Name: Michele Roth N.E. Indiana - Zone 5b, and F (Zone 9b) I'm always on my way out the door..
I haven't grown any of the others, Caroline, but I'd say winter sowing would be a good bet for Bushii, at least.
"Plant Bush's Poppy mallow seeds outside in a prepared bed in summer/fall for germination the next spring. When planting Callirhoe bushii seeds germination may be improved with scarification. Bush's Poppy Mallow seeds have a hard outer shell covering a small hard bean shaped seed. Scarify by rubbing seeds hard between 2 sheets of coarse sandpaper." http://www.easywildflowers.com...
