|Updated once every several years to a few decades, the USDA has released an interactive GIS-based hardiness zone map for 2012. It is also available in static image form for slower connections.
A half zone increase may not sound like much - it reflects a 5 degree change - but with first and last frost times so critical, one or two weeks could make a difference between plant life and death.
Stuck in-between zones and not sure which zone you belong to? No problem -- just type in your zip code and it will tell you.
Currently, the USDA has not printed any posters of this new 2012 map, but you can download state, regional and national maps in a variety of resolutions and print them yourself.
Interactive version for higher speed internet connections
Static version for slower internet connections