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January 5, 2024 at 2:04 AM. ... After a few iterations, USDA scientists revised, updated, and simplified the effort with their first USDA Cold Hardiness Zone Map published in 1960. This map, now ...
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.
A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations. The original and most widely used system, developed by the United States Department of Agriculture (USDA) as a rough guide for ...
The 2023 USDA plant hardiness zone map, which shows which areas of the country are suitable for growing plants and crops based on the lowest temperatures during the growing season.
Hardiness of plants describes their ability to survive adverse growing conditions. It is usually limited to discussions of climatic adversity. 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 ...
According to the most recent USDA Hardiness zone maps, the lowland areas of the county fall into Zone 8a, with an expected annual minimum temperatures of 10 to 15 °F (−12 to −9 °C), while higher elevation and inland areas fall into Zone 7b, with expected annual minima of 5 to 10 °F (−15 to −12 °C).