Kenneth J. Sytsma from Wisconsin State Herbarium website
 

Common Name	Blue Flag Iris
Scientific Name	Iris virginica shrevei
Height	2'-3'
Sun/Shade	Sun - partial shade
Bloom Season	May - July
Bloom Color	Blue
Soil	Moist to wet. Found in marshes and wet prairies.
Disease Susceptibility	Mosiac virus - discard plants infected with streaking and necrosis.
Propagation	Pollinated by bees and Diptera http://nativeplants.for.uidaho.edu/network/view.asp?protocol_id=273
Notes	Divide every 3-5 years.  Beautiful flower!

 
 

	Prairie Nursery	Heartland Restoration	Enders	Taylor Creek	Possibility Place
Costs	3 yr bare root  1-3 $3.95ea.  4-11 $2.95ea.  12-31 $2.75ea.  32-63 $2.25ea.  64-95 $1.95ea.  96+ $1.75 ea  1,400seeds/oz 1/8oz.-$7.50  1/4oz.-$10.00  1/2oz.-$15.00  1oz.-$25.00  1lb.-$375.00	9.00/oz, 135.00/lb	Native plant retail prices:  ½ pint - 2.35, pint - 3.40,  quart - 4.75,  ½ gallon - 5.95,  gallon - 7.50 & up.	11.75/oz 1.75/plant	Flat of 32 -  $37.00    2" plug - $2.25 each    gallons - $4.75

Information on Iris virginica shrevei:
- USDA's PLANTS database. Plant Profile: http://plants.usda.gov/plants/cgi_bin/topics.cgi?earl=fact_sheet.cgi
- Wisconsin State Herbarium - http://wiscinfo.doit.wisc.edu/herbarium/scripts/detail.asp?SpCode=IRIVIRvSHR
- List of Roadside Native Plants for Illinois - http://www.inhs.uiuc.edu/~kenr/prairietable1.html
- Landscaping with Plants Native to Indiana. (pamphlet). November 1999.
- Cullina, Willaim. The New England Wild Flower Society Guide to Growing and Propagating Wildflowers of the United States and Canada.  Boston: Houghton Mifflin Co, 2000.