Photo by Melody

PlantFiles: Species Iris, Intermediate Bearded Iris
Iris kochii

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: kochii
Additional cultivar information: (aka Kochi, Atroviolaceae)
Hybridized by Kerner; Year of Registration or Introduction: 1887

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Intermediate Bearded (IB)

24-36 in. (60-90 cm)

15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
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)

Sun Exposure:
Full Sun
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:

Bloom Time:
Early (E)


Other details:
Unknown - Tell us

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

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

Seed Collecting:
Unknown - Tell us

Awards (if applicable):
Unknown - Tell us

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By themikesmom
Thumbnail #1 of Iris kochii by themikesmom

By themikesmom
Thumbnail #2 of Iris kochii by themikesmom

By themikesmom
Thumbnail #3 of Iris kochii by themikesmom

By themikesmom
Thumbnail #4 of Iris kochii by themikesmom


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive themikesmom On Jan 10, 2013, themikesmom from Concord, NC wrote:

I.Kochii is a fast multiplying Early blooming historic purple iris that is found in many older gardens in England and mainly the Eastern United States. It is one of the only few iris that is both recognized as a IB iris [Intermediate Bearded Iris] and an Species iris. It was first collected by Anton Joseph Kerner in Italy and then correctly described and registered for him by Otto Stapf in 1887, later in 1918 it was added to the list of recognized IB iris by Farr and then officially in the 1939 iris checklist. It gets 26 inches tall and is not only an Early bloomer, but one of the few bearded iris that actually thrives in, and seems to enjoy, partial shade, and thus does great in rock gardens and alpine environments, where it is often seen in decent sized patches and clumps in the late Spring. It is quite similar and often grown along with, Crimson King, which has a more reddish tinge to its purple color than Kochii, I.germanica, Dorothea, and especially Eleanor Roosevelt which it looks about 90% identical too, and can be mistaken for easily. Also known as 'Atroviolacea' it is slightly darker than '' 'Atropurpureae' Purple King' ''


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

Beacon Falls, Connecticut
Concord, North Carolina

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