When to plant pumpkins in Leuven: 31 May – 28 July

In Leuven, pumpkin: sow for seedlings from 29 March to 16 June; plant into a greenhouse from 10 May to 28 July; plant out into open ground from 31 May to 28 July. For plants and seeds, the places nearby include Ferme Evrard (farm shop, 13 km) and Le potager d'Elise (farm shop, 14 km); addresses and opening hours are below.

Pumpkin in Leuven: soil, season and weather

In Leuven the soil, not frost, sets the date: the last frost is over around 19 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 31 May, 42 days later.

Last spring frost	19 April
Top 7 cm of soil at 18 °C	31 May, 42 days after the last frost
First autumn frost	22 November, 175 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	14 August – 11 October
Days left for picking	100
Daylight	14:02 on 19 April, 16:10 on 31 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, September, has 11 rainy days

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

Pumpkin in Leuven: care after planting

Planted on 31 May: in the first weeks water every 4 days.

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

21 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 Leuven during the pumpkin season

About 511 mm of rain falls in the season; September is the driest month (62 mm) and June the wettest (81 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.1	8.8	69	11	15:30
June	22.7	13.1	81	12	16:30
July	23.5	14	79	12	16:06
August	23.7	14.3	69	13	14:36
September	20.6	11.8	62	11	12:42
October	15.9	9.3	81	13	10:47
November	10.2	4.7	70	14	8:59

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around Leuven, Hasselt is 1 day earlier and Namur 11 days later.

City	Distance	Date	Difference
Brussels	25 km	8 June – 28 July	8 days later
Antwerp	43 km	31 May – 28 July	same day
Hasselt	45 km	30 May – 24 July	1 day earlier
Namur	47 km	11 June – 21 July	11 days later
Charleroi	55 km	10 June – 21 July	10 days later
Liège	67 km	4 June – 25 July	4 days later

Where to buy pumpkin plants and seeds near Leuven

Buy plants ready to set out from 31 May to 28 July (from 10 May to 28 July for an unheated greenhouse); seed for raising your own is sown from 29 March to 16 June. Within 15 km of Leuven OpenStreetMap lists 31 garden centres, 1 plant nursery, 7 markets and 21 farm shops (collected 27 October 2026).

Zaterdagmarkt — market
Sat 09:00–18:00 · 0 km
Vrijdagmarkt — market
Fri 07:00–13:00 · 1 km
Ferme Evrard — farm shop · sells: vegetable, fruit
Chemin du Vivier Saint-Laurent 2 · Mon–Fri 08:00–19:00; Sat 08:00–18:30 · 13 km · ferme-evrard.be
Le potager d'Elise — farm shop · sells: vegetable
Rue de Wahenge 3 · Wed, Fri 14:00–18:00; Sat 10:00–17:00; public holidays closed · 14 km · lepotagerdelise.be

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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