Posted: 13/09/2013 at 17:36
Have a look on the germination page here.
Astrantia is a cold germinater, outside or cold greenhouse. No heat. They'll germinate in the spring. It's what happens naturally. don't do anything to them other than sow them and put some grit on top. Come feb or March you can bring them in for your benefit so you can see when they germinate.
Done like that is pretty reliable