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PlantFiles: Yellow Flag, Yellow Iris, Water Flag Iris
Iris pseudacorus 'Krill'

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: pseudacorus (soo-DA-ko-rus) (Info)
Cultivar: Krill

» View all varieties of Iris

Class:
Species

Height:
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

Spacing:
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Hardiness:
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
Sun to Partial Shade

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Red
Pale Yellow

Bloom Time:
Midseason (M)

Foliage:
Herbaceous
Burgundy

Other details:
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens

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):
Honorable Mention
Award of Merit
Founders of SIGNA Medal (SPEC)

Click thumbnail
to view:

By Lilypon
Thumbnail #1 of Iris pseudacorus by Lilypon

By EROCTUSE2
Thumbnail #2 of Iris pseudacorus by EROCTUSE2

By BUFFY690
Thumbnail #3 of Iris pseudacorus by BUFFY690

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorContent
Neutral Joan On Jul 17, 2006, Joan from Belfield, ND (Zone 4a) wrote:

American Iris Society Awards: Honorable Mention 2003; Award of Merit 2006; Founders of Signa Medal 2008

Regional...

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

Munsonville, New Hampshire
Croton On Hudson, New York
Prosperity, South Carolina



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