Can you help me understand hardiness zones? - Cooperative Extension: Garden and Yard - University of Maine Cooperative Extension

Question: I’m out in Bethel, and I’m looking at buying some trees, both fruit, and landscaping. I’m trying to understand some things about hardiness zones. We’re in zone 4 (I think), though we’re not far from Zone 5, but when I look at record low temperatures in Bethel, they’re well above -20F (which is minimum read more