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Iris Obsidian - Tall Bearded Iris

Iris germanica Obsidian
German Iris, Bearded Iris

3,3/5
2 reviews
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1 reviews
1 reviews

Very happy to have it despite the break-up!!! Thank you.. I hope it takes well, it seems to be in good condition...

anne L., 17/06/2017

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This plant carries a 12 months recovery warranty

More information

Iris Obsidian, a variety of bearded iris that is almost black.
Height at maturity
85 cm
Spread at maturity
40 cm
Exposure
Sun
Hardiness
Hardy down to -15°C
Soil moisture
Dry soil, Moist soil
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Best planting time July to October
Recommended planting time July to October
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Flowering time May
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Description

Iris Obsidian (TB) has dark purple petals with dark purple beards tipped with cream. This bearded Iris brings a touch of originality to the garden.

Everyone knows the Bearded Iris, which has become world-famous thanks to the paintings of Van Gogh and Monet. 

Its wide sword-shaped leaves contrast with crumpled, multicoloured flowers. The flowers have three large upright petals and three silky and trailing sepals, with "beards" and flower for a few weeks in May/June. This Iris has large fleshy rhizomes that creep on the ground. It likes light, heat, and light and well-drained soils. It doesn't mind cold or summer drought, but dislikes moisture, especially in heavy soils. Superb in a sunny border, it is also great for making bouquets.

It is very robust and should be exposed to full sun, in dry and well-drained soil.

Plant Iris Obsidian in a border or flower bed, alongside yarrows, alliums, stipas, or roses. It is better to scatter them in groups of 3 or alone instead of creating uniform iris beds.

Iris Obsidian - Tall Bearded Iris in pictures

Iris Obsidian - Tall Bearded Iris (Flowering) Flowering
Iris Obsidian - Tall Bearded Iris (Foliage) Foliage

Flowering

Flower colour black
Flowering time May

Foliage

Foliage persistence Semi-evergreen
Foliage colour medium green

Plant habit

Height at maturity 85 cm
Spread at maturity 40 cm
Growth rate normal

Botanical data

Genus

Iris

Species

germanica

Cultivar

Obsidian

Family

Iridaceae

Other common names

German Iris, Bearded Iris

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Planting and care

Iris Obsidian should be planted shallowly, with the rhizome exposed at ground level. Add sand if the soil is too heavy or wet and place the rhizomes on small mounds. Ensure good drainage to prevent the iris from rotting. During summer, this iris should be watered 1 to 2 times a month. After flowering, cut the flower stems to 10 cm (4in) from the ground. Damaged leaves should only be removed in autumn. Do not provide too much nitrogen as it increases the number of leaves at the expense of flowers. Taller flower stalks become brittle. The iris can be susceptible to heterosporiosis, a disease identified by oval brown spots on the foliage. Every 4 years in summer, divide the clumps after flowering by pulling out the entire plant and transplanting the most beautiful young plants from the rhizome, usually those on the periphery, to an area which has had no irises for a year.

Planting period

Best planting time July to October
Recommended planting time July to October

Intended location

Suitable for Meadow, Rockery
Type of use Border
Hardiness Hardy down to -15°C (USDA zone 7b) Show map
Ease of cultivation Amateur
Planting density 6 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, Moist soil, Well-drained soil

Care

Pruning instructions Cut the stems at the end of the flowering period. Cut the foliage at a 45-degree (113°F) angle halfway up in summer.
Pruning Pruning recommended once a year
Pruning time July to August
Overwinter Can be left in the ground
3,3/5
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