When to plant cucumbers in Neuchâtel: 6 June – 13 September

In Neuchâtel, cucumber: sow for seedlings from 18 April to 16 August; plant into a greenhouse from 16 May to 13 September; plant out into open ground from 6 June to 13 September. For plants and seeds, the places nearby include Agri Centre Stähli Sàrl (farm supply, 8 km) and Bovet SA (farm supply, 11 km); addresses and opening hours are below.

Cucumber in Neuchâtel: soil, season and weather

In Neuchâtel the soil, not frost, sets the date: the last frost is over around 29 March, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 6 June, 69 days later.

Last spring frost	29 March
Top 7 cm of soil at 18 °C	6 June, 69 days after the last frost
Into an unheated greenhouse	16 May – 13 September; May outside: 9.5 °C at night, 18 °C by day; card 18–25 °C
First autumn frost	28 November, 175 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	10 July – 17 October
Days left for picking	141
Daylight	14:47 on 9 May, 15:44 on 6 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, September, has 12 rainy days

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

Cucumber in Neuchâtel: care after planting

Planted on 6 June: in the first weeks water every 4 days.

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

13 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 Neuchâtel during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, July, averages 25.1 °C. Months that stay below 18 °C even by day on average: October (15.6 °C) and November (9.2 °C). Nights average below 18 °C in every month of the season, from 4.3 °C to 16.6 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.7	14.7	115	15	15:52
July	25.1	16.5	112	13	15:32
August	25.1	16.6	101	13	14:16
September	20.5	13.2	96	12	12:37
October	15.6	9.2	113	13	10:57
November	9.2	4.3	114	14	9:24

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Neuchâtel, Mulhouse is 5 days earlier and Fribourg 15 days later.

City	Distance	Date	Difference
Fribourg	27 km	21 June – 22 August	15 days later
Bern	40 km	21 June – 19 August	15 days later
Lausanne	57 km	19 June – 5 September	13 days later
Besançon	75 km	3 June – 3 September	3 days earlier
Basel	81 km	5 June – 5 September	1 day earlier
Mulhouse	90 km	1 June – 2 September	5 days earlier

Where to buy cucumber plants and seeds near Neuchâtel

Buy plants ready to set out from 6 June to 13 September (from 16 May to 13 September for an unheated greenhouse); seed for raising your own is sown from 18 April to 16 August. Within 15 km of Neuchâtel OpenStreetMap lists 4 garden centres, 3 farm-supply shops, 2 plant nurseries, 2 markets and 20 farm shops (collected 27 October 2026).

Agri Centre Stähli Sàrl — farm supply
Grand-Rue 50, 2054 Chézard-St-Martin · 8 km · agri-centre.ch
Bovet SA — farm supply
Mon–Thu 07:15–12:00, 13:15–17:15; Fri 07:15–12:00, 13:15–16:45 · 11 km · bovet-sa.ch
Hall'titude — market
rue de la serre 19 · Tue–Fri 08:00–18:30; Sat 07:00–16:00 · 15 km · halltitude.market
Marché de Neuchâtel — market
Tue, Thu, Sat 07:00–13:00 · 0 km · marche-neuchatel.ch

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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