When to plant pumpkins in Karlsruhe: 30 May – 25 July

In Karlsruhe, pumpkin: sow for seedlings from 28 March to 13 June; plant into a greenhouse from 9 May to 25 July; plant out into open ground from 30 May to 25 July.

Pumpkin in Karlsruhe: soil, season and weather

In Karlsruhe the soil, not frost, sets the date: the last frost is over around 5 April, but the top 7 cm of soil reaches 18 °C — the minimum on the pumpkin card — only around 30 May, 55 days later.

Last spring frost	5 April
Top 7 cm of soil at 18 °C	30 May, 55 days after the last frost
First autumn frost	19 November, 173 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	13 August – 8 October
Days left for picking	98
Daylight	13:51 on 18 April, 15:51 on 30 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 10 rainy days

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

Pumpkin in Karlsruhe: care after planting

Planted on 30 May: in the first weeks water every 4 days.

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

20 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 Karlsruhe during the pumpkin season

About 482 mm of rain falls in the season; August is the driest month (54 mm) and May the wettest (82 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	19.8	9.7	82	13	15:16
June	25.2	14.8	71	11	16:11
July	26.2	15.8	63	11	15:49
August	26.4	16.1	54	10	14:26
September	22	12.4	62	10	12:39
October	16.5	8.5	80	13	10:52
November	9.6	3.4	70	13	9:11

ERA5 2016–2025, Open-Meteo

Pumpkin in nearby cities

1 of the nearest cities share Karlsruhe's date.

City	Distance	Date	Difference
Mannheim	54 km	1 June – 26 July	2 days later
Stuttgart	62 km	5 June – 14 July	6 days later
Strasbourg	68 km	1 June – 26 July	2 days later
Saarbrücken	106 km	3 June – 24 July	4 days later
Wiesbaden	120 km	30 May – 29 July	same day
Freiburg im Breisgau	120 km	4 June – 22 July	5 days later

Where to buy pumpkin plants and seeds near Karlsruhe

Buy plants ready to set out from 30 May to 25 July (from 9 May to 25 July for an unheated greenhouse); seed for raising your own is sown from 28 March to 13 June. Within 15 km of Karlsruhe OpenStreetMap lists 25 garden centres, 3 farm-supply shops, 18 plant nurseries, 23 markets and 59 farm shops (collected 28 October 2026).

Wochenmarkt Gottesauer Platz — market
Wed, Fri 07:30–13:00; public holidays closed · 2 km · karlsruhe.de
Wochenmarkt — market
Donauring 71, 76344 Eggenstein-Leopoldshafen · Fri 14:00 - 18:00 · 9 km
Wochenmarkt — market
Sat 08:00–12:00 · 10 km · wochenmarkt-pfinztal.de
Walther-Rathenau-Platz — market
Tue, Sat 07:30–13:00 · 3 km · karlsruhe.de

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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