http://www.arborday.org/media/map_change.cfm" target="_blank
I used to be in zone 5 and planted accordingly. This year I wondered if perhaps they'd changed the frost free date a tad over the years. To my surprise, I'm now in a whole different climate zone! I could have put out tomatoes last weekend. I should have planted just about everything 3 weeks sooner than I did.
ACKK! Must till garden! Must plant stuff! Everything can be planted *now* instead of 3 weeks from now like I'd planned.