When to plant cucumbers in Lucerne: 28 June – 5 August

In Lucerne, cucumber: sow for seedlings from 10 May to 8 July; plant into a greenhouse from 7 June to 5 August; plant out into open ground from 28 June to 5 August.

Cucumber in Lucerne: soil, season and weather

In Lucerne the soil, not frost, sets the date: the last frost is over around 2 May, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 28 June, 57 days later.

Last spring frost	2 May
Top 7 cm of soil at 18 °C	28 June, 57 days after the last frost
Into an unheated greenhouse	7 June – 5 August; June outside: 9.7 °C at night, 18.2 °C by day; card 18–25 °C
First autumn frost	20 October, 114 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	1 August – 8 September
Days left for picking	80
Daylight	15:36 on 31 May, 15:53 on 28 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, October, has 13 rainy days

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

Cucumber in Lucerne: care after planting

Planted on 28 June: in the first weeks water every 4 days.

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

5 July — 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 Lucerne during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 19.4 °C. Months that stay below 18 °C even by day on average: September (15.4 °C) and October (12.1 °C). Nights average below 18 °C in every month of the season, from 4.1 °C to 11.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	18.2	9.7	177	19	15:53
July	19.3	11.5	215	20	15:33
August	19.4	11.4	192	16	14:16
September	15.4	7.8	160	16	12:37
October	12.1	4.1	134	13	10:57

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

All the nearest cities on our list plant cucumber earlier than Lucerne; the closest date is in Bern, 7 days earlier.

City	Distance	Date	Difference
Zurich	41 km	11 June – 1 September	17 days earlier
Bern	66 km	21 June – 19 August	7 days earlier
Basel	79 km	5 June – 5 September	23 days earlier
St. Gallen	90 km	15 June – 3 September	13 days earlier
Fribourg	92 km	21 June – 22 August	7 days earlier
Locarno	105 km	30 May – 8 July	29 days earlier

Where to buy cucumber plants and seeds near Lucerne

Buy plants ready to set out from 28 June to 5 August (from 7 June to 5 August for an unheated greenhouse); seed for raising your own is sown from 10 May to 8 July. Within 15 km of Lucerne OpenStreetMap lists 7 garden centres, 1 farm-supply shop, 1 plant nursery, 16 markets and 37 farm shops (collected 27 October 2026).

Fischmarkt "Unter der Egg" — market
Unter der Egg, 6004 Luzern · Tue, Fri, Sat 07:00–12:00 · 0 km
Fischmarkt Helvetiaplatz — market
Moosstrasse, 6003 Luzern · Sat 8:00–12:00 · 1 km
Stanser Wochenmarkt — market
Dorfplatz, 6370 Stans · Apr–Nov: Sat 07:30–12:00 · 11 km
Herbstmesse Luzern — market
Inseliquai, 6005 Luzern · 0 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.

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