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Frost dates and growing zones in Massachusetts
Towns covered so far in Massachusetts fall in USDA zones 6a, 6b, 7a. Median dates mean frost comes later (spring) or earlier (fall) in half of years.
Towns
| Town | Zone | Median last frost | Median first frost |
|---|---|---|---|
| Boston | 7a | Apr 4 | Nov 9 |
| Worcester | 6a | Apr 23 | Oct 21 |
| Springfield | 6a | Apr 21 | Oct 16 |
| Somerville | 6b | Apr 4 | Nov 9 |
| Medford | 6b | Apr 4 | Nov 9 |