Hardiness zone
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High Quality Content by WIKIPEDIA articles! A hardiness zone is a geographically-defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone. The zones were first developed by the United States Department of Agriculture and have subsequently been adopted elsewhere. For example, a plant that is described as "hardy to zone 10" means that the plant can withstand a minimum temperature of -1°C. A more resilient plant that is "hardy to zone 9" can tolerate a minimum…mehr

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High Quality Content by WIKIPEDIA articles! A hardiness zone is a geographically-defined area in which a specific category of plant life is capable of growing, as defined by climatic conditions, including its ability to withstand the minimum temperatures of the zone. The zones were first developed by the United States Department of Agriculture and have subsequently been adopted elsewhere. For example, a plant that is described as "hardy to zone 10" means that the plant can withstand a minimum temperature of -1°C. A more resilient plant that is "hardy to zone 9" can tolerate a minimum temperature of -7°C. The hardiness zones are informative in that the extremes of winter cold are a major determinant of whether a plant species can be cultivated outdoors at a particular location; however, the USDA hardiness zones have a number of drawbacks if used without supplementary information. The zones do not incorporate summer heat levels into the zone determination; thus sites which may havethe same mean winter minima, but markedly different summer temperatures, will be accorded the same hardiness zone.