Colorado planting calendars
Planting calendars, USDA hardiness zones, and average frost dates for 229 Colorado locations (Air Force Academy, CO, Akron, CO, Alamosa, CO, Allenspark, CO, Arboles, CO, Arvada, CO, Arvada, CO, Aspen, CO, Aspen Park, CO, Atwood, CO, Aurora, CO, Aurora, CO, and 217 more). Pick a location to see its zone, average last and first frost dates, growing-season length, and a printable per-crop planting calendar, all from public NOAA and USDA data.
Locations in Colorado — 150 of 229
| Location | USDA zone | Last frost | First frost | Season (days) |
|---|---|---|---|---|
| Air Force Academy | 5b −15 to −10 °F | May 17 | Oct 1 | 136 |
| Akron | 5b −15 to −10 °F | May 8 | Oct 6 | 149 |
| Allenspark | 5b −15 to −10 °F | May 30 | Sep 17 | 109 |
| Arboles | 6b −5 to 0 °F | May 23 | Sep 29 | 128 |
| Arvada | 6a −10 to −5 °F | May 5 | Oct 5 | 151 |
| Aspen | 5a −20 to −15 °F | Jun 2 | Sep 23 | 113 |
| Atwood | 5b −15 to −10 °F | May 10 | Oct 6 | 147 |
| Aurora | 6a −10 to −5 °F | May 5 | Oct 8 | 154 |
| Aurora | 6a −10 to −5 °F | May 5 | Oct 9 | 156 |
| Avon | 6a −10 to −5 °F | Jun 21 | Sep 7 | 77 |
| Bethune | 6a −10 to −5 °F | May 2 | Oct 10 | 160 |
| Black Forest | 5b −15 to −10 °F | May 11 | Oct 6 | 147 |
| Blue River | 5a −20 to −15 °F | Jun 16 | Sep 9 | 83 |
| Boulder | 6a −10 to −5 °F | May 6 | Oct 5 | 151 |
| Branson | 6a −10 to −5 °F | May 21 | Sep 29 | 128 |
| Briggsdale | 5a −20 to −15 °F | May 12 | Sep 28 | 135 |
| Brook Forest | 5b −15 to −10 °F | Jun 15 | Sep 9 | 84 |
| Brush | 5b −15 to −10 °F | May 6 | Oct 8 | 155 |
| Capulin | 5b −15 to −10 °F | May 28 | Sep 21 | 115 |
| Cathedral | 5b −15 to −10 °F | Jun 9 | Sep 16 | 96 |
| Cedaredge | 5b −15 to −10 °F | May 3 | Oct 9 | 156 |
| Cheyenne Wells | 6a −10 to −5 °F | May 1 | Oct 14 | 165 |
| City of Creede | 5a −20 to −15 °F | Jun 15 | Sep 11 | 85 |
| Coal Creek | 5b −15 to −10 °F | Jun 5 | Sep 16 | 103 |
| Coaldale | 5b −15 to −10 °F | May 29 | Sep 20 | 112 |
| Collbran | 5b −15 to −10 °F | May 17 | Sep 30 | 136 |
| Colona | 5b −15 to −10 °F | Jun 20 | Sep 10 | 81 |
| Colorado | 6a −10 to −5 °F | May 5 | Oct 10 | 156 |
| Colorado Springs | 5b −15 to −10 °F | Jun 3 | Sep 17 | 102 |
| Colorado Springs | 6a −10 to −5 °F | May 3 | Oct 8 | 158 |
| Colorado Springs | 6a −10 to −5 °F | May 9 | Oct 6 | 150 |
| Colorado Springs | 5b −15 to −10 °F | May 3 | Oct 8 | 158 |
| Columbine | 6a −10 to −5 °F | May 8 | Oct 3 | 147 |
| Cope | 5b −15 to −10 °F | May 15 | Oct 2 | 139 |
| Cope | 5b −15 to −10 °F | May 12 | Oct 4 | 143 |
| Copper Mountain | 5a −20 to −15 °F | Jun 21 | Sep 7 | 77 |
| Cortez | 7a 0 to 5 °F | May 9 | Oct 14 | 156 |
| Craig | 5b −15 to −10 °F | Jun 6 | Sep 12 | 96 |
| Crestone | 5a −20 to −15 °F | May 26 | Sep 26 | 120 |
| Del Norte | 5b −15 to −10 °F | Jun 11 | Sep 13 | 92 |
| Denver | 6a −10 to −5 °F | Apr 30 | Oct 12 | 165 |
| Denver | 5b −15 to −10 °F | Apr 30 | Oct 12 | 165 |
| Dotsero | 5b −15 to −10 °F | May 13 | Oct 3 | 142 |
| Dove Creek | 6b −5 to 0 °F | Jun 3 | Sep 25 | 113 |
| Downieville-Lawson-Dumont | 5b −15 to −10 °F | May 30 | Sep 19 | 112 |
| Durango | 6b −5 to 0 °F | Jun 1 | Sep 27 | 116 |
| Eaton | 5a −20 to −15 °F | May 2 | Oct 8 | 159 |
| Edwards | 5b −15 to −10 °F | Jun 21 | Sep 7 | 77 |
| Eldora | 5b −15 to −10 °F | Jun 21 | Sep 2 | 71 |
| Ellicott | 5b −15 to −10 °F | May 9 | Oct 4 | 146 |
| Estes Park | 5a −20 to −15 °F | May 30 | Sep 17 | 109 |
| Fairplay | 5b −15 to −10 °F | Jun 16 | Sep 9 | 83 |
| Flagler | 5b −15 to −10 °F | May 5 | Oct 8 | 155 |
| Fleming | 5b −15 to −10 °F | May 4 | Oct 11 | 157 |
| Fort Collins | 5b −15 to −10 °F | May 2 | Oct 7 | 157 |
| Fort Collins | 5b −15 to −10 °F | May 3 | Oct 6 | 154 |
| Fowler | 6a −10 to −5 °F | May 8 | Oct 4 | 148 |
| Fruita | 6b −5 to 0 °F | Apr 28 | Oct 16 | 171 |
| Fruitvale | 7a 0 to 5 °F | Apr 17 | Oct 26 | 190 |
| Garfield | 5b −15 to −10 °F | May 27 | Sep 23 | 116 |
| Glenwood Springs | 6a −10 to −5 °F | May 13 | Oct 3 | 142 |
| Granby | 5a −20 to −15 °F | Jun 13 | Sep 7 | 84 |
| Grand Junction | 7a 0 to 5 °F | Apr 28 | Oct 16 | 171 |
| Guffey | 5b −15 to −10 °F | Jun 2 | Sep 19 | 108 |
| Gunnison | 5b −15 to −10 °F | Jun 21 | Sep 5 | 74 |
| Hasty | 6a −10 to −5 °F | Apr 24 | Oct 15 | 172 |
| Haswell | 5b −15 to −10 °F | Apr 30 | Oct 13 | 165 |
| Hayden | 5a −20 to −15 °F | Jun 1 | Sep 20 | 109 |
| Highlands Ranch | 6a −10 to −5 °F | May 2 | Oct 11 | 160 |
| Holly | 6a −10 to −5 °F | May 1 | Oct 12 | 163 |
| Holyoke | 5b −15 to −10 °F | May 11 | Oct 3 | 144 |
| Hot Sulphur Springs | 5b −15 to −10 °F | Jun 12 | Sep 10 | 89 |
| Hotchkiss | 6b −5 to 0 °F | May 3 | Oct 12 | 159 |
| Idalia | 6a −10 to −5 °F | May 4 | Oct 9 | 155 |
| Iliff | 5b −15 to −10 °F | May 11 | Oct 4 | 145 |
| Johnstown | 5b −15 to −10 °F | May 10 | Oct 1 | 142 |
| Keenesburg | 5b −15 to −10 °F | May 5 | Oct 9 | 156 |
| Ken Caryl | 5b −15 to −10 °F | May 8 | Oct 3 | 147 |
| Kim | 6a −10 to −5 °F | May 5 | Oct 9 | 156 |
| Kit Carson | 5b −15 to −10 °F | May 10 | Oct 1 | 142 |
| Kremmling | 5a −20 to −15 °F | Jun 14 | Sep 5 | 80 |
| La Junta | 6a −10 to −5 °F | Apr 27 | Oct 14 | 168 |
| Lake | 5a −20 to −15 °F | Jun 8 | Sep 17 | 101 |
| Lakewood | 6a −10 to −5 °F | May 3 | Oct 7 | 155 |
| Laporte | 5b −15 to −10 °F | May 21 | Sep 29 | 128 |
| Las Animas | 6a −10 to −5 °F | Apr 29 | Oct 12 | 166 |
| Lewis | 6b −5 to 0 °F | May 2 | Oct 10 | 159 |
| Limon | 5b −15 to −10 °F | May 21 | Sep 26 | 127 |
| Loma | 6b −5 to 0 °F | May 25 | Sep 25 | 120 |
| Longmont | 5b −15 to −10 °F | May 7 | Oct 5 | 151 |
| Lyons | 6a −10 to −5 °F | May 7 | Oct 5 | 151 |
| Mancos | 6a −10 to −5 °F | Jun 4 | Sep 24 | 111 |
| Marvel | 6a −10 to −5 °F | Jun 1 | Sep 27 | 116 |
| Matheson | 5b −15 to −10 °F | May 9 | Oct 6 | 149 |
| Maybell | 6a −10 to −5 °F | Jun 16 | Sep 9 | 83 |
| McCoy | 5b −15 to −10 °F | Jun 14 | Sep 11 | 89 |
| Meeker | 5b −15 to −10 °F | May 30 | Sep 22 | 117 |
| Monte Vista | 5a −20 to −15 °F | Jun 11 | Sep 13 | 92 |
| Montrose | 6b −5 to 0 °F | Apr 28 | Oct 14 | 167 |
| Mount Crested Butte | 5a −20 to −15 °F | Jun 20 | Sep 8 | 80 |
| Naturita | 6b −5 to 0 °F | May 25 | Oct 1 | 128 |
| Norwood | 6a −10 to −5 °F | May 25 | Oct 1 | 128 |
| Nucla | 6a −10 to −5 °F | Apr 26 | Oct 18 | 174 |
| Nunn | 5a −20 to −15 °F | May 13 | Sep 27 | 136 |
| Olathe | 6b −5 to 0 °F | May 2 | Oct 8 | 157 |
| Orchard | 6b −5 to 0 °F | May 3 | Oct 9 | 156 |
| Orchard Mesa | 7a 0 to 5 °F | Apr 23 | Oct 20 | 179 |
| Ouray | 5b −15 to −10 °F | May 17 | Oct 1 | 137 |
| Pagosa Springs | 5b −15 to −10 °F | Jun 9 | Sep 22 | 103 |
| Parachute | 6a −10 to −5 °F | May 25 | Sep 25 | 120 |
| Parker | 5b −15 to −10 °F | May 9 | Oct 3 | 145 |
| Penrose | 6a −10 to −5 °F | May 4 | Oct 7 | 153 |
| Phippsburg | 5a −20 to −15 °F | Jun 14 | Sep 11 | 89 |
| Placerville | 5b −15 to −10 °F | May 26 | Sep 29 | 125 |
| Ponderosa Park | 5b −15 to −10 °F | May 16 | Oct 2 | 137 |
| Pueblo | 6a −10 to −5 °F | Apr 30 | Oct 9 | 161 |
| Rangely | 6a −10 to −5 °F | May 15 | Oct 1 | 136 |
| Raymer (New Raymer) | 5a −20 to −15 °F | May 18 | Sep 29 | 133 |
| Red Feather Lakes | 5b −15 to −10 °F | Jun 5 | Sep 16 | 101 |
| Red Feather Lakes | 5a −20 to −15 °F | Jun 5 | Sep 16 | 101 |
| Redlands | 7a 0 to 5 °F | Apr 26 | Oct 16 | 172 |
| Redlands | 6b −5 to 0 °F | May 21 | Sep 26 | 126 |
| Rico | 6a −10 to −5 °F | May 26 | Sep 29 | 125 |
| Ridgway | 6a −10 to −5 °F | Jun 11 | Sep 13 | 92 |
| Roxborough Park | 5b −15 to −10 °F | May 16 | Oct 1 | 136 |
| Saguache | 5b −15 to −10 °F | May 16 | Sep 28 | 135 |
| San Luis | 5b −15 to −10 °F | May 31 | Sep 23 | 115 |
| Sedgwick | 5b −15 to −10 °F | May 6 | Oct 7 | 152 |
| Sheridan Lake | 6a −10 to −5 °F | Apr 27 | Oct 15 | 170 |
| Silver Cliff | 5b −15 to −10 °F | Jun 11 | Sep 9 | 89 |
| Snowmass | 6a −10 to −5 °F | May 31 | Sep 23 | 114 |
| Somerset | 6a −10 to −5 °F | May 3 | Oct 12 | 159 |
| Southern Ute | 6a −10 to −5 °F | May 23 | Sep 29 | 128 |
| Steamboat Springs | 5a −20 to −15 °F | Jun 9 | Sep 12 | 93 |
| Steamboat Springs | 5b −15 to −10 °F | Jun 9 | Sep 12 | 93 |
| Stonewall Gap | 6a −10 to −5 °F | May 11 | Oct 4 | 145 |
| Strasburg | 5b −15 to −10 °F | May 13 | Oct 2 | 142 |
| Sugar | 5b −15 to −10 °F | May 2 | Oct 8 | 159 |
| Tabernash | 5b −15 to −10 °F | Jun 13 | Sep 7 | 84 |
| Towaoc | 7a 0 to 5 °F | May 27 | Sep 28 | 125 |
| Trinidad | 6a −10 to −5 °F | Apr 30 | Oct 15 | 167 |
| Twin Lakes | 5a −20 to −15 °F | Jun 16 | Sep 10 | 85 |
| Vernon | 5b −15 to −10 °F | May 4 | Oct 9 | 155 |
| Walden | 4b −25 to −20 °F | Jun 13 | Sep 7 | 84 |
| Walden | 4b −25 to −20 °F | Jun 2 | Sep 19 | 106 |
| Walsh | 6b −5 to 0 °F | Apr 30 | Oct 14 | 166 |
| Westcreek | 5b −15 to −10 °F | May 17 | Oct 1 | 135 |
| Wiggins | 5a −20 to −15 °F | May 6 | Oct 6 | 153 |
| Winter Park | 5a −20 to −15 °F | May 30 | Sep 19 | 112 |
| Wray | 5b −15 to −10 °F | May 7 | Oct 6 | 151 |
Data: NOAA NCEI U.S. Climate Normals 1991–2020 (public domain) and USDA Plant Hardiness Zone Map 2023. Planting windows synthesized from U.S. Cooperative Extension guides.
More ways to explore
Browse by USDA hardiness zone, see when to plant common crops, or read the methodology behind every figure. This site lists 229 Colorado locations, mapping every ZIP in the state to its nearest weather station with a full 30-year record.