Add to my tools

Idaho Planting Zones

Idaho covers USDA hardiness zones 4a to 7b on the 2023 map. The most common zone is 6b (28% of ZIP codes), where the coldest winter night averages -5 to 0 °F. Boise is zone 6b–7a, Idaho Falls is zone 5b and Pocatello is zone 6a–6b.

Zones in Idaho

Share of the state’s ZIP codes in each zone.

4a 1% -30 to -25 °F
4b 1% -25 to -20 °F
5a 13% -20 to -15 °F
5b 14% -15 to -10 °F
6a 17% -10 to -5 °F
6b 28% -5 to 0 °F
7a 26% 0 to 5 °F
7b 1% 5 to 10 °F

Major cities

Boise 6b–7a
Idaho Falls 5b
Pocatello 6a–6b
Nampa 7a
Caldwell 7a
Coeur d'Alene 6b–7a
Rexburg 5a
Meridian 7a
Moscow 6b
Post Falls 6b
Sun Valley 5b
Twin Falls 6b

Every city and town in Idaho

Aberdeen 83210 5b
Ahsahka 83520 7a
Albion 83311 6b
Almo 83312 6a
American Falls 83211 6a
Arbon 83212 6a
Arco 83213 5a
Arimo 83214 6b
Ashton 83420 5a
Athol 83801 6b
Avery 83802 6b
Bancroft 83217 5a
Banks 83602 7a
Basalt 83218 5b
Bayview 83803 6b
Bellevue 83313 5b
Bern 83220 5a
Blackfoot 83221 5b
Blanchard 83804 6b
Bliss 83314 7a
Bloomington 83223 5a
Boise 83701+ 6b–7a
Bonners Ferry 83805 6a
Bovill 83806 6a
Bruneau 83604 7a
Buhl 83316 7a
Burley 83318 6b
Calder 83808 6b
Caldwell 83605+ 7a
Cambridge 83610 7a
Carey 83320 6a
Careywood 83809 6b
Carmen 83462 5b
Cascade 83611 5a
Castleford 83321 6b
Cataldo 83810 6b
Challis 83226 5b
Chester 83421 5a
Clark Fork 83811 6b
Clarkia 83812 6a
Clayton 83227 5b
Clifton 83228 6b
Cobalt 83229 5b
Cocolalla 83813 6b
Coeur d'Alene 83814+ 6b–7a
Colburn 83865 6b
Coolin 83821 6a
Corral 83322 5a
Cottonwood 83522 6b
Council 83612 6a
Craigmont 83523 6b
Culdesac 83524 7a
Dayton 83232 6a
Deary 83823 6b
Declo 83323 6a
Desmet 83824 6b
Dietrich 83324 6a
Dingle 83233 5a
Donnelly 83615 5a
Dover 83825 6b
Downey 83234 6b
Driggs 83422 5a
Dubois 83423 5b
Eagle 83616 7a
Eastport 83826 6a
Eden 83325 6b
Elk City 83525 5b
Elk River 83827 6b
Ellis 83235 5b
Emmett 83617 7a
Fairfield 83327 6a
Felt 83424 5a
Fenn 83531 6b
Ferdinand 83526 6a
Fernwood 83830 6b
Filer 83328 7a
Firth 83236 5b
Fish Haven 83287 5b
Fort Hall 83203 5b
Franklin 83237 6a
Fruitland 83619 7a
Garden City 83714 7a
Garden Valley 83622 6b
Genesee 83832 7a
Geneva 83238 5b
Georgetown 83239 5b
Gibbonsville 83463 5b
Glenns Ferry 83623 7a
Gooding 83330 6b
Grace 83241 5b
Grand View 83624 7a
Grangeville 83530 6b
Greencreek 83533 6b
Greenleaf 83626 7a
Hagerman 83332 7a
Hailey 83333 6a
Hamer 83425 5a
Hammett 83627 7a
Hansen 83334 6b
Harrison 83833 6b
Harvard 83834 6b
Hayden 83835 6b
Hazelton 83335 6b
Heyburn 83336 6b
Hill City 83337 5a
Holbrook 83243 6a
Homedale 83628 7a
Hope 83836 6b
Horseshoe Bend 83629 7a
Howe 83244 5a
Huston 83630 7a
Idaho City 83631 6b
Idaho Falls 83401+ 5b
Indian Valley 83632 6a
Inkom 83245 6a
Iona 83427 5b
Irwin 83428 6a
Island Park 83429 4a
Jerome 83338 6b
Juliaetta 83535 7b
Kamiah 83536 7a
Kellogg 83837 6b
Kendrick 83537 7a
Ketchum 83340 5b
Kimberly 83341 6b
King Hill 83633 7a
Kingston 83839 6b
Kooskia 83539 5b
Kootenai 83840 6b
Kuna 83634 7a
Laclede 83841 6b
Lake Fork 83635 5a
Lapwai 83540 7b
Lava Hot Springs 83246 6b
Leadore 83464 5a
Lemhi 83465 5b
Lenore 83541 7a
Letha 83636 7a
Lewiston 83501 7b
Lewisville 83431 5a
Lowman 83637 6a
Lucile 83542 7a
Mackay 83251 5a
Macks Inn 83433 4a
Malad City 83252 6a
Malta 83342 6a
Marsing 83639 7a
May 83253 5a
McCall 83638 5a
McCammon 83250 5b
Medimont 83842 6b
Melba 83641 7a
Menan 83434 5a
Meridian 83642+ 7a
Meridian (Boise) 83646 7a
Mesa 83643 6a
Middleton 83644 7a
Midvale 83645 6a
Minidoka 83343 6a
Monteview 83435 4b
Montpelier 83254 5a
Moore 83255 5a
Moscow 83843+ 6b
Mountain Home 83647 6b
Mountain Home Afb 83648 7a
Moyie Springs 83845 6b
Mullan 83846 6a
Murphy 83650 7a
Murray 83874 6a
Murtaugh 83344 6b
Nampa 83651+ 7a
Naples 83847 6b
New Meadows 83654 6a
New Plymouth 83655 7a
Newdale 83436 5a
Nezperce 83543 6b
Nordman 83848 6a
North Fork 83466 6a
Notus 83656 7a
Oakley 83346 6b
Ola 83657 7a
Oldtown 83822 6a
Orofino 83544 7a
Osburn 83849 6b
Paris 83261 5a
Parker 83438 5a
Parma 83660 7a
Paul 83347 6a
Payette 83661 6b
Peck 83545 7a
Picabo 83348 6a
Pierce 83546 6a
Pinehurst 83850 6b
Pingree 83262 5b
Placerville 83666 6b
Plummer 83851 6b
Pocatello 83201+ 6a–6b
Pollock 83547 6b
Ponderay 83852 6b
Post Falls 83854+ 6b
Potlatch 83855 6b
Preston 83263 6a
Priest River 83856 6a
Princeton 83857 6b
Rathdrum 83858 6b
Reubens 83548 6b
Rexburg 83440+ 5a
Richfield 83349 6a
Rigby 83442 5b
Riggins 83549 6b
Ririe 83443 5b
Roberts 83444 5a
Rockland 83271 6a
Rogerson 83302 6a
Rupert 83350 6a
Sagle 83860 6b
Saint Anthony 83445 5a
Saint Charles 83272 5a
Saint Maries 83861 6b
Salmon 83467 5b
Sandpoint 83864 6a
Santa 83866 6b
Shelley 83274 5b
Shoshone 83352 6a
Shoup 83469 5b
Silverton 83867 6b
Smelterville 83868 6b
Soda Springs 83276 5a
Spencer 83446 5b
Spirit Lake 83869 6b
Springfield 83277 5b
Stanley 83278 5b
Star 83669 7a
Stites 83552 7a
Sugar City 83448 5a
Sun Valley 83353+ 5b
Swan Valley 83449 6a
Swanlake 83281 5b
Sweet 83670 7a
Tendoy 83468 5b
Tensed 83870 6b
Terreton 83450 4b
Teton 83451 5a
Tetonia 83452 5a
Thatcher 83283 6a
Troy 83871 6b
Twin Falls 83301+ 6b
Victor 83455 5a
Viola 83872 6b
Wallace 83873 6b
Warren 83671 5a
Wayan 83285 5b
Weippe 83553 6b
Weiser 83672 7a
Wendell 83355 6b
Weston 83286 6a
White Bird 83554 7a
Wilder 83676 7a
Winchester 83555 6b
Worley 83876 6b
Yellow Pine 83677 5a

Other states

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

Zones: 2023 USDA Plant Hardiness Zone Map ZIP code data, USDA Agricultural Research Service and the PRISM Climate Group, Oregon State University (official map). Place names: GeoNames (CC BY 4.0). Each ZIP code gets one zone, but a ZIP code can cross a zone line, and hills, valleys and towns can be warmer or colder than the zone shown.

About the Hardiness Zone Map

The Hardiness Zone Map finds your USDA plant hardiness zone, also called your planting or growing zone, from your ZIP code. Zones are based on the average coldest winter night of the year: each zone is 10 °F wide and split into a and b halves of 5 °F, from zone 1a in Alaska to 13b in Puerto Rico. Plant labels and seed packets give the coldest zone a plant can survive, so knowing your zone tells you which perennials, shrubs and trees can stay outside all winter. Zones come from the official 2023 USDA map ZIP code data for all 50 states, Washington DC and Puerto Rico.

How to use it

1 Enter your 5-digit ZIP code and press Find my zone.
2 Read your zone and the average coldest winter temperature it stands for.
3 Open your state to see its zones and the zone of every city.
4 Choose plants rated for your zone number or a colder (lower) one.

Frequently asked questions

What growing zone is Idaho?

Idaho spans zones 4a–7b. Zone 6b is the most common, covering 28% of the state's ZIP codes. Enter your ZIP code above for your exact zone.

What planting zone is Boise, ID?

Boise is in USDA zone 6b–7a, depending on the ZIP code. Its average coldest winter night is -5 to 5 °F.

What planting zone is Idaho Falls, ID?

Idaho Falls is in USDA zone 5b. Its average coldest winter night is -15 to -10 °F.

What planting zone is Pocatello, ID?

Pocatello is in USDA zone 6a–6b, depending on the ZIP code. Its average coldest winter night is -10 to 0 °F.

What is the coldest zone in Idaho?

The coldest part of Idaho is zone 4a, with winter lows of -30 to -25 °F. The warmest is zone 7b, at 5 to 10 °F.

How are planting zones worked out?

Each zone is a 10 °F band of the average coldest winter night over 1991–2020, split into a and b halves of 5 °F. The map does not show summer heat, rainfall or frost dates, so check local advice before planting.

Related tools

Visited Places Map

Colour the countries, states and provinces you’ve been to, share your map and send friends places to visit

Where Food Grows

See which countries grow the most rice, mango, coffee, cocoa and 69 more crops on an animated world map

Unit Converter

Convert units of measurement

Date Calculator

Days between dates, add days, and working days with holidays

Taste Map

The most famous dish and street food of 193 countries: tick the ones you’ve tried and colour your world map

Where Animals Live

See every country where tigers, lions, pandas, penguins, hilsa and 200 more wild animals and fish live