Where zone 4a shows up
| Location | Zone | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|---|
| Bethel, AK | 4a | May 21 | Sep 22 | 124 |
| Fargo, ND | 4a | May 10 | Sep 30 | 143 |
| Nome, AK | 4a | Jun 5 | Sep 3 | 90 |
| Williston, ND | 4a | May 21 | Sep 21 | 123 |
| Grand Forks, ND | 4a | May 11 | Sep 29 | 141 |
| Minot, ND | 4a | May 13 | Sep 28 | 138 |
| Aberdeen, SD | 4a | May 7 | Sep 30 | 146 |
States with zone 4a ground
Bottom line: zone 4a tells you what will survive your
winter. It does not tell you when to plant — two zone-4a gardens in this list are
29 days apart on last frost.
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