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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 ...
How many zones are in the USDA cold hardiness map? A shaded pathway at Yew Dell Botanical Gardens leads to the Castle Terrace, a stone castle that was hand-built in the 1950's. June 14, 2022
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.
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]
The USDA rejected the AHS 2003 draft map; the agency stated it would create its own map in an interactive computer format. As of August 2010 the AHS and the National Arboretum websites still present the 1990 map as current. In 2006, the US National Arbor Day Foundation completed an extensive updating of U.S. Hardiness Zones. It used essentially ...
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.
Learn what plant hardiness zone you're in and the best plants for your region. Skip to main content. Lifestyle. 24/7 help. For premium support please call: 800-290 ...
According to the United States Department of Agriculture, the Plant Hardiness zone is 3b with an average annual extreme minimum temperature of −30.7 °F (−34.8 °C). [7] Summers are warm with chilly nights in the 30s and 40s (°F) and some thunderstorm activity during the months of July and August. Winters are cold and dry with lows below zero.