Where zone 5b shows up
| Location | Zone | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|---|
| Anchorage, AK | 5b | May 5 | Oct 1 | 149 |
| Billings, MT | 5b | May 4 | Oct 7 | 156 |
| Burns, OR | 5b | Jun 11 | Sep 6 | 87 |
| Concord, NH | 5b | May 8 | Oct 3 | 148 |
| Des Moines, IA | 5b | Apr 18 | Oct 20 | 185 |
| Elko, NV | 5b | May 29 | Sep 18 | 112 |
| Green Bay, WI | 5b | May 7 | Oct 9 | 155 |
| Missoula, MT | 5b | May 16 | Sep 26 | 133 |
| North Platte, NE | 5b | May 11 | Oct 1 | 143 |
| Omaha, NE | 5b | Apr 18 | Oct 21 | 186 |
| Pueblo, CO | 5b | Apr 30 | Oct 9 | 162 |
| Aurora, IL | 5b | Apr 23 | Oct 20 | 180 |
| Fort Collins, CO | 5b | May 17 | Sep 28 | 134 |
| Lakewood, CO | 5b | May 11 | Oct 3 | 145 |
| Rockford, IL | 5b | Apr 27 | Oct 13 | 169 |
| Joliet, IL | 5b | Apr 23 | Oct 20 | 180 |
| Naperville, IL | 5b | Apr 23 | Oct 20 | 180 |
| Westminster, CO | 5b | May 11 | Oct 3 | 145 |
| Arvada, CO | 5b | May 11 | Oct 3 | 145 |
| Peoria, IL | 5b | Apr 20 | Oct 19 | 182 |
| North Peoria, IL | 5b | Apr 20 | Oct 19 | 182 |
| Elgin, IL | 5b | Apr 27 | Oct 18 | 174 |
| Greeley, CO | 5b | May 7 | Oct 4 | 150 |
| Boulder, CO | 5b | May 20 | Sep 26 | 129 |
| Davenport, IA | 5b | Apr 23 | Oct 16 | 176 |
| Longmont, CO | 5b | May 20 | Sep 26 | 129 |
| Cheyenne, WY | 5b | May 17 | Sep 27 | 133 |
| Bellevue, NE | 5b | Apr 20 | Oct 17 | 180 |
| Lewiston, ME | 5b | May 4 | Oct 8 | 157 |
States with zone 5b ground
Bottom line: zone 5b tells you what will survive your
winter. It does not tell you when to plant — two zone-5b gardens in this list are
54 days apart on last frost.
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