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USDA Plant Hardiness Zone Chart This USDA hardiness zone chart can be used to to indicate a plant’s ability to withstand average minimum temperatures.  However, other factors such as soil type, moisture, drainage, humidity and exposure to sun and wind will also have a direct effect on your plant’s survival.  Use this chart only as a guide, always keep the other factors in mind when deciding where, when and what to plant. Don't forget most tropicals can be container grown anywhere if  brought in for the winter.

Average Minimum Temperature

Zone 1 Below -50    Zone 2 -50 to -40    Zone 3 -40 to -30    Zone 4 -30 to -20    Zone 5 -20 to -10    Zone 6 -10 to -0    Zone 7 0 to 10    Zone 8 10 to 20    Zone 9 20 to 30    Zone 10 30 to 40    Zone 11 30 to 40    Zone 12 Above 50

 

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