When to plant pumpkins in Rennes: 1 June – 3 August

In Rennes, pumpkin: sow for seedlings from 30 March to 22 June; plant into a greenhouse from 11 May to 3 August; plant out into open ground from 1 June to 3 August.

Pumpkin in Rennes: soil, season and weather

In Rennes the soil, not frost, sets the date: the last frost is over around 12 March, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 1 June, 81 days later.

Last spring frost	12 March
Top 7 cm of soil at 18 °C	1 June, 81 days after the last frost
First autumn frost	28 November, 180 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	15 August – 17 October
Days left for picking	105
Daylight	13:55 on 20 April, 15:47 on 1 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 9 rainy days

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

Pumpkin in Rennes: care after planting

Planted on 1 June: in the first weeks water every 4 days.

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

22 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 Rennes during the pumpkin season

About 404 mm of rain falls in the season; August is the driest month (48 mm) and October the wettest (87 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.8	12.9	83	11	16:02
July	24.3	14.3	50	8	15:41
August	24.4	14.4	48	9	14:21
September	21.5	12.4	58	9	12:38
October	17.4	9.8	87	12	10:54
November	12.4	6.1	78	12	9:17

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around Rennes, Nantes is 4 days earlier and Caen 14 days later.

City	Distance	Date	Difference
Nantes	99 km	28 May – 4 August	4 days earlier
Angers	110 km	28 May – 2 August	4 days earlier
Le Mans	140 km	31 May – 30 July	1 day earlier
Caen	154 km	15 June – 10 August	14 days later
Quimper	180 km	15 June – 14 August	14 days later
Tours	194 km	31 May – 2 August	1 day earlier

Where to buy pumpkin plants and seeds near Rennes

Buy plants ready to set out from 1 June to 3 August (from 11 May to 3 August for an unheated greenhouse); seed for raising your own is sown from 30 March to 22 June. Within 15 km of Rennes OpenStreetMap lists 21 garden centres, 5 farm-supply shops, 3 plant nurseries, 41 markets and 19 farm shops (collected 20 October 2026).

Marché alimentaire — market
Mon–Wed, Fri–Sun closed; Thu 07:30–12:30 · 10 km · tourisme-rennes.com
Marché de Quincé — market
Chemin rural 16 du CR 8 à la RN 137, 35760 Rennes · Thu 18:00–20:00 · 3 km
Marché alimentaire et de produits manufacturés — market
Thu · 8 km · tourisme-rennes.com
Halle Pagnol — market
Fri 08:00–13:00 · 11 km · ville-bruz.fr

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