Photo by Melody

PlantFiles: Shreve's Iris, Southern Blue Flag
Iris virginica var. shrevei

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Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Iris (EYE-ris) (Info)
Species: virginica var. shrevei

Synonym:Iris shrevei
Synonym:Iris versicolor var. blandescens
Synonym:Iris versicolor var. shrevei

» View all varieties of Iris

3 vendors have this plant for sale.

9 members have or want this plant for trade.

Class:
Species

Height:
24-36 in. (60-90 cm)

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

Hardiness:
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

Danger:
Parts of plant are poisonous if ingested

Bloom Color:
Blue-Violet

Bloom Time:
Late Midseason (MLa)

Foliage:
Evergreen
Herbaceous

Other details:
May be a noxious weed or invasive
Flowers are fragrant
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens

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

Patent Information:
Non-patented

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

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

Awards (if applicable):
Unknown - Tell us

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By hawkarica
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There are a total of 13 photos.
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Profile:

2 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive rntx22 On Apr 2, 2013, rntx22 from Houston, TX (Zone 9a) wrote:

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. They are trying to promote gardeners to grow more native plants.
I have found this plant much easier to grow than other irises I own. It is currently blooming prolifically. Each bloom only lasts a day or two but each stalk produces multiple rounds of blooms.
I have it planted in a bed that sometimes gets waterlogged after several days of hard rain (the reason why i chose this plant for this site). The rest of the time I just water it when I'm out watering all my plants. It has done fine in both conditions, though does look better with more water.

Positive geneva_illinois On Sep 16, 2011, geneva_illinois from Geneva, IL wrote:

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 Sanctuary in Batavia IL (check out the plants on their web site) is restoring Iris Virginica to the river banks and so are some of the residents along the Fox River like I am. You mostly see the Yellow Flag Iris in this area.

Regional...

This plant has been said to grow 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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