For wintersowing, nothing special is needed to germinate snaps. Just sprinkle on top of potting mix , tape the jug, and stick out in the snow. They sprout like weeds, and at low temps. They're always among my first sprouts and don't mind freezing.
They volunteer like weeds, too. I had a few snaps in this area in 2008. These are volunteers there in 2009.
Karen
