Wyoming · zones 4a–5a
When to plant zucchini in Wyoming.
Sow between Jun 4 to Jul 15 in a typical year, keyed to Wyoming's median last frost around May 28. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Zucchini dates for a typical Wyoming season.
Direct sow
Jun 4 to Jul 15
Keyed to the ~May 28 last frost. Sow 1" deep, 24" apart.
Harvest
~50 days later
~8 lb per plant over ~5 weeks.
Wyoming spans more than one climate: Zone 5 is the most common zone, but the state runs 4a to 5a. 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.
In Wyoming: watch for
The pests that find zucchini here.
The short season here, about 112 frost-free days, keeps squash, summer in front of squash bugs only briefly. One early row cover usually carries a planting through the worst of it.
Gray shield bugs; leaves wilt and get crispy patches.
Organic fix: Lay a board out overnight and collect them at dawn; scrape bronze egg clusters off leaf undersides.
Sudden wilt with sawdust-like frass at the stem base.
Organic fix: Cover young plants; slit the stem to remove the grub, or inject Bt.
Yellow striped or spotted beetles chewing leaves and blossoms.
Organic fix: Row cover until the first female flowers open, then hand-pick.
White powder coating the leaves late in the season.
Organic fix: Space for airflow, water the soil rather than the leaves, use resistant varieties.
Your season math: Wyoming gives zucchini about 112 frost-free days, and it needs roughly 50 days to a first harvest. That fits about 3 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting zucchini in Wyoming: questions
When should I plant zucchini in Wyoming?+
In a typical Wyoming year, sow zucchini between Jun 4 to Jul 15, keyed to the state's median last frost around May 28. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Wyoming?+
Wyoming spans zones 4a–5a, mostly zone 5. But frost dates, not zones, set planting time. The free planner uses your ZIP code's actual frost dates.
How many zucchini plants do I need?+
Depends who you're feeding. The crop page has exact counts per household size, or the free planner does the math for your family in about 60 seconds.