When to plant pumpkins in Bonn: 4 June – 25 July

In Bonn, pumpkin: sow for seedlings from 2 April to 13 June; plant into a greenhouse from 14 May to 25 July; plant out into open ground from 4 June to 25 July.

Pumpkin in Bonn: soil, season and weather

In Bonn the soil, not frost, sets the date: the last frost is over around 8 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 4 June, 57 days later.

Last spring frost	8 April
Top 7 cm of soil at 18 °C	4 June, 57 days after the last frost
First autumn frost	19 November, 168 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	18 August – 8 October
Days left for picking	93
Daylight	14:16 on 23 April, 16:16 on 4 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 12 rainy days

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

Pumpkin in Bonn: care after planting

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

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

25 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 Bonn during the pumpkin season

About 443 mm of rain falls in the season; August is the driest month (64 mm) and July the wettest (83 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.6	13.6	76	12	16:28
July	24.3	14.6	83	13	16:05
August	24.8	14.9	64	12	14:35
September	21	11.8	77	10	12:41
October	15.9	8.9	70	14	10:48
November	10.1	4.3	73	15	9:00

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

Around Bonn, Cologne is 1 day earlier and Dortmund 1 day later.

City	Distance	Date	Difference
Cologne	25 km	3 June – 26 July	1 day earlier
Düsseldorf	60 km	3 June – 27 July	1 day earlier
Duisburg	81 km	3 June – 28 July	1 day earlier
Essen	81 km	3 June – 27 July	1 day earlier
Bochum	84 km	3 June – 26 July	1 day earlier
Dortmund	90 km	5 June – 22 July	1 day later

Where to buy pumpkin plants and seeds near Bonn

Buy plants ready to set out from 4 June to 25 July (from 14 May to 25 July for an unheated greenhouse); seed for raising your own is sown from 2 April to 13 June. Within 15 km of Bonn OpenStreetMap lists 32 garden centres, 4 farm-supply shops, 3 plant nurseries, 9 markets and 50 farm shops (collected 28 October 2026).

Feierabendmarkt Birlinghoven — market
Mühlenweg, 53757 Sankt Augustin · Wed 14:00–18:00; public holidays closed · 9 km · markt.bv-birlinghoven.de
Wochenmarkt — market
Mon–Fri 08:00–18:30; Sat 08:00–16:00 · 1 km · bonn.market
Wochenmarkt — market
Fri 14:00–18:00 · 5 km · wok-oberkassel.de
Ziepchensplatz — market
Löwenburgstraße, 53604 · 24/7 · 11 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