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The USDA released a new hardiness zone map and half of the country has shifted. ... their plant hardiness zone map for the ... or only dabble in plants, the USDA creates a 13-zone map to be "the ...
In 2012 the USDA updated their plant hardiness map based on 1976–2005 weather data, using a longer period of data to smooth out year-to-year weather fluctuations. [7] Two new zones (12 and 13) were added to better define and improve information sharing on tropical and semitropical plants, they also appear on the maps of Hawaii and Puerto Rico.
For example, Seattle, Washington, and the city of Austin, Texas, are both in the USDA hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle.
The USDA Plant Hardiness Zone Map includes 13 zones across the United States and is based on 30-year averages for the lowest winter temperature in each region.
A hardiness zone (a subcategory of Vertical Zonation) is a geographically defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone (see the scale on the right or the table below). For example, a plant that is ...
Retrieved from "https://en.wikipedia.org/w/index.php?title=USDA_Plant_Hardiness_Zones&oldid=59860879"https://en.wikipedia.org/w/index.php?title=USDA_Plant_Hardiness_Zones
The USDA released a new hardiness zone map and half of the country has shifted. ... or only dabble in plants, the USDA creates a 13-zone map to be "the standard by which gardeners and growers can ...
Thus a plant's ability to tolerate cold, heat, drought, flooding, or wind are typically considered measurements of hardiness. Hardiness of plants is defined by their native extent's geographic location: longitude, latitude and elevation. These attributes are often simplified to a hardiness zone.