Some of the mignonettes available in the United States are really quite stunning. Texas Bluebonnets, Lupines and Larkspur are the most well known and when well established, can cover hills and mountainsides. Unfortunately, none of them grow well in the deep south. 

Texas Bluebonnets will start blooming soon in March, and many people drive hundreds of miles to see them.

Just now, drpaladin said:

Deep South is an damnably elusive term to translate since it can apply to a varying number of states. Even west Tennessee qualifies to some, and then throw in Texas and Florida for kicks.

The difference in this case is elevation. Lupine, Bluebonnet and Larkspur all belong to the family Fabaceae and are related to peas and beans. They can't handle hot, humid low-land conditions.

There's a line in Tom Petty's song "Free Fallin'": It's a long day livin' in Reseda.

This town in the San Fernando Region of Los Angeles, California, was named after the plant Reseda odorata, known by many common names including Mignonette, Garden Mignonette, Common Mignonette, Egyptian Mignonette. It probably originated in the Mediterranean Basin, but it can be found growing wild or as an introduced species in many parts of the world.