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The USDA Plant Hardiness Zone Map (PHZM) shows the 13 hardiness zones throughout the United States (zones 12 and 13 are relatively new additions for Puerto Rico and Hawaii), broken into subzones—for instance, zones 7a and 7b. Data is collected for a 30-year period from 7,983 temperature stations to create the hardiness zone map.
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The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones.
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The lower the number is, the lower the temperatures in that zone. Each zone represents ten degrees of temperature difference. Each zone is also divided into "a" and "b" segments. These represent five degrees of temperature difference. For example, zone 4 represents minimum temperatures between -30 to -20 degrees F. (-34 to -29 C.).
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New USDA Hardiness Zone Map for Illinois. "The magnitude of change in the new maps really surprised me since it just reflects the last 30 years," says Illinois State Climatologist Dr. Trent Ford. The updated maps were released on November 15 and are the first update since 2012. They represent data from 1991-2020 collected by 13,412 weather.
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The USDA Plant Hardiness Zone Map helps gardeners and growers determine which plants are most likely to thrive in their region.
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2010-2039. 2040-2069. 2070-2099. Enter your five digit zip code to learn which hardiness zone your location will fall within: Zip Code. What are Plant Hardiness Zones?
The 2012 USDA Hardiness Zone Map
Canada's plant hardiness zone map, suited for Canada's colder climate, shows nine zones, based on average climatic conditions and altitude of each area. The harshest zone is 0, and the mildest is 8. In addition, the major zones are further divided into subzones. For example, Zone 4 splits into 4a and 4b, where zone a is slightly colder than zone b.
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How many zones are there? The USDA plant hardiness map divides North America into 11 hardiness zones. Zone 1 is the coldest; zone 11 is the warmest, a tropical area found only in Hawaii, coastal Southern California, and southernmost Florida.
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The Hardiness Zone map was adjusted in 2012 to introduce two new zones: 12 and 13. (Prior to this, the range was only 1-11.) The map was updated in November 2023 to indicate a shift by one-half zone warmer for half of the United States, mostly for the Midwest states. Learn more about the most recent changes. If the USDA changed the Hardiness.
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Alberta Average Last Frost Map Florida Average Last Frost Map North Carolina Plant Hardiness Zone Map California Drought Conditions Map Spain Plant Hardiness Zone Map New York Average Last Frost Map Washington Plant Hardiness Zone Map Oregon Plant Hardiness Zone Map Maps: Climate/Weather Maps Interactive US National Drought Conditions Map
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To find your plant hardiness zone, you need a plant hardiness zone map for your area. Plant hardiness zone maps began with the USDA plant hardiness zone map (the link includes Puerto Rico), developed by the US Department of Agriculture. Many other countries use it as well.
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Planting Zone 5. Plant hardiness Zone 5 includes the southern coastal region of Alaska, the North Central United States and portions of New England. With minimum average temperatures between -20 and -10 degrees F, this zone experiences a moderately cold winter. While the growing season is short, you can extend it by using cold frames or using.
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The plant hardiness map is divided into a total of 13 zones with each zone representing a 10-degrees-Fahrenheit range of temperatures. Each zone is further divided into two half zones, with each.
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It's taken more than a decade, but the US Department of Agriculture (USDA) has finally released an updated Plant Hardiness Zone Map that spans the nation and the territory of Puerto Rico in.
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U.S. Department of Agriculture. For example, Seattle, Washington, and the city of Austin, Texas, are both in the USDA hardiness zone 8 because the map is a measure of the coldest temperature a plant can handle. But they're vastly different climates, and the same agave that would thrive in Texas isn't going to like the humidity in Seattle.
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Gardening How To USDA Planting Zones Hardiness Zone Converter: Information On Hardiness Zones Outside U.S. Sign up to our newsletter USDA Hardiness zone map (Image credit: Henry M. Cathey while Director, U.S. Dept of Agriculture) By Bonnie L. Grant last updated October 24, 2022
