Par État
Alabama 7
Alaska 9
Arizona 17
Arkansas 3
California 110
Colorado 15
Connecticut 9
Delaware 2
District of Columbia 3
Florida 31
Georgia 9
Hawaii 2
Idaho 5
Illinois 14
Indiana 6
Iowa 3
Kansas 8
Kentucky 4
Louisiana 6
Maine 4
Maryland 3
Massachusetts 13
Michigan 14
Minnesota 6
Mississippi 3
Missouri 8
Montana 5
Nebraska 5
Nevada 10
New Hampshire 3
New Jersey 9
New Mexico 6
New York 26
North Carolina 14
North Dakota 5
Ohio 6
Oklahoma 7
Oregon 9
Pennsylvania 5
Rhode Island 2
South Carolina 3
South Dakota 4
Tennessee 11
Texas 46
Utah 8
Vermont 3
Virginia 13
Washington 16
West Virginia 4
Wisconsin 4
Wyoming 3
Par zone de rusticité USDA
Une zone vous dit ce qui survit à votre hiver, pas quand semer. Utile pour choisir les vivaces et les fruitiers ; beaucoup moins pour les tomates.
Zone 2a 2
Zone 4a 7
Zone 4b 6
Zone 5a 18
Zone 5b 29
Zone 6a 46
Zone 6b 43
Zone 7a 48
Zone 7b 55
Zone 8a 43
Zone 8b 47
Zone 9a 35
Zone 9b 67
Zone 10a 49
Zone 10b 39
Zone 11a 5
Zone 12b 2
Tous les lieux
| Lieu | Zone | Dernier gel de printemps | Premier gel d’automne | Jours sans gel |
|---|---|---|---|---|
| Birmingham, AL | 8a | Mar 21 | Nov 11 | 235 |
| Greensboro, AL | 8b | Mar 17 | Nov 11 | 239 |
| Hoover, AL | 8b | Mar 20 | Nov 10 | 235 |
| Huntsville, AL | 8a | Mar 29 | Nov 4 | 220 |
| Mobile, AL | 9a | Feb 21 | Dec 6 | 288 |
| Montgomery, AL | 8b | Mar 13 | Nov 15 | 247 |
| Tuscaloosa, AL | 8a | Mar 20 | Nov 10 | 235 |
| Anchorage, AK | 5b | May 5 | Oct 1 | 149 |
| Badger, AK | 2a | May 13 | Sep 9 | 119 |
| Bethel, AK | 4a | May 21 | Sep 22 | 124 |
| Eagle River, AK | 5a | May 11 | Sep 24 | 136 |
| Fairbanks, AK | 2a | May 13 | Sep 13 | 123 |
| Juneau, AK | 7a | May 4 | Oct 3 | 152 |
| Ketchikan, AK | 8a | Apr 22 | Oct 23 | 184 |
| Kodiak, AK | 7b | May 5 | Oct 3 | 151 |
| Nome, AK | 4a | Jun 5 | Sep 3 | 90 |
| Ahwatukee Foothills, AZ | 9b | — | — | toute l’année |
| Alhambra, AZ | 9b | — | — | toute l’année |
| Chandler, AZ | 9b | — | — | toute l’année |
| Deer Valley, AZ | 9b | — | — | toute l’année |
| Flagstaff, AZ | 6a | Jun 4 | Sep 28 | 116 |
| Gilbert, AZ | 9b | — | — | toute l’année |
| Glendale, AZ | 9b | — | — | toute l’année |
| Maryvale, AZ | 9b | — | — | toute l’année |
| Mesa, AZ | 9b | — | — | toute l’année |
| Peoria, AZ | 9b | — | — | toute l’année |
| Phoenix, AZ | 10a | Jan 8 | Dec 25 | 351 |
| Scottsdale, AZ | 9b | — | — | toute l’année |
| Surprise, AZ | 9b | — | — | toute l’année |
| Tempe, AZ | 9b | — | — | toute l’année |
| Tempe Junction, AZ | 9b | — | — | toute l’année |
| Tucson, AZ | 9b | Feb 5 | Dec 9 | 307 |
| Yuma, AZ | 10a | — | — | toute l’année |
| Fayetteville, AR | 7a | Apr 8 | Oct 29 | 204 |
| Fort Smith, AR | 8a | Mar 31 | Nov 3 | 217 |
| Little Rock, AR | 8a | Mar 21 | Nov 10 | 234 |
| Alhambra, CA | 10a | — | — | toute l’année |
| Anaheim, CA | 10b | — | — | toute l’année |
| Antioch, CA | 9b | Feb 2 | Dec 6 | 307 |
| Arden-Arcade, CA | 9b | Feb 22 | Dec 1 | 282 |
| Bakersfield, CA | 9b | Jan 31 | Dec 8 | 311 |
| Berkeley, CA | 10a | — | — | toute l’année |
| Boyle Heights, CA | 10a | — | — | toute l’année |
| Buena Park, CA | 10b | — | — | toute l’année |
| Burbank, CA | 10a | — | — | toute l’année |
| Carlsbad, CA | 10a | — | — | toute l’année |
| Carson, CA | 10b | — | — | toute l’année |
| Chico, CA | 9b | Mar 1 | Nov 28 | 272 |
| Chinatown, CA | 10a | — | — | toute l’année |
| Chino, CA | 9a | Mar 4 | Nov 28 | 269 |
| Chula Vista, CA | 10b | — | — | toute l’année |
| Citrus Heights, CA | 9b | Feb 22 | Dec 1 | 282 |
| Clovis, CA | 9b | Feb 13 | Dec 4 | 294 |
| Compton, CA | 10b | — | — | toute l’année |
| Concord, CA | 10a | — | — | toute l’année |
| Corona, CA | 10b | — | — | toute l’année |
| Costa Mesa, CA | 10b | — | — | toute l’année |
| Daly City, CA | 10a | — | — | toute l’année |
| Downey, CA | 10b | — | — | toute l’année |
| East Los Angeles, CA | 10a | — | — | toute l’année |
| El Cajon, CA | 9b | — | — | toute l’année |
| El Monte, CA | 10a | — | — | toute l’année |
| Elk Grove, CA | 9b | Feb 7 | Dec 6 | 302 |
| Escondido, CA | 10a | — | — | toute l’année |
| Eureka, CA | 9b | Mar 8 | Nov 30 | 267 |
| Fairfield, CA | 9b | — | — | toute l’année |
| Fontana, CA | 9a | Mar 8 | Nov 25 | 262 |
| Fremont, CA | 9b | — | — | toute l’année |
| Fresno, CA | 9b | Jan 14 | Dec 14 | 334 |
| Fullerton, CA | 10b | — | — | toute l’année |
| Garden Grove, CA | 10b | — | — | toute l’année |
| Glendale, CA | 10a | — | — | toute l’année |
| Hawthorne, CA | 10b | — | — | toute l’année |
| Hayward, CA | 10a | — | — | toute l’année |
| Hemet, CA | 9b | — | — | toute l’année |
| Hesperia, CA | 9a | Mar 8 | Nov 25 | 262 |
| Hollywood, CA | 10a | — | — | toute l’année |
| Huntington Beach, CA | 10b | — | — | toute l’année |
| Indio, CA | 9b | — | — | toute l’année |
| Inglewood, CA | 10b | — | — | toute l’année |
| Irvine, CA | 10b | — | — | toute l’année |
| Koreatown, CA | 10a | — | — | toute l’année |
| Lancaster, CA | 8b | Mar 26 | Nov 17 | 236 |
| Livermore, CA | 9b | — | — | toute l’année |
| Long Beach, CA | 10b | — | — | toute l’année |
| Los Angeles, CA | 10a | — | — | toute l’année |
| Menifee, CA | 9b | — | — | toute l’année |
| Mid-City, CA | 10a | — | — | toute l’année |
| Mission Viejo, CA | 10b | — | — | toute l’année |
| Modesto, CA | 9b | Feb 15 | Dec 3 | 291 |
| Moreno Valley, CA | 9b | — | — | toute l’année |
| Murrieta, CA | 9b | — | — | toute l’année |
| Newport Beach, CA | 10b | — | — | toute l’année |
| Norwalk, CA | 10b | — | — | toute l’année |
| Oakland, CA | 10a | — | — | toute l’année |
| Oceanside, CA | 9b | Feb 16 | Dec 8 | 295 |
| Ontario, CA | 9a | Mar 4 | Nov 28 | 269 |
| Orange, CA | 10b | — | — | toute l’année |
| Oxnard, CA | 10a | — | — | toute l’année |
| Palmdale, CA | 8b | Mar 26 | Nov 17 | 236 |
| Pasadena, CA | 10a | — | — | toute l’année |
| Pomona, CA | 9a | Mar 4 | Nov 28 | 269 |
| Rancho Cucamonga, CA | 9a | Mar 4 | Nov 28 | 269 |
| Redding, CA | 9a | Mar 3 | Nov 21 | 263 |
| Redwood City, CA | 9b | — | — | toute l’année |
| Rialto, CA | 9a | Mar 8 | Nov 25 | 262 |
| Richmond, CA | 10a | — | — | toute l’année |
| Riverside, CA | 9b | — | — | toute l’année |
| Roseville, CA | 9b | Feb 22 | Dec 1 | 282 |
| Sacramento, CA | 9b | Feb 2 | Dec 2 | 303 |
| Salinas, CA | 9b | Jan 30 | Dec 12 | 316 |
| San Bernardino, CA | 9a | Mar 8 | Nov 25 | 262 |
| San Diego, CA | 10b | Jan 6 | Dec 31 | 359 |
| San Francisco, CA | 10a | — | — | toute l’année |
| San Jose, CA | 9b | Feb 9 | Dec 11 | 305 |
| San Leandro, CA | 10a | — | — | toute l’année |
| San Marcos, CA | 10a | — | — | toute l’année |
| San Mateo, CA | 10a | — | — | toute l’année |
| San Pedro, CA | 10b | — | — | toute l’année |
| Santa Ana, CA | 10b | — | — | toute l’année |
| Santa Barbara, CA | 10b | — | — | toute l’année |
| Santa Clara, CA | 9b | Feb 9 | Dec 11 | 305 |
| Santa Clarita, CA | 10a | — | — | toute l’année |
| Santa Maria, CA | 9b | Feb 4 | Dec 13 | 312 |
| Santa Monica, CA | 10a | — | — | toute l’année |
| Santa Rosa, CA | 9b | — | — | toute l’année |
| Simi Valley, CA | 10a | — | — | toute l’année |
| South Gate, CA | 10b | — | — | toute l’année |
| Stockton, CA | 9b | Feb 11 | Dec 3 | 295 |
| Sunnyvale, CA | 9b | — | — | toute l’année |
| Temecula, CA | 10a | — | — | toute l’année |
| Thousand Oaks, CA | 10a | — | — | toute l’année |
| Torrance, CA | 10b | — | — | toute l’année |
| Tracy, CA | 9b | Feb 11 | Dec 3 | 295 |
| Universal City, CA | 10a | — | — | toute l’année |
| Vacaville, CA | 9b | Feb 2 | Dec 6 | 307 |
| Valencia, CA | 10a | — | — | toute l’année |
| Vallejo, CA | 9b | — | — | toute l’année |
| Van Nuys, CA | 10a | — | — | toute l’année |
| Ventura, CA | 10a | — | — | toute l’année |
| Victorville, CA | 8b | Mar 16 | Nov 17 | 246 |
| Visalia, CA | 9b | Feb 14 | Dec 3 | 292 |
| Vista, CA | 10a | — | — | toute l’année |
| West Covina, CA | 9a | Mar 4 | Nov 28 | 269 |
| Westminster, CA | 10b | — | — | toute l’année |
| Whittier, CA | 10b | — | — | toute l’année |
| Arvada, CO | 5b | May 11 | Oct 3 | 145 |
| Aurora, CO | 6a | May 5 | Oct 8 | 156 |
| Boulder, CO | 5b | May 20 | Sep 26 | 129 |
| Centennial, CO | 6a | May 5 | Oct 8 | 156 |
| Colorado Springs, CO | 6a | May 13 | Oct 3 | 143 |
| Denver, CO | 6a | May 5 | Oct 9 | 157 |
| Fort Collins, CO | 5b | May 17 | Sep 28 | 134 |
| Grand Junction, CO | 7a | Apr 23 | Oct 20 | 180 |
| Greeley, CO | 5b | May 7 | Oct 4 | 150 |
| Highlands Ranch, CO | 6a | May 5 | Oct 8 | 156 |
| Lakewood, CO | 5b | May 11 | Oct 3 | 145 |
| Longmont, CO | 5b | May 20 | Sep 26 | 129 |
| Pueblo, CO | 5b | Apr 30 | Oct 9 | 162 |
| Thornton, CO | 6a | May 5 | Oct 8 | 156 |
| Westminster, CO | 5b | May 11 | Oct 3 | 145 |
| Bridgeport, CT | 7a | Apr 20 | Oct 24 | 187 |
| Danbury, CT | 7a | Apr 20 | Oct 24 | 187 |
| East Norwalk, CT | 7a | Apr 20 | Oct 24 | 187 |
| Hartford, CT | 6b | Apr 21 | Oct 16 | 178 |
| New Haven, CT | 7a | Apr 15 | Oct 31 | 199 |
| North Stamford, CT | 7a | Apr 21 | Oct 23 | 185 |
| Norwalk, CT | 7a | Apr 20 | Oct 24 | 187 |
| Stamford, CT | 7a | Apr 21 | Oct 23 | 185 |
| Waterbury, CT | 6a | May 2 | Oct 12 | 163 |
| Dover, DE | 7b | Apr 9 | Nov 1 | 206 |
| Wilmington, DE | 7a | Apr 13 | Oct 30 | 200 |
| Downtown DC, DC | 7b | Apr 7 | Nov 2 | 209 |
| Washington, DC | 7b | Apr 7 | Nov 2 | 209 |
| Washington, D.C., DC | 8a | Mar 24 | Nov 18 | 239 |
| Boca Raton, FL | 10b | — | — | toute l’année |
| Brandon, FL | 9b | — | — | toute l’année |
| Cape Coral, FL | 10a | — | — | toute l’année |
| Clearwater, FL | 10b | — | — | toute l’année |
| Coral Springs, FL | 10b | — | — | toute l’année |
| Davie, FL | 10b | — | — | toute l’année |
| Deltona, FL | 9b | — | — | toute l’année |
| Fort Lauderdale, FL | 10b | — | — | toute l’année |
| Gainesville, FL | 9a | Feb 28 | Dec 6 | 281 |
| Hialeah, FL | 11a | — | — | toute l’année |
| Hollywood, FL | 10b | — | — | toute l’année |
| Jacksonville, FL | 9b | — | — | toute l’année |
| Lakeland, FL | 10a | — | — | toute l’année |
| Lehigh Acres, FL | 10a | — | — | toute l’année |
| Melbourne, FL | 10a | — | — | toute l’année |
| Miami, FL | 11a | — | — | toute l’année |
| Miami Beach, FL | 11a | — | — | toute l’année |
| Miami Gardens, FL | 11a | — | — | toute l’année |
| Miramar, FL | 11a | — | — | toute l’année |
| Orlando, FL | 9b | — | — | toute l’année |
| Palm Bay, FL | 10a | — | — | toute l’année |
| Pembroke Pines, FL | 10b | — | — | toute l’année |
| Plantation, FL | 10b | — | — | toute l’année |
| Pompano Beach, FL | 10b | — | — | toute l’année |
| Port Saint Lucie, FL | 10a | — | — | toute l’année |
| Spring Hill, FL | 10a | — | — | toute l’année |
| St. Petersburg, FL | 10b | — | — | toute l’année |
| Sunrise, FL | 10b | — | — | toute l’année |
| Tallahassee, FL | 9a | Mar 14 | Nov 23 | 254 |
| Tampa, FL | 9b | — | — | toute l’année |
| West Palm Beach, FL | 10b | — | — | toute l’année |
| Athens, GA | 8a | Mar 29 | Nov 7 | 223 |
| Atlanta, GA | 8b | Mar 15 | Nov 20 | 250 |
| Columbus, GA | 8b | Mar 20 | Nov 13 | 238 |
| Johns Creek, GA | 8a | Apr 1 | Nov 5 | 218 |
| Macon, GA | 8b | Mar 20 | Nov 12 | 237 |
| Roswell, GA | 8a | Apr 1 | Nov 5 | 218 |
| Sandy Springs, GA | 8a | Mar 25 | Nov 10 | 230 |
| Savannah, GA | 9a | Mar 2 | Nov 30 | 273 |
| South Fulton, GA | 8a | Mar 29 | Nov 6 | 222 |
| East Honolulu, HI | 12b | — | — | toute l’année |
| Honolulu, HI | 12b | — | — | toute l’année |
| Boise, ID | 7b | Apr 24 | Oct 21 | 180 |
| Lewiston, ID | 7b | Apr 6 | Oct 26 | 203 |
| Meridian, ID | 7a | May 7 | Oct 10 | 156 |
| Nampa, ID | 7a | Apr 25 | Oct 14 | 172 |
| Pocatello, ID | 6a | May 23 | Sep 18 | 118 |
| Aurora, IL | 5b | Apr 23 | Oct 20 | 180 |
| Champaign, IL | 6a | Apr 20 | Oct 18 | 181 |
| Chicago, IL | 6a | Apr 16 | Oct 28 | 195 |
| Cicero, IL | 6a | Apr 17 | Oct 26 | 192 |
| Elgin, IL | 5b | Apr 27 | Oct 18 | 174 |
| Joliet, IL | 5b | Apr 23 | Oct 20 | 180 |
| Naperville, IL | 5b | Apr 23 | Oct 20 | 180 |
| Near North Side, IL | 6a | Apr 17 | Oct 26 | 192 |
| North Peoria, IL | 5b | Apr 20 | Oct 19 | 182 |
| Peoria, IL | 5b | Apr 20 | Oct 19 | 182 |
| Rockford, IL | 5b | Apr 27 | Oct 13 | 169 |
| Springfield, IL | 6a | Apr 14 | Oct 21 | 190 |
| Waukegan, IL | 6a | Apr 24 | Oct 23 | 182 |
| West Town, IL | 6a | Apr 17 | Oct 26 | 192 |
| Bloomington, IN | 6a | Apr 17 | Oct 22 | 188 |
| Carmel, IN | 6a | Apr 17 | Oct 24 | 190 |
| Evansville, IN | 7a | Apr 4 | Oct 29 | 208 |
| Fort Wayne, IN | 6a | Apr 28 | Oct 17 | 172 |
| Indianapolis, IN | 6b | Apr 12 | Oct 29 | 200 |
| South Bend, IN | 6a | Apr 28 | Oct 20 | 175 |
| Cedar Rapids, IA | 5a | May 1 | Oct 8 | 160 |
| Davenport, IA | 5b | Apr 23 | Oct 16 | 176 |
| Des Moines, IA | 5b | Apr 18 | Oct 20 | 185 |
| Dodge City, KS | 6b | Apr 21 | Oct 20 | 182 |
| Goodland, KS | 6a | May 2 | Oct 11 | 162 |
| Kansas City, KS | 6b | Apr 14 | Oct 24 | 193 |
| Lawrence, KS | 6b | Apr 14 | Oct 24 | 193 |
| Olathe, KS | 6b | Apr 11 | Oct 27 | 199 |
| Overland Park, KS | 6b | Apr 11 | Oct 27 | 199 |
| Topeka, KS | 6b | Apr 16 | Oct 21 | 188 |
| Wichita, KS | 7a | Apr 12 | Oct 26 | 197 |
| Lexington, KY | 7a | Apr 13 | Oct 28 | 198 |
| Lexington-Fayette, KY | 6b | Apr 16 | Oct 24 | 191 |
| Louisville, KY | 7a | Apr 9 | Oct 30 | 204 |
| Meads, KY | 6b | Apr 21 | Oct 22 | 184 |
| Baton Rouge, LA | 9a | Feb 25 | Nov 26 | 274 |
| Lafayette, LA | 9a | Feb 21 | Dec 1 | 283 |
| Metairie, LA | 9b | — | — | toute l’année |
| Metairie Terrace, LA | 9b | — | — | toute l’année |
| New Orleans, LA | 9b | — | — | toute l’année |
| Shreveport, LA | 8b | Feb 28 | Nov 24 | 269 |
| Bangor, ME | 5a | May 7 | Oct 4 | 150 |
| Caribou, ME | 4b | May 7 | Oct 1 | 147 |
| Lewiston, ME | 5b | May 4 | Oct 8 | 157 |
| Portland, ME | 6a | Apr 26 | Oct 15 | 172 |
| Baltimore, MD | 7b | Apr 9 | Nov 3 | 208 |
| Columbia, MD | 7b | Apr 9 | Nov 3 | 208 |
| Germantown, MD | 7b | Apr 11 | Oct 30 | 202 |
| Boston, MA | 7a | Apr 4 | Nov 9 | 219 |
| Brockton, MA | 6b | Apr 24 | Oct 17 | 176 |
| Cambridge, MA | 6b | Apr 24 | Oct 17 | 176 |
| Dorchester, MA | 6b | Apr 24 | Oct 17 | 176 |
| Fall River, MA | 7a | Apr 18 | Oct 24 | 189 |
| Lowell, MA | 6a | Apr 28 | Oct 13 | 168 |
| Lynn, MA | 7a | Apr 19 | Oct 24 | 188 |
| New Bedford, MA | 7a | Apr 21 | Oct 23 | 185 |
| Newton, MA | 6b | Apr 24 | Oct 17 | 176 |
| Quincy, MA | 6b | Apr 24 | Oct 17 | 176 |
| South Boston, MA | 6b | Apr 24 | Oct 17 | 176 |
| Springfield, MA | 6a | May 5 | Oct 9 | 157 |
| Worcester, MA | 6b | Apr 29 | Oct 12 | 166 |
| Ann Arbor, MI | 6a | May 2 | Oct 12 | 163 |
| Canton, MI | 6b | Apr 26 | Oct 21 | 178 |
| Clinton Township, MI | 6a | May 1 | Oct 20 | 172 |
| Dearborn, MI | 6b | Apr 26 | Oct 21 | 178 |
| Detroit, MI | 6b | Apr 26 | Oct 21 | 178 |
| Detroit City, MI | 6b | Apr 21 | Oct 31 | 193 |
| Flint, MI | 6a | May 4 | Oct 12 | 161 |
| Grand Rapids, MI | 6a | May 4 | Oct 14 | 163 |
| Lansing, MI | 6a | May 1 | Oct 15 | 167 |
| Livonia, MI | 6b | Apr 26 | Oct 21 | 178 |
| Marquette, MI | 6a | May 8 | Oct 21 | 166 |
| Sterling Heights, MI | 6a | May 2 | Oct 16 | 167 |
| Troy, MI | 6a | May 2 | Oct 16 | 167 |
| Warren, MI | 6b | Apr 26 | Oct 21 | 178 |
| Bloomington, MN | 5a | Apr 27 | Oct 12 | 168 |
| Duluth, MN | 5a | May 14 | Oct 12 | 151 |
| Minneapolis, MN | 5a | Apr 27 | Oct 12 | 168 |
| Minneapolis-St. Paul, MN | 5a | Apr 23 | Oct 18 | 178 |
| Rochester, MN | 4b | May 2 | Oct 7 | 158 |
| Saint Paul, MN | 5a | Apr 27 | Oct 12 | 168 |
| Gulfport, MS | 9a | Feb 18 | Dec 6 | 291 |
| Jackson, MS | 8b | Mar 14 | Nov 14 | 245 |
| West Gulfport, MS | 9a | Feb 18 | Dec 6 | 291 |
| Columbia, MO | 6b | Apr 9 | Oct 27 | 201 |
| East Independence, MO | 6a | Apr 15 | Oct 22 | 190 |
| Independence, MO | 6a | Apr 15 | Oct 22 | 190 |
| Kansas City, MO | 6b | Apr 13 | Oct 24 | 194 |
| Lee's Summit, MO | 6b | Apr 11 | Oct 26 | 198 |
| O'Fallon, MO | 6b | Apr 10 | Oct 26 | 199 |
| Springfield, MO | 6b | Apr 13 | Oct 23 | 193 |
| St. Louis, MO | 7a | Apr 5 | Oct 30 | 208 |
| Billings, MT | 5b | May 4 | Oct 7 | 156 |
| Bozeman, MT | 5a | May 23 | Sep 23 | 123 |
| Butte, MT | 4b | Jun 5 | Sep 11 | 98 |
| Great Falls, MT | 4b | May 17 | Sep 24 | 130 |
| Missoula, MT | 5b | May 16 | Sep 26 | 133 |
| Bellevue, NE | 5b | Apr 20 | Oct 17 | 180 |
| Lincoln, NE | 6a | Apr 23 | Oct 14 | 174 |
| North Platte, NE | 5b | May 11 | Oct 1 | 143 |
| Omaha, NE | 5b | Apr 18 | Oct 21 | 186 |
| Scottsbluff, NE | 5a | May 5 | Oct 4 | 152 |
| Elko, NV | 5b | May 29 | Sep 18 | 112 |
| Enterprise, NV | 9a | Feb 22 | Nov 25 | 276 |
| Henderson, NV | 9b | Feb 1 | Dec 9 | 311 |
| Las Vegas, NV | 9b | Jan 24 | Dec 10 | 320 |
| North Las Vegas, NV | 9a | Feb 22 | Nov 25 | 276 |
| Paradise, NV | 9a | Feb 22 | Nov 25 | 276 |
| Reno, NV | 7b | Apr 20 | Oct 23 | 186 |
| Sparks, NV | 7a | May 5 | Oct 15 | 163 |
| Spring Valley, NV | 9a | Feb 22 | Nov 25 | 276 |
| Sunrise Manor, NV | 9a | Feb 22 | Nov 25 | 276 |
| Concord, NH | 5b | May 8 | Oct 3 | 148 |
| Manchester, NH | 6a | Apr 28 | Oct 13 | 168 |
| Nashua, NH | 6a | Apr 28 | Oct 13 | 168 |
| Atlantic City, NJ | 7a | Apr 18 | Oct 29 | 194 |
| Clifton, NJ | 7a | Apr 11 | Nov 1 | 204 |
| Edison, NJ | 7a | Apr 11 | Nov 1 | 204 |
| Elizabeth, NJ | 7a | Apr 11 | Nov 1 | 204 |
| Jersey City, NJ | 7a | Apr 11 | Nov 1 | 204 |
| Newark, NJ | 7a | Apr 11 | Nov 1 | 204 |
| Paterson, NJ | 7a | Apr 11 | Nov 1 | 204 |
| Toms River, NJ | 7b | Apr 15 | Oct 30 | 198 |
| Trenton, NJ | 7a | Apr 16 | Oct 27 | 194 |
| Albuquerque, NM | 8a | Apr 6 | Nov 3 | 211 |
| Enchanted Hills, NM | 7b | Apr 20 | Oct 22 | 185 |
| Las Cruces, NM | 8b | Mar 20 | Nov 12 | 237 |
| Rio Rancho, NM | 7b | Apr 20 | Oct 22 | 185 |
| Roswell, NM | 7b | Apr 13 | Oct 30 | 200 |
| Santa Fe, NM | 7a | May 4 | Oct 15 | 164 |
| Albany, NY | 6a | Apr 27 | Oct 15 | 171 |
| Amherst, NY | 6a | May 3 | Oct 17 | 167 |
| Borough Park, NY | 7b | Apr 2 | Nov 13 | 225 |
| Buffalo, NY | 6a | May 3 | Oct 17 | 167 |
| Bushwick, NY | 7b | Apr 2 | Nov 13 | 225 |
| Canarsie, NY | 7b | Apr 2 | Nov 13 | 225 |
| Chinatown, NY | 7b | Apr 2 | Nov 13 | 225 |
| Corona, NY | 7b | Apr 2 | Nov 13 | 225 |
| East Flatbush, NY | 7b | Apr 2 | Nov 13 | 225 |
| East Harlem, NY | 7b | Apr 2 | Nov 13 | 225 |
| East New York, NY | 7b | Apr 2 | Nov 13 | 225 |
| Elmhurst, NY | 7b | Apr 2 | Nov 13 | 225 |
| Flatbush, NY | 7b | Apr 2 | Nov 13 | 225 |
| Fordham, NY | 7b | Apr 2 | Nov 13 | 225 |
| Gravesend, NY | 7b | Apr 2 | Nov 13 | 225 |
| Greenburgh, NY | 7a | Apr 21 | Oct 23 | 185 |
| Jamaica, NY | 7b | Apr 2 | Nov 13 | 225 |
| New York City, NY | 7a | Apr 11 | Nov 1 | 204 |
| Richmond Hill, NY | 7b | Apr 2 | Nov 13 | 225 |
| Rochester, NY | 6b | Apr 27 | Oct 22 | 178 |
| Sheepshead Bay, NY | 7b | Apr 2 | Nov 13 | 225 |
| Sunset Park, NY | 7a | Apr 11 | Nov 1 | 204 |
| Syracuse, NY | 6a | Apr 29 | Oct 19 | 173 |
| Upper West Side, NY | 7b | Apr 2 | Nov 13 | 225 |
| West Albany, NY | 6a | Apr 30 | Oct 13 | 166 |
| Yonkers, NY | 7b | Apr 2 | Nov 13 | 225 |
| Asheville, NC | 7b | Apr 9 | Oct 28 | 202 |
| Cary, NC | 8a | Apr 1 | Nov 5 | 218 |
| Charlotte, NC | 8a | Mar 30 | Nov 4 | 219 |
| Concord, NC | 8a | Mar 30 | Nov 4 | 219 |
| Durham, NC | 8a | Apr 1 | Nov 5 | 218 |
| Fayetteville, NC | 8a | Mar 29 | Nov 7 | 223 |
| Greensboro, NC | 8a | Apr 2 | Nov 4 | 216 |
| Greenville, NC | 8a | Mar 26 | Nov 10 | 229 |
| High Point, NC | 8a | Apr 5 | Oct 31 | 209 |
| Raleigh, NC | 8a | Apr 1 | Nov 5 | 218 |
| Roanoke Rapids, NC | 8a | Mar 27 | Nov 12 | 230 |
| West Raleigh, NC | 8a | Apr 1 | Nov 5 | 218 |
| Wilmington, NC | 8b | Mar 24 | Nov 14 | 235 |
| Winston-Salem, NC | 7b | Apr 9 | Oct 30 | 204 |
| Bismarck, ND | 4b | May 10 | Sep 30 | 143 |
| Fargo, ND | 4a | May 10 | Sep 30 | 143 |
| Grand Forks, ND | 4a | May 11 | Sep 29 | 141 |
| Minot, ND | 4a | May 13 | Sep 28 | 138 |
| Williston, ND | 4a | May 21 | Sep 21 | 123 |
| Akron, OH | 6b | Apr 24 | Oct 26 | 185 |
| Cincinnati, OH | 6b | Apr 20 | Oct 23 | 186 |
| Cleveland, OH | 6b | Apr 24 | Oct 26 | 185 |
| Columbus, OH | 6b | Apr 24 | Oct 20 | 179 |
| Dayton, OH | 6a | Apr 16 | Oct 28 | 195 |
| Toledo, OH | 6b | Apr 22 | Oct 24 | 185 |
| Broken Arrow, OK | 7b | Apr 2 | Nov 2 | 214 |
| Cheyenne, OK | 7b | Apr 3 | Nov 3 | 214 |
| Edmond, OK | 7b | Apr 4 | Nov 2 | 212 |
| Lawton, OK | 7b | Mar 31 | Nov 4 | 218 |
| Norman, OK | 7b | Apr 1 | Nov 4 | 217 |
| Oklahoma City, OK | 7b | Apr 2 | Nov 4 | 216 |
| Tulsa, OK | 7b | Apr 2 | Nov 2 | 214 |
| Beaverton, OR | 8b | Mar 20 | Nov 15 | 240 |
| Bend, OR | 6b | Jun 1 | Sep 21 | 112 |
| Burns, OR | 5b | Jun 11 | Sep 6 | 87 |
| Eugene, OR | 8b | Apr 11 | Oct 23 | 195 |
| Gresham, OR | 8b | Apr 7 | Nov 6 | 213 |
| Hillsboro, OR | 8b | Apr 5 | Nov 4 | 213 |
| Medford, OR | 8b | Apr 8 | Oct 29 | 204 |
| Portland, OR | 9a | Mar 13 | Nov 19 | 251 |
| Salem, OR | 8b | Apr 15 | Nov 1 | 200 |
| Allentown, PA | 6b | Apr 25 | Oct 19 | 177 |
| Erie, PA | 7a | Apr 26 | Nov 4 | 192 |
| Philadelphia, PA | 7b | Apr 2 | Nov 10 | 222 |
| Pittsburgh, PA | 7a | Apr 18 | Oct 28 | 193 |
| Reading, PA | 7a | Apr 18 | Oct 25 | 190 |
| Providence, RI | 7a | Apr 18 | Oct 24 | 189 |
| Warwick, RI | 7a | Apr 18 | Oct 24 | 189 |
| Charleston, SC | 9a | Mar 7 | Nov 27 | 265 |
| Columbia, SC | 8a | Mar 29 | Nov 7 | 223 |
| North Charleston, SC | 9a | Mar 1 | Dec 5 | 279 |
| Aberdeen, SD | 4a | May 7 | Sep 30 | 146 |
| Brookings, SD | 4b | May 5 | Oct 2 | 150 |
| Rapid City, SD | 5a | May 12 | Oct 1 | 142 |
| Sioux Falls, SD | 5a | Apr 26 | Oct 13 | 170 |
| Brownsville, TN | 8a | Mar 29 | Nov 5 | 221 |
| Chattanooga, TN | 8a | Mar 24 | Nov 9 | 230 |
| Clarksville, TN | 7a | Apr 7 | Oct 29 | 205 |
| East Chattanooga, TN | 7b | Apr 2 | Nov 2 | 214 |
| Franklin, TN | 7b | Apr 3 | Oct 31 | 211 |
| Knoxville, TN | 7b | Apr 1 | Nov 2 | 215 |
| Memphis, TN | 8a | Mar 16 | Nov 16 | 245 |
| Murfreesboro, TN | 7b | Apr 11 | Oct 25 | 197 |
| Nashville, TN | 7b | Mar 31 | Nov 3 | 217 |
| New South Memphis, TN | 8a | Mar 21 | Nov 9 | 233 |
| Smyrna, TN | 7b | Apr 13 | Oct 21 | 191 |
| Abilene, TX | 8a | Mar 28 | Nov 7 | 224 |
| Alief, TX | 9b | Feb 13 | Dec 10 | 300 |
| Allen, TX | 8b | Mar 16 | Nov 16 | 245 |
| Amarillo, TX | 7a | Apr 15 | Oct 29 | 197 |
| Arlington, TX | 8b | Mar 11 | Nov 19 | 253 |
| Austin, TX | 9a | Mar 12 | Nov 16 | 249 |
| Beaumont, TX | 9a | Feb 24 | Nov 29 | 278 |
| Brownsville, TX | 10a | — | — | toute l’année |
| Carrollton, TX | 8b | Mar 10 | Nov 20 | 255 |
| College Station, TX | 9a | Mar 5 | Nov 23 | 263 |
| Corpus Christi, TX | 10a | Jan 15 | Dec 30 | 349 |
| Cypress, TX | 9b | Feb 13 | Dec 10 | 300 |
| Dallas, TX | 8b | Mar 10 | Nov 20 | 255 |
| Denton, TX | 8a | Mar 20 | Nov 13 | 238 |
| Edinburg, TX | 10a | — | — | toute l’année |
| El Paso, TX | 8b | Mar 2 | Nov 20 | 263 |
| Fort Worth, TX | 8b | Mar 11 | Nov 19 | 253 |
| Frisco, TX | 8b | Mar 16 | Nov 16 | 245 |
| Garland, TX | 8b | Mar 10 | Nov 20 | 255 |
| Grand Prairie, TX | 8b | Mar 10 | Nov 20 | 255 |
| Houston, TX | 9b | Feb 13 | Dec 9 | 299 |
| Irving, TX | 8b | Mar 10 | Nov 20 | 255 |
| Killeen, TX | 8b | Mar 13 | Nov 17 | 249 |
| Laredo, TX | 9b | Feb 4 | Dec 14 | 313 |
| League City, TX | 9b | Feb 6 | Dec 17 | 314 |
| Lewisville, TX | 8b | Mar 16 | Nov 16 | 245 |
| Lubbock, TX | 7b | Mar 24 | Nov 11 | 232 |
| McAllen, TX | 10a | — | — | toute l’année |
| McKinney, TX | 8b | Mar 16 | Nov 16 | 245 |
| Mesquite, TX | 8b | Mar 10 | Nov 20 | 255 |
| Midland, TX | 8a | Mar 26 | Nov 9 | 228 |
| Mission, TX | 10a | — | — | toute l’année |
| Odessa, TX | 8a | Mar 18 | Nov 13 | 240 |
| Paducah, TX | 8a | Apr 5 | Nov 3 | 212 |
| Pasadena, TX | 9b | Feb 6 | Dec 17 | 314 |
| Pearland, TX | 9b | Feb 6 | Dec 17 | 314 |
| Plano, TX | 8b | Mar 16 | Nov 16 | 245 |
| Richardson, TX | 8b | Mar 10 | Nov 20 | 255 |
| Round Rock, TX | 8b | Mar 9 | Nov 21 | 257 |
| San Angelo, TX | 8a | Mar 27 | Nov 7 | 225 |
| San Antonio, TX | 9a | Feb 26 | Nov 28 | 275 |
| Sugar Land, TX | 9b | Feb 13 | Dec 10 | 300 |
| The Woodlands, TX | 9a | Feb 25 | Nov 30 | 278 |
| Tyler, TX | 8b | Mar 12 | Nov 18 | 251 |
| Waco, TX | 8b | Mar 15 | Nov 15 | 245 |
| Wichita Falls, TX | 8a | Mar 26 | Nov 9 | 228 |
| Ogden, UT | 6a | May 13 | Oct 4 | 144 |
| Orem, UT | 7a | Apr 30 | Oct 14 | 167 |
| Provo, UT | 7a | Apr 30 | Oct 14 | 167 |
| Salt Lake City, UT | 7b | Apr 8 | Oct 31 | 206 |
| Sandy, UT | 6b | May 11 | Oct 8 | 150 |
| Sandy Hills, UT | 6b | May 11 | Oct 8 | 150 |
| West Jordan, UT | 6b | May 11 | Oct 8 | 150 |
| West Valley City, UT | 7a | Apr 19 | Oct 24 | 188 |
| Burlington, VT | 5a | Apr 29 | Oct 15 | 169 |
| Colchester, VT | 5a | May 5 | Oct 10 | 158 |
| South Burlington, VT | 5a | May 6 | Oct 9 | 156 |
| Alexandria, VA | 7b | Apr 7 | Nov 2 | 209 |
| Arlington, VA | 7b | Apr 7 | Nov 2 | 209 |
| Chesapeake, VA | 8a | Mar 26 | Nov 15 | 234 |
| East Hampton, VA | 8b | Mar 24 | Nov 17 | 238 |
| Hampton, VA | 8b | Mar 24 | Nov 17 | 238 |
| Newport News, VA | 8a | Mar 26 | Nov 15 | 234 |
| Norfolk, VA | 8b | Mar 17 | Nov 23 | 251 |
| Portsmouth, VA | 8a | Mar 26 | Nov 15 | 234 |
| Portsmouth Heights, VA | 8a | Mar 26 | Nov 15 | 234 |
| Richmond, VA | 7b | Apr 3 | Nov 4 | 215 |
| Roanoke, VA | 7b | Apr 12 | Oct 28 | 199 |
| Suffolk, VA | 8a | Apr 6 | Nov 5 | 213 |
| Virginia Beach, VA | 8b | Mar 18 | Nov 22 | 249 |
| Bellevue, WA | 9a | Mar 20 | Nov 13 | 238 |
| Bellingham, WA | 8a | Apr 5 | Oct 31 | 209 |
| Everett, WA | 9a | Mar 20 | Nov 13 | 238 |
| Federal Way, WA | 8b | Mar 28 | Nov 8 | 225 |
| Kent, WA | 8b | Mar 28 | Nov 8 | 225 |
| Kirkland, WA | 9a | Mar 20 | Nov 13 | 238 |
| Olympia, WA | 8a | Apr 29 | Oct 14 | 168 |
| Pasco, WA | 7b | Apr 27 | Oct 11 | 167 |
| Renton, WA | 8b | Mar 28 | Nov 8 | 225 |
| Seattle, WA | 9a | Mar 2 | Nov 23 | 266 |
| Spokane, WA | 6b | Apr 26 | Oct 12 | 169 |
| Spokane Valley, WA | 6b | May 7 | Oct 1 | 147 |
| Tacoma, WA | 8b | Mar 28 | Nov 8 | 225 |
| Tri-Cities, WA | 7b | Apr 14 | Oct 21 | 190 |
| Vancouver, WA | 8b | Apr 5 | Nov 4 | 213 |
| Yakima, WA | 7a | May 8 | Oct 4 | 149 |
| Beckley, WV | 6b | Apr 22 | Oct 21 | 182 |
| Charleston, WV | 7a | Apr 16 | Oct 26 | 193 |
| Huntington, WV | 7a | Apr 16 | Oct 27 | 194 |
| Parkersburg, WV | 6b | Apr 24 | Oct 22 | 181 |
| Green Bay, WI | 5b | May 7 | Oct 9 | 155 |
| Kenosha, WI | 6a | Apr 25 | Oct 21 | 179 |
| Madison, WI | 5a | May 1 | Oct 10 | 162 |
| Milwaukee, WI | 6a | Apr 27 | Oct 20 | 176 |
| Casper, WY | 5a | May 26 | Sep 22 | 119 |
| Cheyenne, WY | 5b | May 17 | Sep 27 | 133 |
| Gillette, WY | 5a | May 20 | Sep 26 | 129 |
L’essentiel : une date moyenne de dernier gel est une probabilité de 50 %, pas une promesse —
une année sur deux gèle après. Semez le gélif en visant la date des 10 % si tout recommencer vous ferait mal.
Comment tout cela est bâti
Pour les 116 lieux dotés d’une station, les dates de gel sont des normales observées en station, tirées des U.S. Climate Normals 1991–2020 de la NOAA (éléments
ANN-TMIN-PRBLST-T32FP50 et -PRBFST-, aux seuils de probabilité de 50 % et 10 %).
Les 425 autres lieux sont estimés à partir d’une grille climatique d’un demi-degré interpolée depuis ces mêmes normales, et chacune de ces pages le signale.
Les zones de rusticité viennent de l’USDA Plant Hardiness Zone Map 2023. Le calendrier des cultures est stocké en décalages de jours
par rapport à vos propres gelées, d’après les guides de semis des Extensions universitaires ; les dates d’automne
utilisent le comptage à rebours standard de l’Extension, « facteur d’automne » compris, pour les jours qui raccourcissent.
Votre commune n’y est pas ? L’application Moon Phase Garden situe votre position exacte sur la grille complète des normales climatiques plutôt que sur la grande station la plus proche, et vous laisse la corriger par ce que fait vraiment votre jardin. Gratuite et sans publicité.