I lost a couple starts that I didn't get in the ground until late September. Other than that, I haven't missed anything yet. Of course, now that I'm actually starting to weed, I'm discovering some vacant real estate. Not from this past winter though, more from years of neglect. I think our winter was pretty mild over here this year - not too cold, not much snow. When we got home in early March all the snow was gone, which was a happy surprise!