When to plant cucumbers in Düsseldorf: 3 June – 6 September

In Düsseldorf, cucumber: sow for seedlings from 15 April to 9 August; plant into a greenhouse from 13 May to 6 September; plant out into open ground from 3 June to 6 September. For plants and seeds, the places nearby include Gartenhof Küsters (garden centre, 11 km) and Gartencener Groß in Grün Schmitz (garden centre, 11 km); addresses and opening hours are below.

Cucumber in Düsseldorf: soil, season and weather

In Düsseldorf the soil, not frost, sets the date: the last frost is over around 4 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 3 June, 60 days later.

Last spring frost	4 April
Top 7 cm of soil at 18 °C	3 June, 60 days after the last frost
Into an unheated greenhouse	13 May – 6 September; May outside: 9.4 °C at night, 19.2 °C by day; card 18–25 °C
First autumn frost	21 November, 171 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	7 July – 10 October
Days left for picking	137
Daylight	15:05 on 6 May, 16:19 on 3 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, June, has 12 rainy days

The same dates in Düsseldorf hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Düsseldorf: care after planting

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

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

10 June — feed: nitrogen

Pests and diseases of cucumber 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 Düsseldorf during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 24.4 °C. Months that stay below 18 °C even by day on average: October (15.7 °C) and November (9.9 °C). Nights average below 18 °C in every month of the season, from 4.5 °C to 15.2 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.4	13.9	74	12	16:33
July	24.1	14.8	83	14	16:09
August	24.4	15.2	74	13	14:38
September	20.7	12.2	78	11	12:42
October	15.7	9.2	84	14	10:46
November	9.9	4.5	78	15	8:56

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

4 of the nearest cities share Düsseldorf's date.

City	Distance	Date	Difference
Duisburg	22 km	3 June – 7 September	same day
Essen	30 km	3 June – 6 September	same day
Cologne	35 km	3 June – 5 September	same day
Bochum	41 km	3 June – 5 September	same day
Dortmund	57 km	5 June – 1 September	2 days later
Bonn	60 km	4 June – 4 September	1 day later

Where to buy cucumber plants and seeds near Düsseldorf

Buy plants ready to set out from 3 June to 6 September (from 13 May to 6 September for an unheated greenhouse); seed for raising your own is sown from 15 April to 9 August. Within 15 km of Düsseldorf OpenStreetMap lists 39 garden centres, 1 farm-supply shop, 8 plant nurseries, 46 markets and 64 farm shops (collected 28 October 2026).

Gartenhof Küsters — garden centre
Am Gartenhof 1, 41470 Neuss · Mon–Fri 10:00–18:30; Sat 10:00–14:00 · 11 km · gartenhof-kuesters.de
Gartencener Groß in Grün Schmitz — garden centre
Baumschule Schmitz 1, 41564 Kaarst · Mon–Fri 09:00–18:30; Sat 09:00–16:00; Sun 11:00–14:00 · 11 km · grossingruen.de
Schmitz Pflanzencenter — garden centre
Baumschule Schmitz 1, 41564 Kaarst · Mon–Fri 09:00–18:00; Sat 09:00–16:00; Sun 11:00–14:00 · 11 km · schmitzgarten.de
Pflanzen Laukart — garden centre
Walder Straße 99, 40724 Hilden · Mon–Fri 09:00–19:00; Sat 09:00–18:00; Sun 11:00–16:00 · 14 km · pflanzen-laukart.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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