Species Iris, Giant Blue Iris, Giant Blue Flag
Irisgiganticaerulea

Synonym:Iris aurilinea

Synonym:Iris citricristata

Synonym:Iris elephantina

Synonym:Iris fluviatilis

Synonym:Iris miraculosa

Height

Spacing
4-6 ft. (1.2-1.8 m)

Hardiness
9-12 in. (22-30 cm)

Sun Exposure
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)
USDA Zone 10a: to -1.1 °C (30 °F)

Danger
Full Sun
Sun to Partial Shade

Bloom Color
Parts of plant are poisonous if ingested

Foliage
Pale Pink
Pink
Rose/Mauve
Light Blue
Dark Blue
Medium Blue
Blue-Violet
Lavender
Medium Purple
White/Near White

Other details

Propagation Methods
Herbaceous

Seed Collecting
May be a noxious weed or invasive

Soil pH requirements
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Patent Information

Class
Allow pods to dry on plant; break open to collect seeds

Bloom Time

Awards (if applicable)

Foliage Color

Bloom Characteristics
Perennials

Water Requirements

Where to Grow