The USDA has updated its hardiness zone map. Simply type in your zip code to see if your area has changed. Mine went from a 5a to a 5b. Interesting.
The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones. A broadband internet connection is recommended for the interactive GIS-based map above.
