Black Flowered Iris 'Black - Flowered'

Iris chrysographes

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: chrysographes (kris-oh-GRAF-ees) (Info)
Cultivar: Black - Flowered
Additional cultivar information:(aka Black Beauty, Black Form, Black, Black Knight, Black Velvet (all invalid names in the RHS Horticultural Database)
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18-24 in. (45-60 cm)


15-18 in. (38-45 cm)


USDA Zone 4a: to -34.4 C (-30 F)

USDA Zone 4b: to -31.6 C (-25 F)

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:

Full Sun


Parts of plant are poisonous if ingested

Bloom Color:

Dark Purple/Black

Bloom Time:

Midseason (M)




This plant is resistant to deer

Other details:

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Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Awards (if applicable):

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Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Flowers are good for cutting

Flowers are fragrant

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Where to Grow:

Unknown - Tell us


This plant has been said to grow in the following regions:


Gardeners' Notes:


On Jul 4, 2010, azulivines from Burnaby, BC (Zone 7b) wrote:

Known as Iris 'Black Form,' this variety of chrysographes iris allures gardeners for its almost-black flowers. Dainty and quite flexible, this iris truly stands out in the gothic black garden. I have not noticed any fragrance, contrary to comments on this iris.

As the flowers are not as large as german iris, this form is used best up-close or in a mass planting. Flowers are in late May-early June.


On Aug 11, 2008, saya from Heerlen
Netherlands (Zone 8b) wrote:

There's only a little information about this Iris. It looks different than the species, it misses the typical yellow markings. According RHS 'black-flowered' is an accepted name. It is often sold as 'Black Form', 'Black', 'Black Velvet', 'Black Knight', 'Black Beauty. These are all synonyms (and also invalid names) for this Iris according RHS.