USDA hardiness zone
Zone 2a
Rolled up from the 27 ZIP codes in our data that are classified zone 2a, covering 0 nurseries and garden centers across 0 cities we track in this zone.
Average minimum winter temperature
-50°F
Last spring frost range
May 13–Jun 10
First fall frost range
Aug 27–Sep 24
Average frost-free growing season
107 days
Average monthly temperature
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| -4.2° | 3.9° | 11.2° | 30.4° | 46.1° | 56.8° | 59.5° | 54.4° | 43.9° | 26.2° | 6.9° | -0.8° |
NOAA 1991–2020 Climate Normals, averaged across this zone's member ZIPs.
Crops by frost hardiness
What grows here, and when
This zone's own last-frost dates range across May 13–Jun 10. Hardy and semi-hardy crops can go in before that date; tender and very-tender crops need to wait until after it. See each crop's own guide for exact windows at a specific location in this zone.
Planting windows and crop timing here are computed from USDA/NOAA climate data and the university extension sources cited below, not a site visit or soil test. Treat this as a starting point: local conditions vary, and a local nursery or extension office can advise on your exact site. See our full Disclaimer.
Hardy (49)
- Apple (bare-root fruit tree)
- Apricot (bare-root fruit tree)
- Asparagus
- Bachelor's Button (Cornflower)
- Bare-root rose
- Blackberry
- Blueberry
- Broccoli
- Brussels Sprouts
- Cabbage
- Calendula
- Catnip/Catmint
- Cherry (sweet/tart, bare-root fruit tree)
- Chives
- Collards
- Currant
- Deciduous shade tree (generic, e.g. maple/oak, bare-root or B&B)
- Elderberry
- Evergreen shrub (B&B/potted, e.g. arborvitae, boxwood)
- Flowering deciduous shrub (generic, e.g. lilac/forsythia)
- Garden Peas
- Garlic
- Gooseberry
- Kale
- Kohlrabi
- Larkspur
- Lavender
- Lettuce
- Mint
- Onion (bulb)
- Oregano
- Peach (bare-root fruit tree)
- Pear (bare-root fruit tree)
- Plum (bare-root fruit tree)
- Radish
- Raspberry
- Rhubarb
- Rutabaga
- Sage
- Snapdragon
- Snow Peas
- Spinach
- Strawberry
- Sweet Alyssum
- Sweet Pea
- Table/Bunch Grape
- Tarragon
- Thyme
- Turnip
Semi-hardy (16)
Tender (20)
Zone 2a means an average annual extreme minimum winter temperature of -50°F to -45°F on the 2023 USDA Plant Hardiness Zone Map (USDA/ARS with the PRISM Climate Group at Oregon State University, 1991-2020 records). USDA does not publish an official ZIP list for that map; every ZIP in this rollup carries its zone matched by centroid, not by the map's own polygon boundary, via phzmapi.org's ZIP-level derivation.
The frost and season figures above describe real variation across this zone's own ZIPs. A short growing season like this one rules out most of this directory's warm-season crops entirely rather than just shifting their dates; check the crops-by-hardiness list above for what actually has a shot here, and enter your own ZIP on any crop guide for the exact math rather than trusting this zone's median.
We hold zero nurseries with a ZIP in zone 2a today. Every ZIP here sits in Alaska.
Nearby zones
All zones
USDA 2023 Plant Hardiness Zone Map (zone boundaries, via the phzmapi.org ZIP-level derivation) and NOAA 1991–2020 Climate Normals (frost dates, growing season, monthly temperatures).