Alaska · zones 3a–8a
When to plant zucchini in Alaska.
Sow between May 19 to Sep 1 in a typical year, keyed to Alaska's median last frost around May 12. A second, fall sowing fits Jun 1 to Jun 20. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Zucchini dates for a typical Alaska season.
Direct sow
May 19 to Sep 1
Keyed to the ~May 12 last frost. Sow 1" deep, 24" apart.
Fall round
Jun 1 to Jun 20
Counted back from the ~Sep 15 first frost.
Harvest
~50 days later
~8 lb per plant over ~5 weeks.
Alaska spans more than one climate: Zone 3 is the most common zone, but the state runs 3a to 8a. That's why the planner works from your ZIP code's frost dates, not your zone — mountain and coastal gardens in the same state can be three weeks apart.