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The map is a graphic representation of the United States broken into 26 zones based on average annual minimum temperature. ... and simplified the effort with their first USDA Cold Hardiness Zone ...
For practical purposes, Canada has adopted the American hardiness zone classification system. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. [8] The Canadian government publishes both Canadian and USDA-style zone maps. [37]
Devised by the United States Department of Agriculture (USDA), ... Texas, are both in the USDA hardiness zone 9a because the map is a measure of the coldest temperature a plant can handle. But ...
According to the new map released in November 2023, about half of the United States has shifted to a new hardiness zone. That's really big news if you consider 80 million Americans use this map to ...
Various hardiness ratings are published. In the United States (US), the most widely used is the U.S. Department of Agriculture (USDA) system of hardiness zones based on average minimum yearly temperatures. [4] This system was developed specifically for the extremely diverse range of conditions in the US, from baking desert to frozen tundra.
In the United States, the EPA and the United States Geological Survey (USGS) are the principal federal agencies working with the CEC to define and map ecoregions. Ecoregions may be identified by similarities in geology , physiography , vegetation , climate , soils , land use , wildlife distributions, and hydrology .
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USDA Zone 10A, with annual average lows between 30°F and 35°F, is found in the rest of South Florida, and in certain coastal regions as far north as St. Petersburg on the western coast of the state, and roughly Vero Beach on the eastern coast of the state. USDA Zone 9B, with average annual lows between 25°F and 30°F, is found in interior ...