When to plant zucchini in Bielefeld: 5 June – 1 September

In Bielefeld, zucchini: sow for seedlings from 24 April to 11 August; plant into a greenhouse from 15 May to 1 September; plant out into open ground from 5 June to 1 September. For plants and seeds, the places nearby include Kampmeier Land- und Gartentechnik (farm supply, 15 km); addresses and opening hours are below.

Zucchini in Bielefeld: soil, season and weather

In Bielefeld the soil, not frost, sets the date: the last frost is over around 20 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 5 June, 46 days later.

Last spring frost	20 April
Top 7 cm of soil at 18 °C	5 June, 46 days after the last frost
First autumn frost	18 November, 166 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	11 July – 7 October
Days left for picking	130
Daylight	15:40 on 15 May, 16:31 on 5 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 11 rainy days

The same dates in Bielefeld hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Bielefeld: care after planting

Planted on 5 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Bielefeld during the zucchini season

About 433 mm of rain falls in the season; September is the driest month (63 mm) and October the wettest (84 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.8	12.9	72	12	16:42
July	23.3	13.8	78	14	16:17
August	23.8	14.2	66	14	14:43
September	20	11.1	63	11	12:43
October	14.9	8.3	84	15	10:44
November	9	3.5	70	14	8:50

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Bielefeld, Münster is 4 days earlier and Bremen 6 days later.

City	Distance	Date	Difference
Münster	62 km	1 June – 4 September	4 days earlier
Hanover	91 km	7 June – 4 September	2 days later
Dortmund	92 km	5 June – 30 August	same day
Bochum	108 km	3 June – 3 September	2 days earlier
Bremen	119 km	11 June – 2 September	6 days later
Essen	122 km	3 June – 4 September	2 days earlier

Where to buy zucchini plants and seeds near Bielefeld

Buy plants ready to set out from 5 June to 1 September (from 15 May to 1 September for an unheated greenhouse); seed for raising your own is sown from 24 April to 11 August. Within 15 km of Bielefeld OpenStreetMap lists 23 garden centres, 1 farm-supply shop, 2 plant nurseries, 13 markets and 26 farm shops (collected 28 October 2026).

Kampmeier Land- und Gartentechnik — farm supply
Siemensweg 3, 33758 Schloß Holte-Stukenbrock · 15 km
Hauptmarkt — market
Kesselbrink, Bielefeld · Sat 07:00–13:00 · 1 km · bielefeld.de
Ostmarkt — market
Jakobuskirchplatz, 33604 Bielefeld · Wed, Fri 07:00–13:00 · 2 km
Markt Brackwede — market
Tue, Thu, Sat 07:00–13:00 · 4 km · bielefeld.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.

Questions