Hardiness Zones 101 The USDA Plant Hardiness Zone Map consists of 13 individual zones that take in all of the contiguous United States, plus Alaska, Hawaii, and Puerto Rico. The first zone lies at ...

The map was updated for the first time in a decade, and it shows the impact that climate change will have on gardens and yards across the country. USDA via AP / AP 00:00 / 19:21 ...

As of the most recent release, the November 2023 map has the US broken into 13 cold hardiness zones in 10-degree Fahrenheit intervals, with each zone further broken into “a” (the warmer half ...

According to the USDA, the map is also based on 30-year averages of the lowest annual winter temperatures at the specific locations, and split into 10-degree and 5-degree zones and integrates data ...

There are 13 full zones (with 1 being the coldest and 13 being the warmest). Each full zone is also divided into half zones. The USDA draws the map using a color-coded key for easier reference.

The map, available at planthardiness.ars.usda.gov, was previously updated in 2012, and the new, more detailed version is based on 30-year averages of the lowest annual winter temperatures from ...

Plant hardiness zones are based on 30-year averages of weather extremes (coldest temperatures). Climate changes are based on overall annual average temperatures over 50-100 years. Source: USDA New ...

The “Plant Hardiness Zone Map,” an update of a 1990 static version, shifts temperatures up one 5-degree increment across much of the country, reflecting newer and more complete data, the USDA ...

The 2023 map incorporated data from more than 13,000 weather stations compared to the 8,000 that were used for the 2012 map. The maps highlighted 13 different zones around the country in 5-degree ...

Colorado gardeners eyeing the U.S. Department of Agriculture’s updated Plant Hardiness Zone Map, which moves much of the state in a warmer growing zone, should hold their horses — or trowels — before ...

USDA spokeswoman Kim Kaplan, who was part of the map team, repeatedly tried to distance the new zones in the map from global warming issues. She said even though much of the country is in warmer ...