Species Iris, Virginia Iris, Great Blue Flag, Southern Blue Flag
Irisvirginica

Synonym:Iris caroliniana

Synonym:Iris convoluta

Synonym:Iris georgiana

Synonym:Iris shrevei

Synonym:Iris virginica var. shrevei

Height

Spacing
24-36 in. (60-90 cm)

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

Sun Exposure
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

Bloom Color
Parts of plant are poisonous if ingested

Foliage
Blue-Violet

Other details

Propagation Methods
Evergreen
Herbaceous

Seed Collecting
May be a noxious weed or invasive

Soil pH requirements
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Patent Information

Class
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible

Bloom Time

Awards (if applicable)

Foliage Color

Bloom Characteristics
Perennials
Ponds and Aquatics

Water Requirements

Where to Grow