The USDA released their newly updated Plant Hardiness Zone Map. The map hadn’t been updated since 1990, and things have definitely changed since then.

In their 2009 report, the US Global Change Research Program predicted that New Hampshire could have a climate similar to present-day North Carolina by 2070 or so. That’s a shift of two or three USDA plant hardiness zones over the next 60 years. That’s a zone shift every 30 years. Possibly faster. That’s an awful lot of change.

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