You have to send SASE(two stamps) and do a few quizzes before you get to the printout page to send in.
They send six packs of seeds ~ their choice of varieties.

As of March 1, 2009, all free seed requests must contain a printout of the dated seed offer address page. If more than seven days lapse between the printout calendar date and the envelope cancellation date the request is invalid.

SASEs without the required printout will not be honored and will be returned with a consolation packet and reminder that the page printout is needed to receive seeds.

WinterSown.Org ~ The Authoritative Site for Winter Sowing Information.

Free Seeds for Winter Sowing