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Frost dates and growing zones in Minnesota
Towns covered so far in Minnesota fall in USDA zones 4b, 5a. Median dates mean frost comes later (spring) or earlier (fall) in half of years.
Towns
| Town | Zone | Median last frost | Median first frost |
|---|---|---|---|
| Minneapolis | 5a | Apr 23 | Oct 16 |
| Rochester | 4b | Apr 30 | Oct 6 |
| Duluth | 4b | May 6 | Oct 9 |