Siberian Iris
Iris sibirica 'Caesar's Brother'

Family: Iridaceae (eye-rid-AY-see-ee)
Genus: Iris (EYE-ris)
Species: sibirica (sy-BEER-ah-kuh)
Cultivar: Caesar's Brother
Hybridized by Morgan 1932

Siberian (SIB)

36-48 in. (90-120 cm)

18-24 in. (45-60 cm)

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)

Sun Exposure
Full Sun

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

Bloom Color
White/Near White

Bloom Time
Late Midseason (MLa)

This plant is resistant to deer

Other details

Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information

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)
Morgan-Wood Medal (SIB)

Foliage Color

Bloom Characteristics
Flowers are good for cutting
This plant is attractive to bees, butterflies and/or birds

Water Requirements
Average Water Needs; Water regularly; do not overwater

Where to Grow
Grow outdoors year-round
Suitable for growing in containers