Massachusetts · zones 5a–7a
When to plant zucchini in Massachusetts.
Sow between Apr 29 to Aug 12 in a typical year, keyed to Massachusetts's median last frost around Apr 22. A second, fall sowing fits Jul 6 to Jul 25. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Zucchini dates for a typical Massachusetts season.
Direct sow
Apr 29 to Aug 12
Keyed to the ~Apr 22 last frost. Sow 1" deep, 24" apart.
Fall round
Jul 6 to Jul 25
Counted back from the ~Oct 20 first frost.
Harvest
~50 days later
~8 lb per plant over ~5 weeks.
Massachusetts spans more than one climate: Zone 6 is the most common zone, but the state runs 5a to 7a. 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.