It was months ago that I decided to attempt starting perennial seeds by using a winter sowing method that I had read about in my Northern Gardener magazine. I posted (here) about getting everything set up and flower seeds planted in these plastic milk jugs in the dead of winter.
Over the next few months, I set the milk jugs out in the snow and let nature take its course. As things started to warm up in the spring, I opened the jugs up during the day to allow the germination process to start, triggered by the moisture and warm rays of sunshine. The seeds eventually started to sprout and I had lots of little seedlings.