| Montana Location | USDA Hardiness Zone(s) |
| Absarokee | Zone 4b |
| Alberton | Zone 5b |
| Alder | Zone 5a |
| Alzada | Zone 4a |
| Amsterdam | Zone 4b |
| Anaconda-Deer Lodge County | Zone 3b, 4a, 4b, 5a |
| Antelope | Zone 3b |
| Arlee | Zone 5b |
| Ashland | Zone 4a |
| Augusta | Zone 4a |
| Avon | Zone 4a |
| Azure | Zone 4a, 4b |
| Babb | Zone 4a |
| Bainville | Zone 3b |
| Baker | Zone 4a |
| Ballantine | Zone 4b |
| Basin | Zone 4a, 4b, 5a |
| Batavia | Zone 5a |
| Bear Dance | Zone 5b, 6a |
| Bearcreek | Zone 4b |
| Beaver Creek | Zone 3b, 4a |
| Beaverhead County | Zone 3a, 3b, 4a, 4b, 5a, 5b |
| Belfry | Zone 4b |
| Belgrade | Zone 4a |
| Belknap | Zone 6a |
| Belt | Zone |
| Biddle | Zone 4a |
| Big Arm | Zone 5b, 6a |
| Big Horn County | Zone 3b, 4a, 4b, 5a, 5b |
| Big Sandy | Zone 4a |
| Big Sky | Zone 4a, 4b, 5a |
| Big Timber | Zone 4b |
| Bigfork | Zone 5a, 5b |
| Billings | Zone 4b, 5a |
| Birney | Zone 4a, 4b, 5a |
| Black Eagle | Zone 4a |
| Blaine County | Zone 3b, 4a, 4b, 5a |
| Boneau | Zone 4a |
| Bonner-West Riverside | Zone 5b |
| Boulder | Zone 4a |
| Box Elder | Zone 4a |
| Boyd | Zone 4b |
| Bozeman | Zone 4b, 5a |
| Brady | Zone 4a |
| Bridger | Zone 4b |
| Bridger | Zone 4a, 4b |
| Broadus | Zone 4a |
| Broadview | Zone 4b |
| Broadwater County | Zone 4a, 4b, 5a |
| Brockton | Zone 3b |
| Browning | Zone 4a |
| Busby | Zone 4a |
| Butte-Silver Bow (balance) | Zone 3b, 4a, 4b, 5a |
| Bynum | Zone 4a |
| Camas | Zone 5b |
| Camp Three | Zone 4b |
| Carbon County | Zone 3a, 3b, 4a, 4b, 5a, 5b |
| Cardwell | Zone 4b |
| Carlton | Zone 5b |
| Carter | Zone 4a |
| Carter County | Zone 3b, 4a, 4b |
| Cascade | Zone 4a |
| Cascade County | Zone 3b, 4a, 4b |
| Charlo | Zone 5b |
| Charlos Heights | Zone 5b |
| Chester | Zone 3b |
| Chinook | Zone 3b |
| Choteau | Zone 4b |
| Chouteau County | Zone 3b, 4a, 4b |
| Churchill | Zone 4b |
|
| Clancy | Zone 4b |
| Clinton | Zone 4b, 5a |
| Clyde Park | Zone 4b |
| Colstrip | Zone 4b |
| Columbia Falls | Zone 5a |
| Columbus | Zone 4b |
| Condon | Zone 4b, 5a |
| Conner | Zone 5a |
| Conrad | Zone 4a |
| Cooke City | Zone 4a |
| Coram | Zone 5a |
| Corvallis | Zone 5b |
| Corwin Springs | Zone 4b, 5a |
| Craig | Zone 4b |
| Crane | Zone 4a |
| Crow Agency | Zone 4a |
| Culbertson | Zone 3b |
| Custer | Zone 4a |
| Custer County | Zone 3b, 4a, 4b |
| Cut Bank | Zone 4a |
| Daniels County | Zone 3b, 4a |
| Darby | Zone 5b |
| Dawson County | Zone 3b, 4a, 4b |
| Dayton | Zone 6a |
| De Borgia | Zone 5b, 6a |
| Deer Lodge | Zone 4a |
| Deer Lodge County | Zone 3b, 4a, 4b, 5a |
| Denton | Zone 3b |
| Dillon | Zone 4b |
| Dixon | Zone 6a |
| Dodson | Zone 3b |
| Drummond | Zone 4a |
| Dupuyer | Zone 4a |
| Dutton | Zone 4a |
| East Glacier Park Village | Zone 4a |
| East Helena | Zone 4b |
| East Missoula | Zone 5b |
| Edgar | Zone 4b |
| Ekalaka | Zone 4a |
| Elkhorn | Zone 4b |
| Elliston | Zone 3b, 4a, 4b |
| Elmo | Zone |
| Emigrant | Zone 4b |
| Ennis | Zone 5a |
| Eureka | Zone 5a |
| Evaro | Zone 5a, 5b |
| Evergreen | Zone 5a |
| Fairfield | Zone 4b |
| Fairview | Zone 4a |
| Fallon | Zone 3b |
| Fallon County | Zone 3b, 4a, 4b |
| Fergus County | Zone 3b, 4a, 4b |
| Finley Point | Zone 5b, 6a |
| Flathead County | Zone 3a, 3b, 4a, 4b, 5a, 5b, 6a |
| Flaxville | Zone 4a |
| Florence | Zone 5b |
| Forest Hill Village | Zone 5b |
| Forsyth | Zone 4a |
| Fort Belknap Agency | Zone 3b, 4a |
| Fort Benton | Zone 4a |
| Fort Peck | Zone 4a |
| Fort Shaw | Zone 4a |
| Fort Smith | Zone 5a |
| Fortine | Zone 5a |
| Four Corners | Zone 4b |
| Fox Lake | Zone 4a |
| Frazer | Zone 3b |
| Frenchtown | Zone 5b |
| Froid | Zone 3b |
|
| Gallatin County | Zone 3a, 3b, 4a, 4b, 5a |
| Gallatin Gateway | Zone 4b |
| Gallatin River Ranch | Zone 4b |
| Gardiner | Zone 4b, 5a |
| Garfield County | Zone 3b, 4a, 4b |
| Garrison | Zone 4a, 4b |
| Geraldine | Zone 4a |
| Geyser | Zone 4a |
| Gibson Flats | Zone 4a |
| Gildford | Zone 3b |
| Glacier County | Zone 3a, 3b, 4a, 4b |
| Glasgow | Zone 4a |
| Glendive | Zone 4a |
| Golden Valley County | Zone 4a, 4b |
| Granite County | Zone 4a, 4b, 5a, 5b |
| Grass Range | Zone 4b |
| Great Falls | Zone 4a |
| Greycliff | Zone 4b |
| Hamilton | Zone 5b |
| Happys Inn | Zone 4b, 5a |
| Hardin | Zone 4b |
| Harlem | Zone 3b |
| Harlowton | Zone 4b |
| Harrison | Zone 5a |
| Havre | Zone 4a |
| Havre North | Zone 4a |
| Hays | Zone 4a, 4b, 5a |
| Heart Butte | Zone 4a |
| Hebgen Lake Estates | Zone 3b |
| Helena | Zone 4b |
| Helena Flats | Zone 5a |
| Helena Valley Northeast | Zone 4a, 4b |
| Helena Valley Northwest | Zone 4a, 4b |
| Helena Valley Southeast | Zone 4b |
| Helena Valley West Central | Zone 4b |
| Helena West Side | Zone 4b |
| Heron | Zone 6a |
| Herron | Zone 3b, 4a |
| Highwood | Zone 4a |
| Hill County | Zone 3b, 4a, 4b |
| Hingham | Zone 3b |
| Hinsdale | Zone 3b |
| Hobson | Zone 4a |
| Hot Springs | Zone 5b |
| Hungry Horse | Zone 5b |
| Huntley | Zone 4b |
| Huson | Zone 5b |
| Hysham | Zone 4a |
| Indian Springs | Zone 4b, 5a |
| Inverness | Zone 4a |
| Ismay | Zone 4a |
| Jardine | Zone 4a, 4b, 5a |
| Jefferson City | Zone 4a, 4b |
| Jefferson County | Zone 4a, 4b, 5a |
| Jette | Zone 6a |
| Joliet | Zone 4b |
| Joplin | Zone 4a |
| Jordan | Zone 3b |
| Judith Basin County | Zone 3b, 4a, 4b |
| Judith Gap | Zone 4a |
| Kalispell | Zone 5a, 5b |
| Kerr | Zone 6a |
| Kevin | Zone 4a |
| Kicking Horse | Zone 5b |
| Kila | Zone 5a |
| King Arthur Park | Zone 4b |
| Kings Point | Zone 6a |
| Klein | Zone 4b |
| Kremlin | Zone 3b |
|
| Lake Mary Ronan | Zone 5b |
| Lakeside | Zone 5a, 5b |
| Lame Deer | Zone 4a, 4b, 5a |
| Laurel | Zone 4b |
| Lavina | Zone 4b |
| Lewis and Clark County | Zone 3b, 4a, 4b, 5a |
| Lewistown | Zone 4a, 4b |
| Lewistown Heights | Zone 4a |
| Libby | Zone 5b |
| Liberty County | Zone 3b, 4a, 4b |
| Lima | Zone 5a |
| Lincoln | Zone 4a |
| Lincoln County | Zone 4a, 4b, 5a, 5b, 6a, 6b |
| Lindisfarne | Zone 5b, 6a |
| Little Bitterroot Lake | Zone 4b |
| Little Browning | Zone 4a |
| Livingston | Zone 4b |
| Lockwood | Zone 4b, 5a |
| Lodge Grass | Zone |
| Lodge Pole | Zone 4a, 4b, 5a |
| Logan | Zone 4b |
| Lolo | Zone 5b |
| Loma | Zone 3b, 4a |
| Lonepine | Zone 5b, 6a |
| Madison County | Zone 3b, 4a, 4b, 5a, 5b |
| Malmstrom AFB | Zone 4a |
| Malta | Zone 3b |
| Manhattan | Zone 4b |
| Marion | Zone 4b, 5a |
| Martin City | Zone 5a |
| Martinsdale | Zone 4a |
| Marysville | Zone 4b |
| Maxville | Zone 4a, 4b, 5a |
| McCone County | Zone 3b, 4a, 4b |
| Meagher County | Zone 3b, 4a, 4b, 5a |
| Medicine Lake | Zone 3b |
| Melstone | Zone 4a |
| Midvale | Zone 5a |
| Miles City | Zone 4a |
| Mineral County | Zone 5a, 5b, 6a, 6b |
| Missoula | Zone 5a, 5b |
| Missoula County | Zone 4a, 4b, 5a, 5b, 6a |
| Montana City | Zone 4b |
| Moore | Zone 4a |
| Muddy | Zone 3b, 4a, 4b |
| Musselshell | Zone 4a, 4b |
| Musselshell County | Zone 4a, 4b, 5a |
| Nashua | Zone 4a |
| Neihart | Zone 3b, 4a |
| Niarada | Zone 5a, 5b, 6a |
| North Browning | Zone 4a |
| Noxon | Zone 6a |
| Old Agency | Zone 6a |
| Olney | Zone 4b |
| Opheim | Zone 3b |
| Orchard Homes | Zone 5b |
| Outlook | Zone 3b |
| Ovando | Zone 4a |
| Pablo | Zone 5b, 6a |
| Paradise | Zone 6a |
| Park City | Zone 4b |
| Park County | Zone 3a, 3b, 4a, 4b, 5a |
| Parker School | Zone 4a, 4b |
| Petroleum County | Zone 3b, 4a, 4b |
| Philipsburg | Zone 4b |
| Phillips County | Zone 3b, 4a, 4b, 5a |
| Piltzville | Zone 5a |
| Pinesdale | Zone 5b |
| Pioneer Junction | Zone 5b |
|
| Plentywood | Zone 3b |
| Plevna | Zone 4a |
| Polson | Zone 5b, 6a |
| Pondera County | Zone 3b, 4a, 4b |
| Ponderosa Pines | Zone 4b, 5a |
| Pony | Zone 4b |
| Poplar | Zone 3b |
| Powder River County | Zone 3b, 4a, 4b, 5a |
| Powell County | Zone 3b, 4a, 4b, 5a, 5b |
| Power | Zone 4a |
| Prairie County | Zone 3b, 4a, 4b |
| Pray | Zone 4b, 5a |
| Pryor | Zone 4b, 5a |
| Rader Creek | Zone 4b, 5a |
| Radersburg | Zone 4b |
| Ravalli | Zone 5b |
| Ravalli County | Zone 4a, 4b, 5a, 5b, 6a |
| Red Lodge | Zone 4b |
| Reed Point | Zone 4b |
| Reserve | Zone 3b |
| Rexford | Zone 5a |
| Richey | Zone 4a |
| Richland County | Zone 3b, 4a |
| Riverbend | Zone 5b, 6a |
| Roberts | Zone 5a |
| Rocky Boy West | Zone 4a |
| Rocky Boy's Agency | Zone 4a, 4b |
| Rocky Point | Zone 6a |
| Rollins | Zone 5b |
| Ronan | Zone 5b |
| Roosevelt County | Zone 3b, 4a |
| Roscoe | Zone 5a |
| Rosebud | Zone 4a |
| Rosebud County | Zone 3b, 4a, 4b, 5a, 5b |
| Roundup | Zone 4b |
| Roy | Zone 4b |
| Rudyard | Zone 4a |
| Ryegate | Zone 4a |
| Saco | Zone 3b |
| Saddle Butte | Zone 4a |
| Sand Coulee | Zone 4a |
| Sanders County | Zone 4b, 5a, 5b, 6a, 6b |
| Sangrey | Zone 4a |
| Santa Rita | Zone 4a |
| Savage | Zone 4a |
| Scobey | Zone 3b |
| Sedan | Zone 4a, 4b, 5a |
| Seeley Lake | Zone 4a, 4b, 5a |
| Shawmut | Zone 4a |
| Shelby | Zone 4a |
| Shepherd | Zone 4b |
| Sheridan | Zone 4b |
| Sheridan County | Zone 3a, 3b, 4a |
| Sidney | Zone 4a |
| Silesia | Zone 4b |
| Silver Bow County | Zone 3b, 4a, 4b, 5a |
| Silver Gate | Zone 4a, 4b |
| Simms | Zone 4a |
| Somers | Zone 5a, 5b |
| South Browning | Zone 4a |
| South Glastonbury | Zone 4b, 5a |
| South Hills | Zone 4b |
| Spokane Creek | Zone 4b |
| Springdale | Zone 4b |
| Springhill | Zone 4a, 4b |
| St. Ignatius | Zone 5b |
| St. Marie | Zone 3b, 4a |
| St. Pierre | Zone 4a, 4b |
| St. Regis | Zone 6a |
|
| Stanford | Zone 4a |
| Starr School | Zone 4a |
| Stevensville | Zone 5b |
| Stillwater County | Zone 3a, 3b, 4a, 4b, 5a |
| Stockett | Zone 4a |
| Stryker | Zone 4b |
| Sula | Zone 4b |
| Sun Prairie | Zone 4a |
| Sun River | Zone 4a |
| Sunburst | Zone 4a |
| Superior | Zone 5b, 6a |
| Swan Lake | Zone 5a, 5b |
| Sweet Grass | Zone 4a |
| Sweet Grass County | Zone 3a, 3b, 4a, 4b, 5a |
| Sylvanite | Zone 5a, 5b |
| Terry | Zone 3b |
| Teton County | Zone 3b, 4a, 4b |
| The Silos | Zone 4b |
| Thompson Falls | Zone 6a |
| Three Forks | Zone 4b |
| Toole County | Zone 3b, 4a |
| Toston | Zone 4b |
| Townsend | Zone 4b |
| Treasure County | Zone 3b, 4a, 4b, 5a |
| Trego | Zone 4b, 5a |
| Trout Creek | Zone 6a |
| Troy | Zone 6a |
| Turah | Zone 5a |
| Turner | Zone 3b |
| Turtle Lake | Zone 5b |
| Twin Bridges | Zone 4b |
| Ulm | Zone 4a |
| Valier | Zone 4a |
| Valley County | Zone 3b, 4a, 4b |
| Vaughn | Zone 4a |
| Victor | Zone 5b |
| Virginia City | Zone 4b |
| Walkerville | Zone 4b |
| Weeksville | Zone 6a |
| West Glacier | Zone 5a |
| West Glendive | Zone 4a |
| West Havre | Zone 4a |
| West Kootenai | Zone 5a |
| West Yellowstone | Zone 3b |
| Westby | Zone 3b |
| Wheatland | Zone 4b, 5a |
| Wheatland County | Zone 4a, 4b, 5a |
| White Haven | Zone 5b |
| White Sulphur Springs | Zone 4a |
| Whitefish | Zone 4b, 5a |
| Whitehall | Zone 4b |
| Whitewater | Zone 3b |
| Wibaux | Zone 4a |
| Wibaux County | Zone 4a, 4b |
| Willow Creek | Zone 4b |
| Wilsall | Zone 4a |
| Wineglass | Zone 4b |
| Winifred | Zone 4a |
| Winnett | Zone 4a |
| Winston | Zone 4b |
| Wisdom | Zone 3a |
| Wolf Point | Zone 3b |
| Woods Bay | Zone 5b |
| Worden | Zone 4b |
| Wye | Zone 5a, 5b |
| Wyola | Zone 4a, 4b |
| Yaak | Zone 4b, 5a |
| Yellowstone County | Zone 4a, 4b, 5a, 5b |
| Zortman | Zone 4b |