plants that share their need for sun and well-drained soil. Small perennial plants like rock cress, creeping phlox, and sedums are good companions, as they complement irises in terms of texture and colour while covering the ground. Spring bulbs such as botanical tulips, spring crocuses, and grape hyacinths add vibrancy. Small grasses like blue fescue can provide a contrast in texture and structure the space around the irises.

Remember to divide dwarf irises every 4-5 years to maintain their vigour and multiply them, allowing you to enjoy their beauty for many years.

Flowering

Flower colour yellow
Flowering time April to May
Inflorescence Cluster
Flower size 6 cm

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Plant habit

Height at maturity 18 cm
Spread at maturity 20 cm
Growth rate normal

Botanical data

Genus

Iris

Species

pumila

Cultivar

Curio

Family

Iridaceae

Other common names

Dwarf Iris, Pygmy Iris

Origin

Cultivar or hybrid

Planting and care

Do you have a sunny, warm location, rather dry in summer?
This is the ideal location for planting irises! In the shade, they grow but do not bloom. They are hardy and do not need winter protection. Well-drained soil is perfect, even if it is rather dry and chalky. Soil that is too wet promotes rhizome rot. Plant from July to September. This allows the rhizomes enough time to grow and develop new roots before winter. They should be planted as soon as they are purchased for best results. Plan to divide irises every 4 years or so to give them fresh soil. They have vigorous growth and require space to develop and flower well. Plant with spacing appropriate to the size and vigour of the variety: about 34-50 cm for tall ones (5 to 10 plants per square metre). In a monochrome planting, the rhizomes are planted in a staggered pattern. For a mix of colours, 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 away from other varieties so they have room to grow.

Planting

Dig a hole that is wide and deep enough. Make a conical mound of soil in the hole, on which the rhizome and spreading roots are placed. Cover the roots. It is important for the rhizome to be left just above the surface of the soil. It should not be planted in a dip (risk of rot), so anticipate that the soil will settle and the iris will sink. In clay or moist soil, the rhizome should even be raised on a slight mound of a few centimetres. To make the soil cling to the roots, lightly firm the soil and water abundantly immediately after planting. Water 2-3 times if necessary until the plant resumes growth.

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 (causing rot), and attract slugs. Similarly, remove dry leaves. If they are diseased (reddish-bordered spots of heterosporiosis), burn them. Remove faded flowers.

Planting period

Best planting time September to October
Recommended planting time February to March, July to October

Intended location

Suitable for Rockery
Type of use Edge of border, Container, 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, Well-drained soil

Care

Pruning instructions Cut the flowering stems at the end of flowering.
Pruning Pruning recommended once a year
Pruning time May to June
Disease resistance Good
Overwinter Can be left in the ground

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