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POND Zones |

| Zone | Centigrade | Fahrenheit | 1 | below -46 | below -50 | 2 | -46 to -40 | -50 to -40 | 3 | -41 to -35 | -40 to -30 | 4 | -34 to -28 | -30 to -20 | 5 | -29 to -23 | -20 to -10 | 6 | -23 to -18 | -10 to 0 | 7 | -18 to -12 | 0 to 10 | 8 | -12 to -7 | 10 to 20 | 9 | -7 to -1 | 20 to 30 | 10 | -1 to 4 | 30 to 40 |
(C A U T I O N - These are only general indicators
put out by the United States Agricultural Department.)
FYI - My pond is located in Zone 6. While I have never seen the temperature go below -10f where I live (within 100 meters of the ocean) I do know it has gone below that in particularly cold winters inland and higher elevations in Zone 6.
For a bigger Plant Zone map Click Here