Welcome To Your New Gardening Zone / / No Comments In November of last year the US Department of Agriculture (USDA) updated the US plant hardiness map based on the latest weather data (1991–2020). The USDA Plant Hardiness Zone Map is a tool which is designed to help gardeners determine which plants are most likely to thrive in their location. The USDA map is divided into 13 zones based on average coldest temperatures. Zone 1 is Maps Mania… more → Posted in: Interactive Maps Tagged with: Gardening, Welcome, Zone