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 ...

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.

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.

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 ...

Across the lower 48 states, the lowest likely winter temperature overall is 2.5 degrees warmer than when the last map was published in 2012, according to Chris Daly, a researcher at Oregon State ...

Map developers from USDA and Oregon State University, updated the plant hardiness zoning for half of the country based on 30 years of climate data.

Zone 9 and 10. These hardiness zones have average minimum winter temperatures between 20 degrees Fahrenheit and 40 degrees Fahrenheit, meaning many of the native plants are heat-loving and perfect ...

The plant hardiness map is divided into a total of 13 zones, each zone representing a 10-degrees-Fahrenheit range of temperatures. Each zone is further divided into two half zones (a and b), with ...

New Plant Hardiness Zone Map doesn’t reflect what happens in Texas most winters ... That was proven back in the winter of 1983-84 when we had almost 300 consecutive hours below freezing.