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PLANT FARM ZONE CHART
We use the USDA Zone system in our plant listings.
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Celsius
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Zone
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Fahrenheit
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Below -46
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1
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Below -50
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-40 to -46
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2
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-40 to -50
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-34 to -40
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3
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-30 to -40
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-29 to -34
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4
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-20 to -30
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-23 to -29
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5
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-10 to -20
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-18 to -23
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6
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0 to -10
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-12 to -18
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7
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0 to +10
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-7 to -12
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8
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10 to 20
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-7 to 0
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9
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20 to 32
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Hardiness Zones are based on the average
minimum winter temperature for each zone. Keep in mind that other factors
such as summer heat and humidity, winter wet, summer bone-dry also effect a
plant's ability to thrive. We have indicated this in the plant descriptions
wherever possible.
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