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The USDA released a new hardiness zone map and half of the country has shifted. ... You simply type in your zip code and it gives you zoomed in, color-coded view of your area, complete with what ...
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 new map is based on 30-year averages of the lowest annual winter temperature in a particular location. The 2023 map incorporates data from 13,412 weather stations around the country compared ...
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.
New York State growing seasons have significant variations depending on the region. The Adirondacks, which encompasses hardiness zones 3 to 4, have the shortest growing season. Central New York, Western New York, the Catskills, and Mid-Hudson Valley encompass growing zones 5 to 6 and have much longer growing seasons and therefore more agriculture.
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.
You can check out your zone rating by going to planthardiness.ars.usda.gov/ and entering your zip code. What does the cold hardiness map measure? The polar vortex hit Louisville Wednesday, Jan. 30 ...
Hopkins' bioclimatic law states that in North America east of the Rockies, a 130-m (400-foot) increase in elevation, a 4° change in latitude North (444.48 km), or a 10° change in longitude East (two-thirds of a time zone) will cause a biological event to occur four days later in the spring or four days earlier in the fall. [1]
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