Iris chrysographes Black Knight - Black Iris
Iris chrysographes Black Knight - Black Iris
Iris chrysographes Black Knight - Black Iris
Iris chrysographes Black Knight
Black Iris
Planted at the recommended season, good establishment, flowered in late October (slightly later than indicated), the flower is a darker violet than black.
Michèle, 07/11/2021
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Description
Iris chrysographes Black Knight is one of those rare perennials that has unique intensely black flowers!
The Black Knight Iris forms a rhizomatous clump that spreads slowly. In spring, it produces slender lanceolate leaves, 2cm (1in) wide and 30cm (12in) tall, in a lovely tender green colour. From June to September, it bears beautiful architectural flowers with deep black petals, perched at 50cm (20in) in height.
Very hardy and easy to grow, the Iris chrysographes Black Knight thrives in full sun or partial shade in moist, rich, clayey soil. Plant it on the banks of a pond or at the edge of a moist border. Its black and upright flowers create stunning contrasts with white-flowered perennials. Plant it with Astrantias, 'Annabelle' Hydrangeas, or Hostas.
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Iris chrysographes Black Knight - Black Iris in pictures
Flowering
Foliage
Plant habit
Botanical data
Iris
chrysographes
Black Knight
Iridaceae
Black Iris
Cultivar or hybrid
Planting and care
Iris chrysographes Black Knight likes moist or even damp soils in summer but without excessive water in winter. Plant it in full sun or partial shade in a rich, clayey and deep soil. Very hardy, it can withstand temperatures as low as -15°C (5°F) without any issues. Plant it alongside astrantias, persicarias and hostas.
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).
The flowering period indicated on our website applies to countries and regions located in USDA zone 8 (France, the United Kingdom, Ireland, the Netherlands, etc.)
It will vary according to where you live:- In zones 9 to 10 (Italy, Spain, Greece, etc.), flowering will occur about 2 to 4 weeks earlier.
- In zones 6 to 7 (Germany, Poland, Slovenia, and lower mountainous regions), flowering will be delayed by 2 to 3 weeks.
- In zone 5 (Central Europe, Scandinavia), blooming will be delayed by 3 to 5 weeks.
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 planting period indicated on our website applies to countries and regions located in USDA zone 8 (France, United Kingdom, Ireland, Netherlands).
It will vary according to where you live:
- In Mediterranean zones (Marseille, Madrid, Milan, etc.), autumn and winter are the best planting periods.
- In continental zones (Strasbourg, Munich, Vienna, etc.), delay planting by 2 to 3 weeks in spring and bring it forward by 2 to 4 weeks in autumn.
- In mountainous regions (the Alps, Pyrenees, Carpathians, etc.), it is best to plant in late spring (May-June) or late summer (August-September).
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.
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