When to plant pumpkins in Green Bay: 27 May – 5 July

In Green Bay, pumpkin: sow for seedlings from 25 March to 24 May; plant into a greenhouse from 6 May to 5 July; plant out into open ground from 27 May to 5 July.

Pumpkin 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 pumpkin 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)	75
First harvest, if planted in this window	10 August – 18 September
Days left for picking	81
Daylight	13:27 on 15 April, 15:11 on 27 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 9 rainy days

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

Pumpkin in Green Bay: care after planting

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

Feeding, by the card’s schedule from that day:

17 June — feed: nitrogen

Pests and diseases of pumpkin to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Green Bay during the pumpkin 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

Pumpkin in nearby cities

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

City	Distance	Date	Difference
Milwaukee	165 km	28 May – 7 July	1 day later
Traverse City	192 km	5 June – 15 July	9 days later
Madison	196 km	28 May – 2 July	1 day later
Grand Rapids	256 km	28 May – 9 July	1 day later
Rockford	265 km	28 May – 3 July	1 day later
Chicago	295 km	28 May – 12 July	1 day later

Where to buy pumpkin plants and seeds near Green Bay

Buy plants ready to set out from 27 May to 5 July (from 6 May to 5 July for an unheated greenhouse); seed for raising your own is sown from 25 March to 24 May. Within 15 km of Green Bay OpenStreetMap lists 6 garden centres, 1 plant nursery and 2 markets (collected 20 October 2026).

Ivy Trails — garden centre
11 km
Green Bay Nursury — garden centre
4 km
Lindsley's Greenhouse — garden centre
5 km
Stein's Garden & Home — garden centre
8 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