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Colorado Planting Zones

Colorado covers USDA hardiness zones 4a to 7a on the 2023 map. The most common zone is 6a (44% of ZIP codes), where the coldest winter night averages -10 to -5 °F. Colorado Springs is zone 5b–6a, Denver is zone 6a and Aurora is zone 6a.

Zones in Colorado

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

4a <1% -30 to -25 °F
4b 2% -25 to -20 °F
5a 12% -20 to -15 °F
5b 35% -15 to -10 °F
6a 44% -10 to -5 °F
6b 6% -5 to 0 °F
7a 2% 0 to 5 °F

Major cities

Colorado Springs 5b–6a
Denver 6a
Aurora 6a
Pueblo 5b–6a
Boulder 6a
Fort Collins 5b
Arvada 6a
Englewood 6a
Grand Junction 6b–7a
Littleton 6a
Aurora (Adams) 6a
Denver (Adams) 6a

Every city and town in Colorado

Agate 80101 5b
Aguilar 81020 6a
Akron 80720 5b
Alamosa 81101 4b
Allenspark 80510 5b
Alma 80420 5a
Almont 81210 5a
Amherst 80721 5b
Anton 80801 5b
Antonito 81120 5b
Arapahoe 80802 6a
Arboles 81121 6b
Arlington 81021 5b
Arriba 80804 5b
Arvada 80001+ 6a
Aspen 81611+ 5a
Atwood 80722 5b
Ault 80610 5a
Aurora 80010+ 6a
Aurora (Adams) 80011+ 6a
Austin 81410 6b
Avon 81620 6a
Avondale 81022 6a
Bailey 80421 5b
Basalt 81621 6a
Battlement Mesa 81636 6b
Bayfield 81122 6a
Bedrock 81411 6b
Bellvue 80512 5b
Bennett 80102 6a
Berthoud 80513 5b
Bethune 80805 6a
Beulah 81023 6a
Black Hawk 80422 5b
Blanca 81123 5a
Boncarbo 81024 6a
Bond 80423 5b
Boone 81025 6a
Boulder 80301+ 6a
Branson 81027 6a
Breckenridge 80424 5a
Briggsdale 80611 5a
Brighton 80601+ 5b–6a
Broomfield 80020+ 6a
Broomfield (Broomfield) 80023 6a
Broomfield (Jefferson) 80021 6a
Brush 80723 5b
Buena Vista 81211 5b
Buffalo Creek 80425 5b
Burlington 80807 6a
Burns 80426 5b
Byers 80103 5b
Cahone 81320 6b
Calhan 80808 5b
Campo 81029 6b
Canon City 81212+ 6a
Capulin 81124 5a
Carbondale 81623 6a
Carr 80612 5b
Cascade 80809 5b
Castle Rock 80104+ 5b
Cedaredge 81413 5b
Center 81125 5a
Central City 80427 5b
Chama 81126 5b
Cheraw 81030 6a
Cheyenne Wells 80810 6a
Chromo 81128 5b
Cimarron 81220 5b
Clark 80428 5a
Clifton 81520 7a
Climax 80429 5a
Coal Creek 81221 6a
Coaldale 81222 5b
Coalmont 80430 4b
Collbran 81624 6a
Colorado City 81019 6a
Colorado Springs 80901+ 5b–6a
Commerce City 80022+ 6a
Como 80432 5a
Conejos 81129 5a
Conifer 80433 5b
Cope 80812 5b
Cortez 81321 7a
Cory 81414 6b
Cotopaxi 81223 5b
Cowdrey 80434 4b
Craig 81625+ 4a–5a
Crawford 81415 6a
Creede 81130 5a
Crested Butte 81224+ 5a
Crestone 81131 5a
Cripple Creek 80813 5b
Crook 80726 5b
Crowley 81034 5b
Dacono 80514 5b
De Beque 81630 6b
Deer Trail 80105 5b
Del Norte 81132 5b
Delta 81416 6b
Denver 80201+ 6a
Denver (Adams) 80221+ 6a
Denver (Jefferson) 80214+ 6a
Dillon 80435 5a
Dinosaur 81610+ 5b–6a
Divide 80814 5b
Dolores 81323 6a
Dove Creek 81324 6b
Drake 80515 5b
Dumont 80436 5b
Dupont 80024 6a
Durango 81301+ 6a–6b
Eads 81036 6a
Eagle 81631 5b
Eaton 80615 5a
Eckert 81418 6b
Eckley 80727 5b
Edwards 81632 5b
Egnar 81325 6b
Elbert 80106 5b
Eldorado Springs 80025 6a
Elizabeth 80107 5b
Empire 80438 5a
Englewood 80110+ 6a
Erie 80516 5b
Estes Park 80511+ 5a–5b
Evans 80620 5b
Evergreen 80437+ 5b
Fairplay 80440 5b
Firestone 80520 5b
Flagler 80815 5b
Fleming 80728 5b
Florence 81226+ 6a
Florissant 80816 5a
Fort Collins 80521+ 5b
Fort Garland 81133 5b
Fort Lupton 80621 5b
Fort Lyon 81038 6a
Fort Morgan 80701 5b
Fountain 80817 6a
Fowler 81039 6a
Franktown 80116 5b
Fraser 80442 5b
Frederick 80530 5b
Frisco 80443 5a
Fruita 81521 7a
Galeton 80622 5a
Gardner 81040 6a
Gateway 81522 6b
Genoa 80818 5b
Georgetown 80444 5a
Gilcrest 80623 5a
Gill 80624 5a
Glade Park 81523 6b
Glen Haven 80532 5b
Glenwood Springs 81601+ 6a
Golden 80401+ 5b–6a
Granada 81041 6a
Granby 80446 5a
Grand Junction 81501+ 6b–7a
Grand Lake 80447 5a
Granite 81228 5a
Grant 80448 5b
Greeley 80631+ 5a–5b
Green Mountain Falls 80819 5b
Grover 80729 5a
Guffey 80820 5b
Gunnison 81230 5b
Gypsum 81637 5b
Hamilton 81638 5b
Hartman 81043 6a
Hartsel 80449 4a
Hasty 81044 6a
Haswell 81045 5b
Haxtun 80731 5b
Hayden 81639 5a
Henderson 80640 5b
Hereford 80732 5a
Hesperus 81326 6a
Hillrose 80733 5b
Hillside 81232 5b
Hoehne 81046 6a
Holly 81047 6a
Holyoke 80734 5b
Homelake 81135 4b
Hooper 81136 5a
Hot Sulphur Springs 80451 5b
Hotchkiss 81419 6b
Howard 81233 5b
Hudson 80642 5b
Hugo 80821 5b
Hygiene 80533 6a
Idaho Springs 80452 5b
Idalia 80735 6a
Idledale 80453 5b
Ignacio 81137 6a
Iliff 80736 5b
Indian Hills 80454 5b
Jamestown 80455 5b
Jaroso 81138 5a
Jefferson 80456 5a
Joes 80822 5b
Johnstown 80534 5b
Julesburg 80737 5b
Karval 80823 5b
Keenesburg 80643 5b
Kersey 80644 5a
Kim 81049 6a
Kiowa 80117 5b
Kirk 80824 5b
Kit Carson 80825 5b
Kittredge 80457 5b
Kremmling 80459 5a
La Jara 81140 5b
La Junta 81050 6a
La Salle 80645 5a
La Veta 81055 6a
Lafayette 80026 6a
Lake City 81235 5a
Lake George 80827 5b
Lamar 81052 6a
Laporte 80535 5b
Larkspur 80118 5b
Las Animas 81054 6a
Lazear 81420 6b
Leadville 80461 5a
Lewis 81327 6b
Limon 80826+ 5b
Lindon 80740 5b
Littleton 80120+ 6a
Littleton (Douglas) 80125+ 5b–6a
Littleton (Jefferson) 80123+ 5b–6a
Livermore 80536 5b
Loma 81524 6b
Lone Tree 80124 6a
Longmont 80501+ 5b–6a
Longmont (Weld) 80504 5b
Louisville 80027 6a
Louviers 80131 5b
Loveland 80537+ 5b
Lyons 80540 5b
Mack 81525 7a
Manassa 81141 5a
Mancos 81328 6a
Manitou Springs 80829 5b
Manzanola 81058 6a
Marvel 81329 6a
Masonville 80541 5b
Matheson 80830 5b
Maybell 81640 6a
Mc Clave 81057 6a
Mc Coy 80463 5b
Mead 80542 5b
Meeker 81641 5b
Meredith 81642 5a
Merino 80741 5b
Mesa 81643 6b
Mesa Verde National Park 81330 7a
Milliken 80543 5b
Minturn 81645 5a
Model 81059 6a
Moffat 81143 5b
Molina 81646 5b
Monarch 81227 5b
Monte Vista 81144 5a
Montrose 81401+ 6a–6b
Monument 80132 5b
Morrison 80465 5b
Mosca 81146 5a
Nathrop 81236 5b
Naturita 81422 6b
Nederland 80466 5b
New Castle 81647 6a
New Raymer 80742 5a
Norwood 81423 6a
Nucla 81424 6a
Nunn 80648 5a
Oak Creek 80467 5a
Ohio City 81237 5a
Olathe 81425 6b
Olney Springs 81062 6a
Ophir 81426 5b
Orchard 80649 5a
Ordway 81063 5b
Otis 80743 5b
Ouray 81427 5b
Ovid 80744 5b
Padroni 80745 5b
Pagosa Springs 81147+ 5b
Palisade 81526 7a
Palmer Lake 80133 5b
Paoli 80746 5b
Paonia 81428 6b
Parachute 81635 6a
Paradox 81429 6b
Parker 80134+ 5b
Parlin 81239 4b
Parshall 80468 5a
Peetz 80747 5b
Penrose 81240 6a
Peyton 80831 5b
Phippsburg 80469 5a
Pierce 80650 5b
Pine 80470 5b
Pinecliffe 80471 5b
Pitkin 81241 5a
Placerville 81430 5b
Platteville 80651 5b
Pleasant View 81331 6b
Poncha Springs 81242 6a
Powderhorn 81243 5b
Pritchett 81064 6b
Pueblo 81001+ 5b–6a
Ramah 80832 5b
Rand 80473 4b
Rangely 81648 6a
Red Cliff 81649 5a
Red Feather Lakes 80545 5a
Redvale 81431 6b
Rico 81332 5b
Ridgway 81432 6a
Rifle 81650 6a
Rockvale 81244 6a
Rocky Ford 81067 6a
Roggen 80652 5b
Rollinsville 80474 5b
Romeo 81148 5a
Rush 80833 5b
Rye 81069 6a
Saguache 81149 5b
Salida 81201 5b
San Luis 81152 5b
Sanford 81151 5a
Sargents 81248 5b
Sedalia 80135 5b
Sedgwick 80749 5b
Seibert 80834 5b
Severance 80546 5b
Shawnee 80475 5b
Sheridan Lake 81071 6a
Silt 81652 6a
Silver Plume 80476 5a
Silverthorne 80497+ 4b–5a
Silverton 81433 5a
Simla 80835 5b
Slater 81653 5b
Snowmass 81654 6a
Snowmass Village 81615 5b
Snyder 80750 5b
Somerset 81434 6a
South Fork 81154 5b
Springfield 81073 6b
Steamboat Springs 80477+ 4b–5b
Sterling 80751 5b
Stoneham 80754 5b
Strasburg 80136 5b
Stratton 80836 6a
Sugar City 81076 5b
Swink 81077 6a
Tabernash 80478 5b
Telluride 81435 5b
Thornton 80241 6a
Timnath 80547 5b
Toponas 80479 5a
Towaoc 81334 7a
Trinchera 81081 6a
Trinidad 81082 6a
Twin Lakes 81251 5a
Two Buttes 81084 6b
Usaf Academy 80840+ 5b
Vail 81657+ 5a–5b
Vernon 80755 5b
Victor 80860 5b
Vilas 81087 6b
Villa Grove 81155 5b
Vona 80861 6a
Walden 80480 4b
Walsenburg 81089 6a
Walsh 81090 6b
Ward 80481 5b
Watkins 80137 6a
Weldona 80653 5a
Wellington 80549 5b
Westcliffe 81252 5b
Westminster 80030+ 6a
Weston 81091 6a
Wetmore 81253 6a
Wheat Ridge 80033+ 6a
Whitewater 81527 6a
Wiggins 80654 5a
Wild Horse 80862 6a
Wiley 81092 6a
Windsor 80550+ 5b
Winter Park 80482 5a
Wolcott 81655 6a
Woodland Park 80863+ 5a–5b
Woodrow 80757 5b
Woody Creek 81656 5b
Wray 80758 5b
Yampa 80483 5a
Yellow Jacket 81335 6b
Yoder 80864 6a
Yuma 80759 5b

Other states

Alabama Alaska Arizona Arkansas California Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho 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 Colorado?

Colorado spans zones 4a–7a. Zone 6a is the most common, covering 44% of the state's ZIP codes. Enter your ZIP code above for your exact zone.

What planting zone is Colorado Springs, CO?

Colorado Springs is in USDA zone 5b–6a, depending on the ZIP code. Its average coldest winter night is -15 to -5 °F.

What planting zone is Denver, CO?

Denver is in USDA zone 6a. Its average coldest winter night is -10 to -5 °F.

What planting zone is Aurora, CO?

Aurora is in USDA zone 6a. Its average coldest winter night is -10 to -5 °F.

What is the coldest zone in Colorado?

The coldest part of Colorado is zone 4a, with winter lows of -30 to -25 °F. The warmest is zone 7a, at 0 to 5 °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.

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