Hardiness zone ratings best weapon against cold damage

With the chance of frosts passed and new plants going into the landscape, it’s important to consider the climate extremes that your plant can tolerate before putting it in the ground. The primary map used to determine the suitability of a plant for an area is the USDA Hardiness Zone map. This shows the average minimum temperature in our area. Plants rated as suitable for Zone 6b should surviv...

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