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Alaska Planting Zones
Alaska covers USDA hardiness zones 1a to 8b on the 2023 map. The most common zone is 5a (12% of ZIP codes), where the coldest winter night averages -20 to -15 °F. Anchorage is zone 2a–6b, Fairbanks is zone 2a–3b and Juneau is zone 6a–7a.
Zones in Alaska
Share of the state’s ZIP codes in each zone.
Major cities
- Anchorage 2a–6b
- Fairbanks 2a–3b
- Juneau 6a–7a
- Wasilla 4b–5a
- Kodiak 7a–7b
- Jber 5a
- Adak 8b
- Akiachak 3b
- Akiak 3b
- Akutan 8a
- Alakanuk 4a
- Aleknagik 4b
Every city and town in Alaska
- Adak 99546 8b
- Akiachak 99551 3b
- Akiak 99552 3b
- Akutan 99553 8a
- Alakanuk 99554 4a
- Aleknagik 99555 4b
- Allakaket 99720 1a
- Ambler 99786 2a
- Anaktuvuk Pass 99721 2b
- Anchor Point 99556 6a
- Anchorage 99501+ 2a–6b
- Anderson 99744 2a
- Angoon 99820 7a
- Aniak 99557 3a
- Anvik 99558 3b
- Arctic Village 99722 1b
- Atka 99547 8b
- Atqasuk 99791 2a
- Auke Bay 99821 7a
- Barrow 99723 2b
- Beaver 99724 1a
- Bethel 99559 4a
- Bettles Field 99726 1b
- Big Lake 99652 4a
- Brevig Mission 99785 3a
- Buckland 99727 2b
- Cantwell 99729 4a
- Central 99730 3b
- Chalkyitsik 99788 1a
- Chefornak 99561 4a
- Chevak 99563 4a
- Chicken 99732 1b
- Chignik 99564 6b
- Chignik Lagoon 99565 6a
- Chignik Lake 99548 6b
- Chitina 99566 4b
- Chugiak 99567 5a
- Circle 99733 1a
- Clam Gulch 99568 5a
- Clarks Point 99569 4b
- Clear 99704 2a
- Coffman Cove 99918 8a
- Cold Bay 99571 7a
- Cooper Landing 99572 5a
- Copper Center 99573 4b
- Cordova 99574 5a
- Craig 99921 7b
- Crooked Creek 99575 3a
- Deering 99736 3a
- Delta Junction 99737 3a
- Denali National Park 99755 3b
- Dillingham 99576 4a
- Douglas 99824 7a
- Dutch Harbor 99692 8b
- Eagle 99738 2b
- Eagle River 99577 5a
- Eek 99578 4a
- Egegik 99579 5a
- Eielson Afb 99702 2a
- Ekwok 99580 4b
- Elfin Cove 99825 7a
- Elim 99739 3b
- Emmonak 99581 4a
- Ester 99725 3b
- Fairbanks 99701+ 2a–3b
- False Pass 99583 7a
- Fort Greely 99731 2a
- Fort Wainwright 99703 2a
- Fort Yukon 99740 3a
- Gakona 99586 2b
- Galena 99741 1b
- Gambell 99742 4b
- Girdwood 99587 5b
- Glennallen 99588 2b
- Goodnews Bay 99589 4b
- Grayling 99590 3a
- Gustavus 99826 7a
- Haines 99827 5b
- Healy 99743 2a
- Holy Cross 99602 3a
- Homer 99603 6a
- Hoonah 99829 7a
- Hooper Bay 99604 4b
- Hope 99605 5b
- Houston 99694 4a
- Hughes 99745 1b
- Huslia 99746 2a
- Hydaburg 99922 8a
- Hyder 99923 6b
- Iliamna 99606 4b
- Indian 99540 5b
- Jber 99505+ 5a
- Juneau 99801+ 6a–7a
- Kake 99830 7b
- Kaktovik 99747 3a
- Kalskag 99607 3b
- Kaltag 99748 2a
- Karluk 99608 7a
- Kasigluk 99609 4a
- Kasilof 99610 4b
- Kenai 99611 5a
- Ketchikan 99901 7b
- Kiana 99749 2a
- King Cove 99612 7a
- King Salmon 99613 4a
- Kipnuk 99614 4a
- Kivalina 99750 3a
- Klawock 99925 7b
- Kobuk 99751 1b
- Kodiak 99615+ 7a–7b
- Kongiganak 99545 4a
- Kotlik 99620 4a
- Kotzebue 99752 2b
- Koyuk 99753 3b
- Koyukuk 99754 2a
- Kwethluk 99621 4a
- Kwigillingok 99622 4a
- Lake Minchumina 99757 2b
- Larsen Bay 99624 7b
- Levelock 99625 4b
- Lower Kalskag 99626 3b
- Manley Hot Springs 99756 1b
- Manokotak 99628 4b
- Marshall 99585 3b
- Mc Grath 99627 2b
- Mekoryuk 99630 5a
- Metlakatla 99926 8a
- Meyers Chuck 99903 7b
- Minto 99758 2a
- Moose Pass 99631 5a
- Mountain Village 99632 4a
- Naknek 99633 4b
- Napakiak 99634 4a
- Nenana 99760 2a
- New Stuyahok 99636 4b
- Nightmute 99690 4a
- Nikiski 99635 4b
- Nikolai 99691 2b
- Nikolski 99638 8b
- Ninilchik 99639 5b
- Noatak 99761 2a
- Nome 99762 3b
- Nondalton 99640 4a
- Noorvik 99763 2b
- North Pole 99705 2a
- Northway 99764 2a
- Nuiqsut 99789 2a
- Nulato 99765 2a
- Nunam Iqua 99666 4a
- Nunapitchuk 99641 4a
- Old Harbor 99643 7b
- Ouzinkie 99644 7b
- Palmer 99645 5a
- Pedro Bay 99647 4b
- Pelican 99832 7a
- Perryville 99648 6b
- Petersburg 99833 7b
- Pilot Point 99649 5a
- Pilot Station 99650 4a
- Platinum 99651 4b
- Point Baker 99927 8a
- Point Hope 99766 3a
- Point Lay 99759 2b
- Port Alexander 99836 8a
- Port Alsworth 99653 4a
- Port Heiden 99549 5b
- Port Lions 99550 7a
- Prudhoe Bay 99734 2a
- Quinhagak 99655 4b
- Rampart 99767 1b
- Red Devil 99656 3a
- Ruby 99768 3a
- Russian Mission 99657 3b
- Saint George Island 99591 7a
- Saint Marys 99658 4a
- Saint Michael 99659 3b
- Saint Paul Island 99660 6b
- Salcha 99714 3b
- Sand Point 99661 7b
- Savoonga 99769 4a
- Scammon Bay 99662 4b
- Selawik 99770 2a
- Seldovia 99663 6b
- Seward 99664 5b
- Shageluk 99665 3a
- Shaktoolik 99771 3b
- Shishmaref 99772 3a
- Shungnak 99773 1b
- Sitka 99835 7b
- Skagway 99840 5a
- Skwentna 99667 4b
- Sleetmute 99668 2b
- Soldotna 99669 4b
- South Naknek 99670 4b
- Stebbins 99671 3b
- Sterling 99672 4b
- Stevens Village 99774 1a
- Sutton 99674 4b
- Takotna 99675 2a
- Talkeetna 99676 4b
- Tanacross 99776 1b
- Tanana 99777 1b
- Tatitlek 99677 8a
- Teller 99778 3a
- Tenakee Springs 99841 7a
- Thorne Bay 99919 7b
- Togiak 99678 4b
- Tok 99780 2a
- Toksook Bay 99637 4a
- Trapper Creek 99683 4b
- Tuluksak 99679 3b
- Tuntutuliak 99680 4a
- Tununak 99681 4a
- Two Rivers 99716 2a
- Tyonek 99682 5a
- Unalakleet 99684 3b
- Unalaska 99685 8a
- Valdez 99686 5a
- Venetie 99781 2b
- Wainwright 99782 2b
- Wales 99783 3b
- Ward Cove 99928 8a
- Wasilla 99623+ 4b–5a
- White Mountain 99784 4a
- Whittier 99693 7a
- Willow 99688 3b
- Wrangell 99929 7b
- Yakutat 99689 6b
Other states
Alabama Arizona Arkansas California Colorado 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 Alaska?
Alaska spans zones 1a–8b. Zone 5a is the most common, covering 12% of the state's ZIP codes. Enter your ZIP code above for your exact zone.
What planting zone is Anchorage, AK?
Anchorage is in USDA zone 2a–6b, depending on the ZIP code. Its average coldest winter night is -50 to 0 °F.
What planting zone is Fairbanks, AK?
Fairbanks is in USDA zone 2a–3b, depending on the ZIP code. Its average coldest winter night is -50 to -30 °F.
What planting zone is Juneau, AK?
Juneau is in USDA zone 6a–7a, depending on the ZIP code. Its average coldest winter night is -10 to 5 °F.
What is the coldest zone in Alaska?
The coldest part of Alaska is zone 1a, with winter lows of -60 to -55 °F. The warmest is zone 8b, at 15 to 20 °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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