Growing Trombetta Zucchini in Zone 3b
Zone 3b has harsh winters and a short growing season. Start Trombetta Zucchini early indoors to maximize your harvest window. Last frost: May 15. First frost: Sep 22.
Planting Calendar
Season: May 15 – Sep 22 (130 days) · Succession: plant every 3 weeks (up to 3x)
When to Plant Trombetta Zucchini in Zone 3b
Start Seeds Indoors: Apr 17
Start Trombetta Zucchini seeds indoors around Apr 17 (4 weeks before last frost). Optimal germination temperature: 85°F. Germinates in 4–10 days.
Transplant Outdoors: May 29
Transplant Trombetta Zucchini seedlings outdoors after May 29. Wait until soil temperature reaches 65°F. Space plants at 1/sqft (12" apart). Harden off plants for a week before moving outside.
Harvest: Jul 3
First harvest approximately Jul 3 (~35 days from transplant). Continue harvesting until first frost (Sep 22).
Fall Planting: Jul 14
For a fall harvest, plant Trombetta Zucchini around Jul 14 (10 weeks before first frost).
Trombetta Zucchini in Other Zones
1a 1b 2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a 9b 10a 10b 11a 11b 12a 12b 13a 13bPlan Your Trombetta Zucchini Garden
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