When to plant Onions in Alaska
In spring, from Apr 1 – May 1 in Juneau to Apr 20 – May 15 in Wasilla.
In fall, May 1 – June 10 in Fairbanks.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Anchorage | Apr 20 – May 15 | Spring-planted |
| Fairbanks | Apr 20 – May 15 | May 1 – June 10 |
| Juneau | Apr 1 – May 1 | Spring-planted |
| Wasilla | Apr 20 – May 15 | Spring-planted |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for onion plants.