Zones

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PLANT FARM ZONE CHART

We use the USDA Zone system in our plant listings.

Celsius

Zone

Fahrenheit

Below -46

1

Below -50

-40 to -46

2

-40 to -50

-34 to -40

3

-30 to -40

-29 to -34

4

-20 to -30

-23 to -29

5

-10 to -20

-18 to -23

6

0 to -10

-12 to -18

7

0 to +10

-7 to -12

8

10 to 20

-7 to 0

9

20 to 32

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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