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Collector's item

Iris winogradowii

Iris winogradowii

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Wonderful and rare bulbous species with large scented flowers, primrose yellow with green spots on the sepals, with an orange crest, blooming in March-April. This small montane bulbous plant, perfectly hardy, prefers humus-rich and well-drained soils, rather dry in summer. A very beautiful iris for collectors, but sometimes a bit temperamental.
Flower size
10 cm
Height at maturity
15 cm
Spread at maturity
15 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Moist soil
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Best planting time September to October
Recommended planting time September to November
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Flowering time February to March
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Description

The Iris winogradowii, sometimes called Winogradoff's Iris, is a botanical species that has become rare in its native range, probably due to its wonderful pale yellow and fragrant flowering that emerges at the end of winter, but perhaps also because it requires specific growing conditions to thrive. This small bulbous plant produces beautiful large flowers of a soft primrose yellow, speckled with green on the sepals which are also marked with an orange crest. Originally from mountainous regions, perfectly hardy, this very beautiful iris deserves to be cultivated in humus-rich and moist, but well-drained soil, in the shelter of an understory, in filtered light.

 

The Iris winogradowii is a perennial plant of the iris family, native to the mountains of southern Caucasus, Azerbaijan and Georgia. Nowadays, it can only be found in a few locations in Georgia, where it grows in subalpine meadows, as well as in pockets of humus accumulated in slightly damp rocky outcrops. It also prefers semi-shaded exposures in summer, meaning under deciduous woody plants. The plant develops from a storage organ, which is an elongated bulb 2 to 3 cm (1in) tall, covered with a brown epidermis. In humid conditions, it tends to develop stolons. This iris blooms from late February, or in March depending on the climate, before the foliage appears, which makes it valuable in the garden. The flowers, 8 to 10 cm (3 to 4in) wide, are carried by stems about 8 cm (3in) tall. They are large compared to the size of the plant and appear to emerge directly from the ground. They consist of 3 erect inner tepals dominating 3 more horizontal outer tepals adorned with green spots and an orange midline. They are highly fragrant. The foliage develops when the flowers fade, forming a clump of narrow, stiff and pointed leaves, up to a maximum height of 30 to 40 cm (12 to 16in). It is at this point that the bulb divides into several bulblets, allowing the plant to colonize its environment.

 

The Iris winogradowii is cultivated in flower beds or rock gardens, in partial shade and in humus-rich, acidic soil that is always slightly moist. Cultivating it in pots seems quite delicate. It can be associated with other small early-flowering bulbs, such as snowdrops, spring crocuses, or botanical and early tulips. It also pairs well with hellebores. They should be planted in groups of 15 bulbs to quickly create beautiful splashes of colour in early spring. Lastly, it is a plant that should thrive in an alpine trough, just like Dodecatheon, Globularia cordifolia, or Saxifraga 'Pixie'.

Iris winogradowii in pictures

Iris winogradowii  (Flowering) Flowering
Iris winogradowii  (Plant habit) Plant habit

Plant habit

Height at maturity 15 cm
Spread at maturity 15 cm
Growth rate normal

Flowering

Flower colour yellow
Flowering time February to March
Inflorescence Solitary
Flower size 10 cm
Fragrance Fragrant

Foliage

Foliage persistence Deciduous
Foliage colour medium green

Botanical data

Genus

Iris

Species

winogradowii

Family

Iridaceae

Origin

Eastern Europe

Product reference823771

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Planting and care

Plant the bulbs in September-October, in a semi-shaded position in summer, sunny in winter, in humus-rich, acidic, well-drained (sandy or peaty) soil, 10 cm (4in) deep and preferably in groups, spaced 8 cm (3in) apart. Cut off the faded flowers at their base, taking care to leave the stem. Continue to water the plants at their base. Once the foliage has turned yellow, remove it and leave the bulbs in place for them to flower again the following year. After flowering, water three times with liquid fertilizer at one-month intervals. Leave the bulbs in place for several years.

Planting period

Best planting time September to October
Recommended planting time September to November
Planting depth 10 cm

Intended location

Suitable for Meadow, Rockery, Shaded rockery
Type of use Edge of border, Slope
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Experienced
Planting density 50 per m2
Exposure Sun
Soil pH Acidic, Neutral
Soil moisture Moist soil, Very well-drained, humus-bearing.

Care

Pruning No pruning necessary
Soil moisture Moist soil
Disease resistance Very good
Overwinter Can be left in the ground
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