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Iowa Planting Zones

Iowa covers USDA hardiness zones 4b to 6a on the 2023 map. The most common zone is 5a (54% of ZIP codes), where the coldest winter night averages -20 to -15 °F. Des Moines is zone 5b, Cedar Rapids is zone 5a–5b and Davenport is zone 5b.

Zones in Iowa

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

4b 2% -25 to -20 °F
5a 54% -20 to -15 °F
5b 42% -15 to -10 °F
6a 3% -10 to -5 °F

Major cities

Des Moines 5b
Cedar Rapids 5a–5b
Davenport 5b
Sioux City 5a
Iowa City 5b
Dubuque 5a
Ames 5b
Clinton 5b
Waterloo 5a
Boone 5a
Council Bluffs 5b–6a
Urbandale 5b

Every city and town in Iowa

Ackley 50601 5a
Ackworth 50001 5b
Adair 50002 5b
Adel 50003 5b
Afton 50830 5b
Agency 52530 5b
Ainsworth 52201 5b
Akron 51001 5a
Albert City 50510 5a
Albia 52531 5b
Albion 50005 5a
Alburnett 52202 5a
Alden 50006 5a
Alexander 50420 5a
Algona 50511 5a
Alleman 50007 5b
Allerton 50008 5b
Allison 50602 5a
Alta 51002 5a
Alta Vista 50603 5a
Alton 51003 5a
Altoona 50009 5b
Alvord 51230 5a
Amana 52203+ 5b
Ames 50010+ 5b
Anamosa 52205 5a
Andover 52701 5a
Andrew 52030 5a
Anita 50020 5b
Ankeny 50021+ 5b
Anthon 51004 5a
Aplington 50604 5a
Arcadia 51430 5a
Archer 51231 5a
Aredale 50605 5a
Argyle 52619 6a
Arion 51520 5b
Arispe 50831 5b
Arlington 50606 4b
Armstrong 50514 5a
Arnolds Park 51331 5a
Arthur 51431 5a
Ashton 51232 5a
Aspinwall 51432 5a
Atalissa 52720 5b
Atkins 52206 5a
Atlantic 50022 5a
Auburn 51433 5a
Audubon 50025 5a
Aurelia 51005 5a
Aurora 50607 5a
Austinville 50608 5a
Avoca 51521 5b
Ayrshire 50515 5a
Badger 50516 5a
Bagley 50026 5a
Baldwin 52207 5a
Bancroft 50517 5a
Barnes City 50027 5b
Barnum 50518 5a
Batavia 52533 5b
Battle Creek 51006 5a
Baxter 50028 5b
Bayard 50029 5a
Beacon 52534 5b
Beaman 50609 5a
Beaver 50031 5a
Bedford 50833 5b
Belle Plaine 52208 5a
Bellevue 52031 5a
Belmond 50421 5a
Bennett 52721 5a
Benton 50835 5b
Bernard 52032 5a
Berwick 50032 5b
Bettendorf 52722 5b
Birmingham 52535 5b
Blairsburg 50034 5a
Blairstown 52209 5a
Blakesburg 52536 5b
Blanchard 51630 5b
Blencoe 51523 5a
Blockton 50836 5b
Bloomfield 52537 5b
Blue Grass 52726 5b
Bode 50519 5a
Bonaparte 52620 6a
Bondurant 50035 5b
Boone 50036+ 5a
Booneville 50038 5b
Bouton 50039 5a
Boxholm 50040 5a
Boyden 51234 5a
Braddyville 51631 5b
Bradgate 50520 5a
Brandon 52210 5a
Brayton 50042 5a
Breda 51436 5a
Bridgewater 50837 5b
Brighton 52540 5b
Bristow 50611 5a
Britt 50423 5a
Bronson 51007 5a
Brooklyn 52211 5a
Brunsville 51008 5a
Bryant 52727 5a
Buckeye 50043 5a
Buckingham 50612 5a
Buffalo 52728 5b
Buffalo Center 50424 5a
Burlington 52601 6a
Burnside 50521 5a
Burt 50522 5a
Bussey 50044 5b
Calamus 52729 5b
Callender 50523 5a
Calmar 52132 5a
Calumet 51009 5a
Camanche 52730 5b
Cambridge 50046 5b
Cantril 52542 6a
Carbon 50839 5b
Carlisle 50047 5b
Carpenter 50426 5a
Carroll 51401 5a
Carson 51525 5b
Carter Lake 51510 6a
Cascade 52033 5a
Casey 50048 5b
Castalia 52133 5a
Castana 51010 5b
Cedar 52543 5b
Cedar Falls 50613 5a
Cedar Rapids 52401+ 5a–5b
Center Junction 52212 5a
Center Point 52213 5a
Centerville 52544 5b
Central City 52214 5a
Chariton 50049 5b
Charles City 50616 5a
Charlotte 52731 5a
Charter Oak 51439 5a
Chelsea 52215 5a
Cherokee 51012 5a
Chester 52134 4b
Chillicothe 52548 5b
Churdan 50050 5a
Cincinnati 52549 5b
Clare 50524 5a
Clarence 52216 5a
Clarinda 51632 5b
Clarion 50525+ 5a
Clarksville 50619 5a
Clear Lake 50428 5a
Clearfield 50840 5b
Cleghorn 51014 5a
Clemons 50051 5a
Clermont 52135 5a
Climbing Hill 51015 5a
Clinton 52732+ 5b
Clio 50052 5b
Clive 50325 5b
Clutier 52217 5a
Coggon 52218 5a
Coin 51636 5b
Colesburg 52035 5a
Colfax 50054 5b
College Springs 51637 5b
Collins 50055 5b
Colo 50056 5a
Columbia 50057 5b
Columbus City 52737 5b
Columbus Junction 52738 5b
Colwell 50620 5a
Conesville 52739 5b
Conrad 50621 5a
Conroy 52220 5a
Coon Rapids 50058 5a
Coralville 52241 5b
Corning 50841 5b
Correctionville 51016 5a
Corwith 50430 5a
Corydon 50060 5b
Coulter 50431 5a
Council Bluffs 51501+ 5b–6a
Crawfordsville 52621 5b
Crescent 51526 5b
Cresco 52136 4b
Creston 50801 5b
Cromwell 50842 5b
Crystal Lake 50432 5a
Cumberland 50843 5b
Cumming 50061 5b
Curlew 50527 5a
Cushing 51018 5a
Cylinder 50528 5a
Dakota City 50529 5a
Dallas Center 50063 5b
Dana 50064 5a
Danbury 51019 5a
Danville 52623 6a
Davenport 52801+ 5b
Davis City 50065 5b
Dawson 50066 5a
Dayton 50530 5a
De Soto 50069 5b
De Witt 52742 5b
Decatur 50067 5b
Decorah 52101 5a
Dedham 51440 5a
Deep River 52222 5b
Defiance 51527 5a
Delaware 52036 4b
Delhi 52223 5a
Delmar 52037 5a
Deloit 51441 5a
Delta 52550 5b
Denison 51442 5a
Denmark 52624 6a
Denver 50622 5a
Derby 50068 5b
Des Moines 50301+ 5b
Dewar 50623 5a
Dexter 50070 5b
Diagonal 50845 5b
Dickens 51333 5a
Dike 50624 5a
Dixon 52745 5b
Dolliver 50531 5a
Donahue 52746 5b
Donnellson 52625 6a
Doon 51235 5a
Dorchester 52140 5a
Douds 52551 5b
Dougherty 50433 5a
Dow City 51528 5a
Dows 50071 5a
Drakesville 52552 5b
Dubuque 52001+ 5a
Dumont 50625 5a
Duncombe 50532 5a
Dundee 52038 5a
Dunkerton 50626 5a
Dunlap 51529 5b
Durango 52039 5a
Durant 52747 5b
Dyersville 52040 5a
Dysart 52224 5a
Eagle Grove 50533 5a
Earlham 50072 5b
Earling 51530 5b
Earlville 52041 5a
Early 50535 5a
Eddyville 52553 5b
Edgewood 52042 4b
Elberon 52225 5a
Eldon 52554 5b
Eldora 50627 5a
Eldridge 52748 5b
Elgin 52141 5a
Elk Horn 51531 5a
Elkader 52043 4b
Elkhart 50073 5b
Elkport 52044 4b
Elliott 51532 5b
Ellston 50074 5b
Ellsworth 50075 5a
Elma 50628 4b
Ely 52227 5a
Emerson 51533 5b
Emmetsburg 50536 5a
Epworth 52045 5a
Essex 51638 5b
Estherville 51334 5a
Evansdale 50707 5a
Everly 51338 5a
Exira 50076 5a
Exline 52555 5b
Fairbank 50629 5a
Fairfax 52228 5a
Fairfield 52556+ 5b
Farley 52046 5a
Farmersburg 52047 5a
Farmington 52626 6a
Farnhamville 50538 5a
Farragut 51639 5b
Fayette 52142 5a
Fenton 50539 5a
Ferguson 50078 5a
Fertile 50434 5a
Floris 52560 5b
Floyd 50435 5a
Fonda 50540 5a
Fontanelle 50846 5b
Forest City 50436 5a
Fort Atkinson 52144 5a
Fort Dodge 50501 5a
Fort Madison 52627 6a
Fostoria 51340 5a
Fredericksburg 50630 5a
Frederika 50631 5a
Fremont 52561 5b
Fruitland 52749 5b
Galt 50101 5a
Galva 51020 5a
Garber 52048 5a
Garden City 50102 5a
Garden Grove 50103 5b
Garnavillo 52049 5a
Garner 50438 5a
Garrison 52229 5a
Garwin 50632 5a
Geneva 50633 5a
George 51237 5a
Gibson 50104 5b
Gilbert 50105 5b
Gilbertville 50634 5a
Gillett Grove 51341 5a
Gilman 50106 5a
Gilmore City 50541 5a
Gladbrook 50635 5a
Glenwood 51534 6a
Glidden 51443 5a
Goldfield 50542 5a
Goodell 50439 5a
Goose Lake 52750 5a
Gowrie 50543 5a
Graettinger 51342 5a
Grafton 50440 5a
Grand Junction 50107 5a
Grand Mound 52751 5a
Grand River 50108 5b
Grandview 52752 5b
Granger 50109 5b
Grant 50847 5b
Granville 51022 5a
Gravity 50848 5b
Gray 50110 5a
Greeley 52050 4b
Greene 50636 5a
Greenfield 50849 5b
Greenville 51343 5a
Grimes 50111 5b
Grinnell 50112 5b
Griswold 51535 5b
Grundy Center 50638 5a
Guernsey 52221 5b
Guthrie Center 50115 5a
Guttenberg 52052 5a
Halbur 51444 5a
Hamburg 51640 5b
Hamilton 50116 5b
Hamlin 50117 5a
Hampton 50441 5a
Hancock 51536 5b
Hanlontown 50444 5a
Harcourt 50544 5a
Hardy 50545 5a
Harlan 51537 5b
Harlan (Pottawattamie) 51593 5b
Harper 52231 5b
Harpers Ferry 52146 5a
Harris 51345 5a
Hartford 50118 5b
Hartley 51346 5a
Hartwick 52232 5a
Harvey 50119 5b
Hastings 51540 5b
Havelock 50546 5a
Haverhill 50120 5a
Hawarden 51023 5a
Hawkeye 52147 5a
Hayesville 52562 5b
Hazleton 50641 5a
Hedrick 52563 5b
Henderson 51541 5b
Hiawatha 52233 5a
Highlandville 52149 5a
Hills 52235 5b
Hillsboro 52630 6a
Hinton 51024 5a
Holland 50642 5a
Holstein 51025 5a
Holy Cross 52053 5a
Homestead 52236 5b
Honey Creek 51542 5b
Hopkinton 52237 5a
Hornick 51026 5a
Hospers 51238 5a
Houghton 52631 6a
Hubbard 50122 5a
Hudson 50643 5a
Hull 51239 5a
Humboldt 50548 5a
Humeston 50123 5b
Huxley 50124 5b
Ida Grove 51445 5a
Imogene 51645 5b
Independence 50644 5a
Indianola 50125 5b
Inwood 51240 5a
Ionia 50645 5a
Iowa City 52240+ 5b
Iowa Falls 50126 5a
Ira 50127 5b
Ireton 51027 5a
Irwin 51446 5a
Jamaica 50128 5a
Janesville 50647 5a
Jefferson 50129 5b
Jesup 50648 5a
Jewell 50130 5a
Johnston 50131 5b
Joice 50446 5a
Jolley 50551 5a
Kalona 52247 5b
Kamrar 50132 5a
Kanawha 50447 5a
Kellerton 50133 5b
Kelley 50134 5b
Kellogg 50135 5b
Kensett 50448 5a
Keokuk 52632 6a
Keosauqua 52565 5b
Keota 52248 5b
Keswick 50136 5b
Keystone 52249 5a
Killduff 50137 5b
Kimballton 51543 5b
Kingsley 51028 5a
Kirkman 51447 5a
Kirkville 52566 5b
Kiron 51448 5a
Klemme 50449 5a
Knierim 50552 5a
Knoxville 50138 5b
La Motte 52054 5a
La Porte City 50651 5a
Lacona 50139 5b
Ladora 52251 5a
Lake City 51449 5a
Lake Mills 50450 5a
Lake Park 51347 5a
Lake View 51450 5a
Lakota 50451 5a
Lamoni 50140 5b
Lamont 50650 5a
Lanesboro 51451 5a
Langworthy 52252 5a
Lansing 52151 5a
Larchwood 51241 5a
Larrabee 51029 5a
Latimer 50452 5a
Laurel 50141 5b
Laurens 50554 5a
Lawler 52154 5a
Lawton 51030 5a
Le Claire 52753 5b
Le Grand 50142 5a
Le Mars 51031 5a
Ledyard 50556 5a
Lehigh 50557 5a
Leighton 50143 5b
Leland 50453 5a
Lenox 50851 5b
Leon 50144 5b
Lester 51242 5a
Letts 52754 5b
Lewis 51544 5b
Liberty Center 50145 5b
Libertyville 52567 5b
Lidderdale 51452 5a
Lime Springs 52155 4b
Lincoln 50652 5a
Linden 50146 5a
Lineville 50147 5b
Linn Grove 51033 5a
Lisbon 52253 5a
Liscomb 50148 5a
Little Cedar 50454 5a
Little Rock 51243 5a
Little Sioux 51545 5a
Livermore 50558 5a
Lockridge 52635 5b
Logan 51546 5b
Lohrville 51453 5a
Lone Rock 50559 5a
Lone Tree 52755 5b
Long Grove 52756 5b
Lorimor 50149 5b
Lost Nation 52254 5a
Lovilia 50150 5b
Low Moor 52757 5b
Lowden 52255 5a
Lu Verne 50560 5a
Luana 52156 5a
Lucas 50151 5b
Luther 50152 5a
Luxemburg 52056 5a
Luzerne 52257 5a
Lynnville 50153 5b
Lytton 50561 5a
Macedonia 51549 5b
Macksburg 50155 5b
Madrid 50156 5b
Magnolia 51550 5b
Malcom 50157 5a
Mallard 50562 5a
Malvern 51551 5b
Manchester 52057 5a
Manilla 51454 5a
Manly 50456 5a
Manning 51455 5a
Manson 50563 5a
Mapleton 51034 5a
Maquoketa 52060 5a
Marathon 50565 5a
Marble Rock 50653 5a
Marcus 51035 5a
Marengo 52301 5a
Marion 52302 5a
Marne 51552 5b
Marquette 52158 5a
Marshalltown 50158 5a
Martelle 52305 5a
Martensdale 50160 5b
Martinsburg 52568 5b
Mason City 50401+ 5a
Masonville 50654 5a
Massena 50853 5b
Matlock 51244 5a
Maurice 51036 5a
Maxwell 50161 5b
Maynard 50655 5a
Mc Callsburg 50154 5a
Mc Causland 52758 5b
Mc Clelland 51548 5b
Mc Gregor 52157 5a
Mc Intire 50455 5a
Mechanicsville 52306 5a
Mediapolis 52637 5b
Melbourne 50162 5b
Melcher Dallas 50062+ 5b
Melrose 52569 5b
Melvin 51350 5a
Menlo 50164 5b
Meriden 51037 5a
Merrill 51038 5a
Meservey 50457 5a
Middle Amana 52307 5b
Middletown 52638 6a
Miles 52064 5a
Milford 51351 5a
Millersburg 52308 5b
Millerton 50165 5b
Milo 50166 5b
Milton 52570 5b
Minburn 50167 5a
Minden 51553 5b
Mineola 51554 5b
Mingo 50168 5b
Missouri Valley 51555 5b
Mitchellville 50169 5b
Modale 51556 5b
Mondamin 51557 5b
Monmouth 52309 5a
Monona 52159 5a
Monroe 50170 5b
Montezuma 50171 5b
Monticello 52310 5a
Montour 50173 5a
Montpelier 52759 5b
Montrose 52639 6a
Moorhead 51558 5b
Moorland 50566 5a
Moravia 52571 5b
Morning Sun 52640 5b
Morrison 50657 5a
Moscow 52760 5b
Moulton 52572 5b
Mount Auburn 52313 5a
Mount Ayr 50854 5b
Mount Pleasant 52641 5b
Mount Sterling 52573 6a
Mount Union 52644 5b
Mount Vernon 52314 5a
Moville 51039 5a
Murray 50174 5b
Muscatine 52761 5b
Mystic 52574 5b
Nashua 50658 5a
Nemaha 50567 5a
Neola 51559 5b
Nevada 50201 5b
New Albin 52160 5a
New Hampton 50659 5a
New Hartford 50660 5a
New Liberty 52765 5b
New London 52645 5b
New Market 51646 5b
New Providence 50206 5a
New Sharon 50207 5b
New Vienna 52065 5a
New Virginia 50210 5b
Newell 50568 5a
Newhall 52315 5a
Newton 50208 5b
Nichols 52766 5b
Nodaway 50857 5b
Nora Springs 50458 5a
North Buena Vista 52066 5a
North English 52316 5b
North Liberty 52317 5b
North Washington 50661 5a
Northboro 51647 5b
Northwood 50459 5a
Norwalk 50211 5b
Norway 52318 5a
Oakland 51560 5b
Oakville 52646 5b
Ocheyedan 51354 5a
Odebolt 51458 5a
Oelwein 50662 5a
Ogden 50212 5a
Okoboji 51355 5a
Olds 52647 5b
Olin 52320 5a
Ollie 52576 5b
Onawa 51040 5a
Onslow 52321 5a
Oran 50664 5a
Orange City 51041 5a
Orchard 50460 5a
Orient 50858 5b
Osage 50461 5a
Osceola 50213 5b
Oskaloosa 52577 5b
Ossian 52161 5a
Otho 50569 5a
Otley 50214 5b
Oto 51044 5a
Ottosen 50570 5a
Ottumwa 52501 5b
Oxford 52322 5b
Oxford Junction 52323 5a
Pacific Junction 51561 5b
Packwood 52580 5b
Palmer 50571 5a
Palo 52324 5a
Panama 51562 5b
Panora 50216 5a
Parkersburg 50665 5a
Parnell 52325 5b
Paton 50217 5a
Patterson 50218 5b
Paullina 51046 5a
Pella 50219 5b
Peosta 52068 5a
Percival 51648 5b
Perry 50220 5a
Persia 51563 5b
Peru 50222 5b
Peterson 51047 5a
Pierson 51048 5a
Pilot Grove 52648 6a
Pilot Mound 50223 5a
Pisgah 51564 5b
Plainfield 50666 5a
Plano 52581 5b
Pleasant Hill 50327 5b
Pleasant Valley 52767 5b
Pleasantville 50225 5b
Plover 50573 5a
Plymouth 50464 5a
Pocahontas 50574 5a
Polk City 50226 5b
Pomeroy 50575 5a
Popejoy 50227 5a
Portsmouth 51565 5b
Postville 52162 5a
Prairie City 50228 5b
Prairieburg 52219 5a
Prescott 50859 5b
Preston 52069 5a
Primghar 51245 5a
Princeton 52768 5b
Prole 50229 5b
Promise City 52583 5b
Protivin 52163 4b
Pulaski 52584 5b
Quasqueton 52326 5a
Quimby 51049 5a
Radcliffe 50230 5a
Rake 50465 5a
Ralston 51459 5a
Randalia 52164 5a
Randall 50231 5a
Randolph 51649 5b
Raymond 50667 5a
Readlyn 50668 5a
Reasnor 50232 5b
Red Oak 51566+ 5b
Redding 50860 5b
Redfield 50233 5a
Reinbeck 50669 5a
Rembrandt 50576 5a
Remsen 51050 5a
Renwick 50577 5a
Rhodes 50234 5b
Riceville 50466 4b
Richland 52585 5b
Ricketts 51460 5a
Ridgeway 52165 4b
Ringsted 50578 5a
Rippey 50235 5a
Riverside 52327 5b
Riverton 51650 5b
Robins 52328 5a
Rock Falls 50467 5a
Rock Rapids 51246 5a
Rock Valley 51247 5a
Rockford 50468 5a
Rockwell 50469 5a
Rockwell City 50579 5a
Rodney 51051 5a
Roland 50236 5a
Rolfe 50581 5a
Rome 52642 5b
Rose Hill 52586 5b
Rowan 50470 5a
Rowley 52329 5a
Royal 51357 5a
Rudd 50471 5a
Runnells 50237 5b
Russell 50238 5b
Ruthven 51358 5a
Rutland 50582 5a
Ryan 52330 5a
Sabula 52070 5a
Sac City 50583 5a
Saint Ansgar 50472 5a
Saint Anthony 50239 5a
Saint Charles 50240 5b
Saint Donatus 52071 5a
Saint Lucas 52166 5a
Saint Marys 50241 5b
Saint Olaf 52072 5a
Saint Paul 52657 6a
Salem 52649 6a
Salix 51052 5a
Sanborn 51248 5a
Scarville 50473 5a
Schaller 51053 5a
Schleswig 51461 5a
Scranton 51462 5a
Searsboro 50242 5b
Selma 52588 5b
Sergeant Bluff 51054 5a
Seymour 52590 5b
Shambaugh 51651 5b
Shannon City 50861 5b
Sharpsburg 50862 5b
Sheffield 50475 5a
Shelby 51570 5b
Sheldahl 50243 5b
Sheldon 51201 5a
Shell Rock 50670 5a
Shellsburg 52332 5a
Shenandoah 51601+ 5b
Sherrill 52073 5a
Sibley 51249 4b
Sidney 51652 5b
Sigourney 52591 5b
Silver City 51571 6a
Sioux Center 51250 5a
Sioux City 51101+ 5a
Sioux Rapids 50585 5a
Slater 50244 5b
Sloan 51055 5a
Smithland 51056 5a
Soldier 51572 5b
Solon 52333 5b
Somers 50586 5a
South Amana 52334 5a
South English 52335 5b
Spencer 51301 5a
Sperry 52650 6a
Spillville 52168 4b
Spirit Lake 51360 5a
Spragueville 52074 5a
Springbrook 52075 5a
Springville 52336 5a
Stacyville 50476 5a
Stanhope 50246 5a
Stanley 50671 5a
Stanton 51573 5b
Stanwood 52337 5a
State Center 50247 5a
Steamboat Rock 50672 5a
Stockport 52651 6a
Stockton 52769 5b
Storm Lake 50588 5a
Story City 50248 5a
Stout 50673 5a
Stratford 50249 5a
Strawberry Point 52076 4b
Stuart 50250 5b
Sully 50251 5b
Sumner 50674 5a
Superior 51363 5a
Sutherland 51058 5a
Swaledale 50477 5a
Swan 50252 5b
Swea City 50590 5a
Swedesburg 52652 5b
Swisher 52338 5a
Tabor 51653 6a
Tama 52339 5a
Teeds Grove 52771 5a
Templeton 51463 5a
Terril 51364 5a
Thayer 50254 5b
Thompson 50478 5a
Thor 50591 5a
Thornburg 50255 5b
Thornton 50479 5a
Thurman 51654 5b
Tiffin 52340 5b
Tingley 50863 5b
Tipton 52772 5a
Titonka 50480 5a
Toddville 52341 5a
Toledo 52342 5a
Tracy 50256 5b
Traer 50675 5a
Treynor 51575 5b
Tripoli 50676 5a
Troy Mills 52344 5a
Truesdale 50592 5a
Truro 50257 5b
Udell 52593 5b
Underwood 51576 5b
Union 50258 5a
Unionville 52594 5b
University Park 52595 5b
Urbana 52345 5a
Urbandale 50322+ 5b
Ute 51060 5a
Vail 51465 5a
Van Horne 52346 5a
Van Meter 50261 5b
Van Wert 50262 5b
Varina 50593 5a
Ventura 50482 5a
Victor 52347 5a
Villisca 50864 5b
Vincent 50594 5a
Vining 52348 5a
Vinton 52349 5a
Volga 52077 4b
Wadena 52169 5a
Walcott 52773 5b
Walford 52351 5a
Walker 52352 5a
Wall Lake 51466 5a
Wallingford 51365 5a
Walnut 51577 5a
Wapello 52653 5b
Washington 52353 5b
Washta 51061 5a
Waterloo 50701+ 5a
Waterville 52170 5a
Watkins 52354 5a
Waucoma 52171 5a
Waukee 50263 5b
Waukon 52172 5a
Waverly 50677 5a
Wayland 52654 5b
Webb 51366 5a
Webster 52355 5b
Webster City 50595 5a
Weldon 50264 5b
Wellman 52356 5b
Wellsburg 50680 5a
Welton 52774 5b
Wesley 50483 5a
West Bend 50597 5a
West Branch 52358 5b
West Burlington 52655 6a
West Chester 52359 5b
West Des Moines 50265+ 5b
West Liberty 52776 5b
West Point 52656 6a
West Union 52175 5a
Westfield 51062 5a
Westgate 50681 5a
Westside 51467 5a
Wever 52658 6a
What Cheer 50268 5b
Wheatland 52777 5a
Whiting 51063 5a
Whittemore 50598 5a
Whitten 50269 5a
Williams 50271 5a
Williamsburg 52361 5b
Williamson 50272 5b
Wilton 52778 5b
Windsor Heights 50324 5b
Winfield 52659 5b
Winterset 50273 5b
Winthrop 50682 5a
Wiota 50274 5b
Woden 50484 5a
Woodbine 51579 5b
Woodburn 50275 5b
Woodward 50276 5a
Woolstock 50599 5a
Worthington 52078 5a
Wyoming 52362 5a
Yale 50277 5a
Yarmouth 52660 5b
Yorktown 51656 5b
Zearing 50278 5a
Zwingle 52079 5a

Other states

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

Iowa spans zones 4b–6a. Zone 5a is the most common, covering 54% of the state's ZIP codes. Enter your ZIP code above for your exact zone.

What planting zone is Des Moines, IA?

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

What planting zone is Cedar Rapids, IA?

Cedar Rapids is in USDA zone 5a–5b, depending on the ZIP code. Its average coldest winter night is -20 to -10 °F.

What planting zone is Davenport, IA?

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

What is the coldest zone in Iowa?

The coldest part of Iowa is zone 4b, with winter lows of -25 to -20 °F. The warmest is zone 6a, at -10 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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