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

Irisvirginica

Family
Iridaceae (eye-rid-AY-see-ee)
Genus
Iris (EYE-ris)
Species
virginica (vir-JIN-ih-kuh)
Synonym
Iris caroliniana
Iris convoluta
Iris georgiana
Iris shrevei
Iris virginica var. shrevei
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
Class
Allow pods to dry on plant; break open to collect seeds
Seed does not store well; sow as soon as possible
Bloom Time
Other Details
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
Awards (if applicable)
Foliage Color
Bloom Characteristics
Perennials
Ponds and Aquatics
Water Requirements
Where to Grow
Regional

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

Trinity, Alabama

Geneva, Illinois

Hinsdale, Illinois

Yorkville, Illinois

Iowa City, Iowa

Louisville, Kentucky

Coushatta, Louisiana

Belleville, Michigan

Lake Toxaway, North Carolina

Crossville, Tennessee

Brazoria, Texas

Houston, Texas

Pearland, Texas

Virginia Beach, Virginia

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Featured Videos

Gardener's Notes:

4
positives
0
neutral
0
negative
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J
Southeast, WI | January 2016 | positive

This is one of my favorite Spring blooms. It's one of the first plants I see emerging after the snow melts. Early on, it's leaves are a n...Read More

J
Collierville, TN | May 2015 | positive

Mine is growing nicely in my left back porch.

R
R
Puyallup, WA (Zone 8b) | April 2013 | positive

I purchased mine last year at Mercer Arboretum's annual March Mart plant sale. They had a section of native plants and this was included....Read More

G
Geneva, IL | September 2011 | positive

The Blue Flag Iris used to grow along the Fox River (zone 5) in Illinois. It got crowded out by non-native species. The Wildflower Sanctu...Read More

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