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USDA Plant Hardiness Zone Map 2012

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USDA Plant Hardiness Map

The USDA plant hardiness map was developed by the United States Department of Agriculture - ARS Division with the assistance of the Oregon State University Prism Climate Group in 2012. This is the first update done on the USDA map in many years.

USDA Plant Hardiness Zone Map For 2012

Based on average annual extreme minimum winter temperatures.

The USDA Hardiness map is simply a map that estimates the lowest temperatures possible in a given area. A lot of factors including altitude, wind exposure, proximity to water, snow cover, soil types and location in mountainous terrain (valley, North, South locations) have effects on the annual temperatures. These factors can change the hardiness zone as much as 2 zones difference. This applies both for plants that do best in cool weather and in hot weather, with the growing zone being extended based on all the factors.

It is for the above reasons that we recommend a grass climate map, as well as other maps, when deciding on the type of grass you plan to plant.

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