Delaware · zones 7b–7b
When to plant zucchini in Delaware.
Sow between Apr 19 to Aug 2 in a typical year, keyed to Delaware's median last frost around Apr 12. Dates below are state medians; your ZIP code shifts them by days to weeks.
The 2026 windows
Zucchini dates for a typical Delaware season.
Direct sow
Apr 19 to Aug 2
Keyed to the ~Apr 12 last frost. Sow 1" deep, 24" apart.
Harvest
~50 days later
~8 lb per plant over ~5 weeks.
Delaware spans more than one climate: Zone 7 is the most common zone, but the state runs 7b to 7b. 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 Delaware: watch for
The pests that find zucchini here.
A middle-length season, about 203 frost-free days, means squash, summer overlaps squash bugs for a stretch each summer. Check plants every week or two and treat early.
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: Delaware gives zucchini about 203 frost-free days, and it needs roughly 50 days to a first harvest. That fits about 6 re-sown rounds across the season, so you can keep it coming instead of picking once.
Planting zucchini in Delaware: questions
When should I plant zucchini in Delaware?+
In a typical Delaware year, sow zucchini between Apr 19 to Aug 2, keyed to the state's median last frost around Apr 12. Your exact dates shift with your ZIP code and microclimate.
What USDA zone is Delaware?+
Delaware spans zones 7b–7b, mostly zone 7. 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.