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The USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which perennial plants are most likely to thrive at a location. The map is based on the average annual extreme minimum winter temperature, displayed as 10-degree F zones and 5-degree F half zones.
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View the new 2023 California Hardiness Zone Map. Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of California which ranges from USDA Zone 4b to USDA Zone 11a.
15 lis 2023 · USDA’s Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. The new map—jointly developed by USDA's Agricultural Research Service (ARS) and Oregon State University's (OSU) PRISM Climate Group—is more accurate and contains greater detail than prior versions.
Using the 1990 USDA Hardiness Zone classifications, this updated interactive version covers the state of California and was compiled using National Weather Service climate data through 2009 and covering a broader time frame than the 30 year range used in the current USDA map.
California Plant Hardiness Zones. Hardiness Zones, also referred to as Growing Zones or Planting zones are defined by the U.S. Department of Agriculture (USDA) Agricultural Research Service (ARS). The zones in this map were created in 2023 using mean extreme climate data covering the period of 1991 to 2020.
22 gru 2023 · Learn More About The Map Of USDA Hardiness Zones For Plants & Trees In California. This planting zone map is based on the 2023 USDA plant hardiness map, which was adjusted for the warmer temperatures that have occurred over the past few decades.
Zone 1 is the coldest; zone 11 is the warmest. When you order plants from catalogs or read general garden books, you need to know your USDA zone in order to be able to interpret references correctly. The Arbor Day Foundation has also issued a Hardiness Zone Map .
