Siberian Iris 'Countess Cathleen'

Irissibirica

Family
Iridaceae (eye-rid-AY-see-ee)
Genus
Iris (EYE-ris)
Species
sibirica (sy-BEER-ah-kuh)
Synonym
Spacing
24-36 in. (60-90 cm)
Hardiness
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Sun Exposure
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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
Danger
Full Sun
Sun to Partial Shade
Bloom Color
Parts of plant are poisonous if ingested
Foliage
Light Blue
White/Near White
Class
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Bloom Time
Other Details
Other details
Propagation Methods
Herbaceous
Seed Collecting
Soil pH requirements
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Patent Information
Awards (if applicable)
Foliage Color
Bloom Characteristics
Water Requirements
Where to Grow
Regional

This plant is said to grow outdoors in the following regions:

Carlisle, Massachusetts

Shelburne Falls, Massachusetts

Vancouver, Washington

Featured Videos

Gardener's Notes:

1
positive
1
neutral
0
negative
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C
ROSLINDALE, MA | January 2015 | positive

The breeders, Marty Schafer and Jan Sacks, have written:

"Pale blue falls blend into clean white signals with dark blue ve...Read More

J
J
Belfield, ND (Zone 4a) | December 2005 | neutral

Awards: American Iris Society Honorable Mention '01

Featured
Barred Bee fly
(Exoprosopa fasciata)
White-winged Dove
(Zenaida asiatica)
Featured
Barred Bee fly
(Exoprosopa fasciata)
White-winged Dove
(Zenaida asiatica)