When to plant zucchini in Duisburg: 3 June – 5 September

In Duisburg, zucchini: sow for seedlings from 22 April to 15 August; plant into a greenhouse from 13 May to 5 September; plant out into open ground from 3 June to 5 September. For plants and seeds, the places nearby include Vennemann (farm supply, 12 km) and Raiffeisen-Markt Niep (farm supply, 14 km); addresses and opening hours are below.

Zucchini in Duisburg: soil, season and weather

In Duisburg 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 zucchini card — only around 3 June, 59 days later.

Last spring frost	5 April
Top 7 cm of soil at 18 °C	3 June, 59 days after the last frost
First autumn frost	22 November, 172 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	9 July – 11 October
Days left for picking	136
Daylight	15:29 on 13 May, 16:21 on 3 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 13 rainy days

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

Zucchini in Duisburg: care after planting

Planted on 3 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Duisburg during the zucchini season

About 428 mm of rain falls in the season; August is the driest month (62 mm) and October the wettest (79 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.2	13.8	75	12	16:36
July	23.7	14.8	69	13	16:11
August	24	15	62	13	14:39
September	20.5	12.2	74	12	12:42
October	15.6	9.3	79	13	10:46
November	9.8	4.6	69	14	8:55

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

4 of the nearest cities share Duisburg's date.

City	Distance	Date	Difference
Essen	18 km	3 June – 4 September	same day
Düsseldorf	22 km	3 June – 4 September	same day
Bochum	32 km	3 June – 3 September	same day
Dortmund	50 km	5 June – 30 August	2 days later
Cologne	56 km	3 June – 3 September	same day
Bonn	81 km	4 June – 2 September	1 day later

Where to buy zucchini plants and seeds near Duisburg

Buy plants ready to set out from 3 June to 5 September (from 13 May to 5 September for an unheated greenhouse); seed for raising your own is sown from 22 April to 15 August. Within 15 km of Duisburg OpenStreetMap lists 44 garden centres, 3 farm-supply shops, 5 plant nurseries, 35 markets and 27 farm shops (collected 28 October 2026).

Raiffeisen-Markt Niep — farm supply
Hülser Straße 1-5, 47506 Neukirchen-Vluyn · Mar–Sept: Mon–Fri 08:00–18:30; Mar–Sept: Sat 08:00–14:00; Oct–Feb: Mon–Fri 08:00–18:00; Oct–Feb: Sat 08:00–14:00 · 14 km
Vennemann — farm supply
Mon–Fri 08:00–18:00; Sat 09:00–13:00; Sun, public holidays closed · 12 km · vennemann-krefeld.de
Wochenmarkt Angermund — market
Angermunder Straße 1, 40489 Düsseldorf · Fri 07:00–14:00 · 11 km · duesseldorf.de
Mein Johannismarkt - direkt vom Bauern — market
Johannismarkt 18, 47169 Duisburg · Sat 07:00–14:00 · 9 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