I raise monarchs every year and I would love to have my own supply of swamp milkweed. Any resource out there for this plant?

Jan, Swamp Milkweed (Asclepias incarnata) sure is a beautiful plant. I found a couple of vendors who carry it:

Lazy S's Farm Nursery: http://www.lazyssfarm.com/Plan...
You can read member recommendations for them here:

High Country Gardens: http://www.highcountrygardens....
You can read member recommendations here: High Country Gardens

American Meadows: http://www.americanmeadows.com...
You can read member recommendations for them here: American Meadows