I'm in Arkansas, so have similar climate although I don't really know much about the soil type since we moved here from Indiana. Figure it's worth a try!
Folk these are A native weed to Florida. Scrub lupine (Lupinus aridorum) http://www.fws.gov/northflorida/Species-Accounts/Scrub-Lupine-2005.htm. Not to be confused with the more common Lupinus L. 165 Species . (http://plants.usda.gov/java/ClassificationServlet?source=profile&symbol=LUPIN&display=31)