When to plant zucchini in Green Bay: 27 May – 13 August

In Green Bay, zucchini: sow for seedlings from 15 April to 23 July; plant into a greenhouse from 6 May to 13 August; plant out into open ground from 27 May to 13 August.

Zucchini in Green Bay: soil, season and weather

In Green Bay the soil, not frost, sets the date: the last frost is over around 29 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 27 May, 28 days later.

Last spring frost	29 April
Top 7 cm of soil at 18 °C	27 May, 28 days after the last frost
First autumn frost	30 October, 156 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	2 July – 18 September
Days left for picking	120
Daylight	14:25 on 6 May, 15:11 on 27 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 9 rainy days

The same dates in Green Bay hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Green Bay: care after planting

Planted on 27 May: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Green Bay during the zucchini season

About 531 mm of rain falls in the season; September is the driest month (67 mm) and July the wettest (103 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.8	8.9	91	11	14:47
June	26.1	15.3	96	12	15:32
July	28	17.8	103	11	15:14
August	26.6	17	91	11	14:05
September	23	13.8	67	9	12:34
October	15.4	7	83	11	11:03

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

All the nearest cities on our list plant zucchini later than Green Bay; the closest date is in Milwaukee, 1 day later.

City	Distance	Date	Difference
Milwaukee	165 km	28 May – 15 August	1 day later
Traverse City	192 km	5 June – 23 August	9 days later
Madison	196 km	28 May – 10 August	1 day later
Grand Rapids	256 km	28 May – 17 August	1 day later
Rockford	265 km	28 May – 11 August	1 day later
Chicago	295 km	28 May – 20 August	1 day later

Where to buy zucchini plants and seeds near Green Bay

Buy plants ready to set out from 27 May to 13 August (from 6 May to 13 August for an unheated greenhouse); seed for raising your own is sown from 15 April to 23 July. Within 15 km of Green Bay OpenStreetMap lists 6 garden centres, 1 plant nursery and 2 markets (collected 20 October 2026).

Walmart Garden Center — garden centre
12 km
Pamperin Park Flower Garden — plant nursery
7 km
Oneida Farmers Market — market
Water Circle Place N7332, 54155 Oneida · Jun Thu[3]–Sept 30 Thu 12:00–18:00 · 14 km · oneida-nsn.gov
The Cannery Public Market — market
North Broadway 320, 54303 Green Bay · 0 km

Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

Questions