When to plant pumpkins in Ann Arbor: 29 May – 11 July

In Ann Arbor, pumpkin: sow for seedlings from 27 March to 30 May; plant into a greenhouse from 8 May to 11 July; plant out into open ground from 29 May to 11 July. For plants and seeds, the places nearby include Downtown Home and Garden (garden centre, 0 km) and Turner's Nursery & Landscaping (garden centre, 7 km); addresses and opening hours are below.

Pumpkin in Ann Arbor: soil, season and weather

In Ann Arbor the soil, not frost, sets the date: the last frost is over around 28 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 29 May, 31 days later.

Last spring frost	28 April
Top 7 cm of soil at 18 °C	29 May, 31 days after the last frost
First autumn frost	5 November, 160 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	12 August – 24 September
Days left for picking	85
Daylight	13:26 on 17 April, 14:59 on 29 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, November, has 10 rainy days

The same dates in Ann Arbor hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Watermelon.

Pumpkin in Ann Arbor: care after planting

Planted on 29 May: in the first weeks water every 4 days.

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

19 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 Ann Arbor during the pumpkin season

About 569 mm of rain falls in the season; November is the driest month (56 mm) and July the wettest (92 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	20.6	9.7	88	13	14:34
June	26.3	15.5	87	12	15:15
July	28.1	18	92	13	14:59
August	26.9	17.1	87	11	13:56
September	23.7	14.1	73	9	12:32
October	16.7	8	86	12	11:07
November	8.7	0.9	56	10	9:49

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

All the nearest cities on our list plant pumpkin earlier than Ann Arbor; the closest date is in Lansing, 1 day earlier.

City	Distance	Date	Difference
Detroit	58 km	27 May – 13 July	2 days earlier
Windsor	60 km	27 May – 13 July	2 days earlier
Toledo (United States)	72 km	24 May – 13 July	5 days earlier
Lansing	82 km	28 May – 8 July	1 day earlier
Grand Rapids	174 km	28 May – 9 July	1 day earlier
Fort Wayne	176 km	21 May – 8 July	8 days earlier

Where to buy pumpkin plants and seeds near Ann Arbor

Buy plants ready to set out from 29 May to 11 July (from 8 May to 11 July for an unheated greenhouse); seed for raising your own is sown from 27 March to 30 May. Within 15 km of Ann Arbor OpenStreetMap lists 4 garden centres, 1 farm-supply shop, 2 plant nurseries, 10 markets and 5 farm shops (collected 28 October 2026).

White Lotus Farms — farm shop
10 km · whitelotusfarms.com
Jenny's Farm Market — farm shop
14 km
Downtown Home and Garden — garden centre
South Ashley Street 210 · Mon–Sat 07:30–19:00; Sun 10:00–17:00 · 0 km · downtownhomeandgarden.com
Turner's Nursery & Landscaping — garden centre
South Wagner Road 4431, 48103 Ann Arbor · 7 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.

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