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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 released a new hardiness zone map and half of the country has shifted. ... according to data collected by over 13,000 weather stations across the U.S. ... using the new map can help set ...
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.
Here’s the thing most people miss with the whole cold hardiness map thing. The zones represent mean annual minimum temperature, not the minimum temperature.So in my now zone 7a Kentucky garden ...
In 2006, the US National Arbor Day Foundation completed an extensive updating of U.S. Hardiness Zones. It used essentially the same data as the AHS. Once the Foundation analyzed the new data, it revised hardiness zones, reflecting the generally warmer recent temperatures in many parts of the country. The Foundation's 2006 map appears to ...
English: map of USDA plant hardiness zones across Europe Deutsch: Karte der USDA-Klimazonen in Europa Français : carte des zones de rusticité des plantes selon l'USDA en Europe
An updated plant hardiness zone map released by the USDA last month shows nearly half of the country is now classified in a "warmer" zone than it used to be. That includes parts of Southeastern N.C.
Soil and Water Assessment Tool (SWAT) is a free and open source hydrology model and GIS computer simulation sponsored by the USDA. SWAT is a well known geographic hydrological model in use by many universities and government agencies around the world, and integrates with commercial products like ArcGIS .