Iris Pinnacle - Bearded Iris
Iris Pinnacle - Bearded Iris
Iris Pinnacle - Bearded Iris
Iris Pinnacle - Bearded Iris
Iris germanica 'Pinnacle'
German Iris, Bearded Iris
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Description
Iris 'Pinnacle' is a variety of Garden Iris that caused a sensation when it was presented after the Second World War. Its large yellow and white flowers exude rediscovered happiness, like a spring smile. The plant forms beautiful clusters of light in the garden, at the heart of the iris season.
'Pinnacle' Iris is a rhizomatous perennial that forms upright clusters. Its deciduous foliage disappears in autumn and reappears in spring. This plant belongs to the Iridaceae family. It is one of the many cultivars obtained over centuries, whose controversial origin is debated around the number of chromosomes of potential ancestors. It should be noted that Garden Irises have European origins.
'Pinnacle' Iris reaches a height of 90 cm (35in) when in bloom. Each rhizome produces branched stems that bear several flower buds. The cluster spreads very quickly, theoretically unlimited over time, with the central rhizomes becoming bare in favour of the outer rhizomes. The foliage consists of long sword-shaped leaves, glaucous green and prominently veined. Floral stems appear in April and flower in May, in the middle of the tall iris season, blooming from the top to the lower branches. Each beautifully shaped flower consists of 3 upright petals of pure white, 3 drooping sepals of primrose yellow, slightly striped with white towards the throat, and 3 beards with a white base and a lemon-yellow tip. The very fresh colour is magnified by the thick and iridescent texture of the petals and sepals.
Obtained by Jean Stevens in 1945 - Awards: Honorable Mention in 1949, Award of Merit (A.G.M) in 1951.
To accompany irises, choose plants based on their needs (exposure, soil...), their vegetation (low plants or light foliage, non-competitive plants), and their decorative complementarity (appearance, flowering date). For example, Gauras will cast little shade on the irises and will keep the faded iris bed attractive throughout the summer. California Poppies and Love-in-a-Mist will tolerate the same dry soil as the irises in summer. Perennial geraniums, salvias, and Libertia also accompany irises very well. Slopes, the base of small trees with light foliage, and the edges of terraces will be stabilized by a dense planting of old varieties that require little care. If the goal is more decorative and access for maintenance is possible, modern varieties can be chosen, such as intermediates that are less likely to be flattened by wind and rain.
The vegetable garden can be adorned with a few clusters or borders of irises for cut flowers.
Iris Pinnacle - Bearded Iris in pictures
Flowering
Foliage
Plant habit
Botanical data
Iris
germanica
'Pinnacle'
Iridaceae
German Iris, Bearded Iris
Cultivar or hybrid
Planting and care
Do you have a very sunny location, rather dry in the 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 dry and chalky, or even stony. Soil that is too wet promotes rootstock rot. Plant from July to September. This allows the rootstocks to establish new roots before winter. They should be planted as soon as they are purchased for best results. Plan to divide the irises every 4 years or so to give them fresh soil. They have strong growth and require space to develop and flower well. Plant with spacing adapted to the size and vigour of the variety: approximately 34-50 cm (13-20in) for tall ones. Always consider the direction of growth of the rootstocks by arranging them in a star shape, with buds and leaves facing outward, and spacing them well from other varieties so they have room to develop.
Planting
Dig a hole that is wide and deep enough. Make a conical mound of soil in the hole, on which the rootstock and spread-out roots are placed. Cover the roots. It is important for the rootstock to be at the surface of the soil. It should not be planted in a basin (risk of rot). Take into account that the soil will settle and the iris will sink. In clayey or humid soil, the rootstock can even be left on a slight mound of a few centimetres. To make the soil adhere to the roots, lightly compact and water well immediately after planting. Water 2-3 times if necessary until establishment.
Maintenance:
Keep the soil free from weeds by shallow hoeing, taking care not to damage the rootstocks or roots. Weeds shade the irises, retain moisture (rot), and attract slugs. Likewise, remove dry leaves. If they are diseased (reddish-brown-bordered 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).
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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.