zone they may in fact not survive through the summer weather. The USDA Hardiness Zone map gives the cold hardiness of the plant. This is great if you are planting a plant from further south that may be cold sensitive. But if you have a plant from further west or north it may survive the cold but not the heat. There is a great web site which will show you a heat zone map. This map will give you a better idea of the heat hardiness of the plant you intend to plant: http://www.ahs.org/pdfs/05_heat_map.pdf
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