Iris hoogiana
Iris hoogiana
Iris hoogiana
Iris hoogiana
aril iris
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Description
Iris hoogiana is a perennial plant that comes from Turkestan. This species, intermediate between rhizomatous irises and bulbous irises, is renowned for its fragrant flowering in a lovely lavender blue and its ease of cultivation in well-drained soil. It is a wild iris adapted to cold winters (-15°C) and dry summers.
The Hoog Iris is a rhizomatous perennial plant of the iridaceae family that develops thanks to a rhizome often contracted into a bulbous shape. This rhizome produces numerous stolons that can reach considerable lengths. Native to the regions of Kazakhstan, Kyrgyzstan, Uzbekistan, Tajikistan, and Turkmenistan, this plant was introduced to Europe by Mr. CG van Tubergen in 1913. This iris, dedicated to the Hoog brothers, is characterised by a uniform colouration of all parts of the flower, except for its well-developed golden yellow beards. From a botanical point of view, it is classified in the Iris Regelia section. This plant received an AGM from the Royal Horticultural Society in 1919.
The Hoog Iris has a graceful habit, forming a clump of long, slightly curved green leaves, from which emerge tall flowering stems reaching about 50 centimetres in height. The leaves measure between 35 and 45 cm in length and up to 2 cm in width. The short flowering occurs from April to May, in the form of blue flowers ranging from sky blue to lavender blue and purple-blue. Each flower has three large trailing sepals adorned with a yellow crest and three smaller upright petals. The beard, at the base of each sepal, is a contrasting orange or bright yellow. Each floral stem can bear 2 to 3 flowers at its top. The flower buds are wrapped in an herbaceous sheath tinged with purple at its tip. Its foliage is deciduous, growing in spring and disappearing in autumn.
The Hoog Iris is a versatile plant that easily fits into sunny spots in the garden, both in rockeries and border beds. It pairs well with its cousins, the bearded Iris, lavenders, Sedum spectabile 'Carl', Achillea millefolium 'Cassis', or pink-flowered bushy salvias.
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Plant habit
Flowering
Foliage
Botanical data
Iris
hoogiana
Iridaceae
aril iris
Iris splendens
Central Asia
Planting and care
Do you have a very sunny location, rather dry in summer?
This is the ideal location for planting 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 if it is rather dry and chalky, or even rocky. Soil that is too wet promotes rhizome rot. Plant from July to September. This allows the rhizomes 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 feet per square metre). Always consider the direction of growth of the rhizomes by arranging them in a star shape, with buds and leaves facing outward, and 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 spread-out roots are placed. 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). Take into account that the soil will settle and the iris will sink. In clayey or moist soil, the rhizome can even be raised on a slight mound of a few centimetres. To make the soil cling to the roots, gently firm the soil and water it abundantly immediately after planting. Water 2-3 times if necessary until it takes root.
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 (rot), and attract slugs. Similarly, remove dry leaves. If they are diseased (reddish-brown spots of heterosporiosis), we recommend burning them. Remove faded flowers.
Planting period
Intended location
Care
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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