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
Registered or introduced: 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

Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


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

Beacon Falls, Connecticut

Concord, North Carolina

Gardeners' Notes:


On Jan 10, 2013, themikesmom 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 Spr... read more