Photo by Melody

PlantFiles: Shaga, Crested Iris
Iris japonica

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: japonica (juh-PON-ih-kuh) (Info)

» View all varieties of Iris

One vendor has this plant for sale.

5 members have or want this plant for trade.

Class:
Species

Height:
12-18 in. (30-45 cm)

Spacing:
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)

Hardiness:
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)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Danger:
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color:
Orange
Medium Blue
White/Near White

Bloom Time:
Early midseason (EM)
Midseason (M)
Late Midseason (MLa)

Foliage:
Herbaceous

Other details:
May be a noxious weed or invasive
Average Water Needs; Water regularly; do not overwater

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:
Non-patented

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):
Unknown - Tell us

Click thumbnail
to view:

By Lophophora
Thumbnail #1 of Iris japonica by Lophophora

By Zaragoza
Thumbnail #2 of Iris japonica by Zaragoza

By leemiller38
Thumbnail #3 of Iris japonica by leemiller38

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral Lophophora On Apr 11, 2004, Lophophora from Tokyo
Japan wrote:

This is one of the most common ground covers in suburban Tokyo: the "Lazy Homeowner's Iris". It spreads rapidly by shallow underground stolons and can be invasive, although easily removed. If not maintained, old yellowed leaves gradually build up at the base of the plant and become unsightly, as well as the preferred hiding place for snails and slugs and other ickies.

Regional...

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

,
Anniston, Alabama
Auburn, California
Boca Raton, Florida
Grand Rapids, Michigan
Columbia, South Carolina
Kalama, Washington



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