The map is based on 30-year averages of the coldest winter temperatures at specific locations, and divides the continental U.S. and Canada into 10 zones, which are further divided into half-zones ...

This winter, the U.S. Department of Agriculture released a new Plant Hardiness Zone Map, considered to be a national standard that gardeners can reference to know which plants are most likely to ...

Sometimes called “growing zones” or “gardening zones,” hardiness zones refer to a map developed by the USDA that separates the United States into regions based on the average low winter ...

The Plant Hardiness Zone Map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones ranging from zone 1 (coldest) to zone 13 (warmest), the USDA notes.

Zones don’t change often—the map was last updated in 201—but when it does change, as it just did, it can upend what you know about your garden. It used to be easier to find your hardiness ...

The U.S. Department of Agriculture’s “plant hardiness zone map” was updated ... One key figure on the map is the lowest likely winter temperature in a given region, which is important ...

The U.S. Department of Agriculture published a new version of its well-known Plant Hardiness Zone map earlier this month ... ability to survive extreme winter cold. And for the U.S., if you ...

In 2023, just over a decade after the last update, the USDA republished the plant hardiness zone map. The average increase in extreme minimum winter temperatures was around 2.5 degrees Fahrenheit ...

The USDA Plant Hardiness Zone Map divides the United States and Canada into 13 zones, based on the average annual minimum winter temperature. Each zone is, on average, 10 degrees warmer or colder ...

The 1990 USDA Hardiness Zone Map may still be the most accurate ... That was proven back in the winter of 1983-84 when we had almost 300 consecutive hours below freezing. It never got crazy ...