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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.
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.
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.
These maps show a scale, or index of greenness, based on several factors: the number and type of plants, leafiness, and plant health. Where foliage is dense and plants are growing quickly, the index is high, represented in dark green. Regions with sparse vegetation and a low vegetation index are shown in tan.
Level IV mapping is still underway but is complete across most of the United States. For an example of Level IV data, see List of ecoregions in Oregon and the associated articles. The classification system excludes the U.S. state of Hawaii, which is not part of the North American continent.
Winter is cool with occasional rain storms and snow showers. January daily high temperatures are usually between 50–60 °F (10–16 °C) with lows just below freezing. On average, the lowest winter temperature is 14 °F (−10 °C), putting the area in hardiness zone 8A. Spring starts slowly but then gets warmer in April and is usually a ...
Melissa is a city in Collin County, Texas, United States. The population was 4,695 at the 2010 census, [ 4 ] up from 1,350 at the 2000 census; in 2020, its population grew to 13,901. [ 5 ]
All 3 articles are stubs and overlap. Let's consolidate the info into a meaningful article. -- P199 13:52, 5 May 2006 (UTC) [] Support - Merging 3 stubs into 1 actual article sounds like a good plan :) I'm hoping to add some content and several links, but I don't want to start until after they merge (If they merge).
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