Search by Botanical name: USDA plant-hardiness-Zone:  10:   30 to 40°F   -1 to +4.5°C   9:   20 to 30°F   -6.5 to -1°C   8:  10 to 20°F   -12 to -6.5°C   7:    0 to 10°F   -17.5 to -12.5°C   6:   -10 to 0°F   -23.5 to -18°C   5: -20 to -10°F   -29 to -23.5°C   4: -30 to -20°F   -34.5 to -29°C   3: -40 to -30°F   -40 to - 34.5°C   2: -50 to -30°F   -45.5 to -40°C   1: below -50°F   Below -45.5°C   w: warm     (Orchids)   i: intermediate (Orchids)   c: cool      (Orchids)

The coloured areas of this map correspond with the USDA plant hardiness zones.
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USDA average, annual, minimum temperature Zone

The number in this field refers to the average annual minimum temperature zones in the USDA plant hardiness zones table.

More information about plant hardiness can be found on our USA climate zone map page.
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