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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 ...
On the 2012 Plant Hardiness Zone map, Greater Columbus (and a good portion of the rest of Ohio) was in Zone 6a, where the average lowest temperature ranges from -10 to -5 degrees Fahrenheit.
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.
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. In temperate latitudes, the term most often describes resistance to cold, or "cold-hardiness", and is generally measured by the lowest temperature a plant can withstand.
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. [20]
This list provides an overview of United States ecoregions designated by the U.S. Environmental Protection Agency (EPA) and the Commission for Environmental Cooperation (CEC).
Mid-Montane zone, 1,000 – 1,400 m (Eastern Alps), 650 – 800 m (Central Uplands). Limit of the whole year populated areas, limit of a growing season of 100 days. Altimontane zone, 1,300 – 1,850 m (Eastern Alps), 800 – 1,500 m (Central Uplands). Deciduous forests limit, Sycamore Maple (Acer pseudoplatanus) and European Beech (Fagus ...
California Mendocino Ukiah 65.8 3384 Region III Virginia Monticello Charlottesville 66.1 3442 Region III Australia Margaret River Margaret River 66.2 3472 Region III Italy Verona Verona 66.4 3509 Region IV France Languedoc Béziers 66.7 3577 Region IV California Napa Valley St Helena 66.8 3601 Region IV California Northern Sonoma Healdsburg 67.1