When to plant zucchini in Bern: 21 June – 17 August

In Bern, zucchini: sow for seedlings from 10 May to 27 July; plant into a greenhouse from 31 May to 17 August; plant out into open ground from 21 June to 17 August. For plants and seeds, the places nearby include GmüesGarage (farm shop, 4 km) and Hofladen Hof Strahm (farm shop, 11 km); addresses and opening hours are below.

Zucchini in Bern: soil, season and weather

In Bern the soil, not frost, sets the date: the last frost is over around 24 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 21 June, 58 days later.

Last spring frost	24 April
Top 7 cm of soil at 18 °C	21 June, 58 days after the last frost
First autumn frost	3 November, 135 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	27 July – 22 September
Days left for picking	99
Daylight	15:35 on 31 May, 15:54 on 21 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, September, has 12 rainy days

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

Zucchini in Bern: care after planting

Planted on 21 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Bern during the zucchini season

About 633 mm of rain falls in the season; September is the driest month (94 mm) and June the wettest (120 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.1	11.4	120	15	15:52
July	23.7	12.9	120	15	15:32
August	23.7	12.6	99	12	14:16
September	19	8.9	94	12	12:37
October	13.9	4.8	99	12	10:57
November	6.9	-0.3	101	13	9:24

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Bern, Basel is 16 days earlier and Lucerne 7 days later.

City	Distance	Date	Difference
Fribourg	28 km	21 June – 20 August	same day
Neuchâtel	40 km	6 June – 11 September	15 days earlier
Lucerne	66 km	28 June – 3 August	7 days later
Basel	69 km	5 June – 3 September	16 days earlier
Lausanne	79 km	19 June – 3 September	2 days earlier
Sion	80 km	28 June – 2 August	7 days later

Where to buy zucchini plants and seeds near Bern

Buy plants ready to set out from 21 June to 17 August (from 31 May to 17 August for an unheated greenhouse); seed for raising your own is sown from 10 May to 27 July. Within 15 km of Bern OpenStreetMap lists 8 garden centres, 2 plant nurseries, 8 markets and 53 farm shops (collected 27 October 2026).

Hofladen Hof Strahm — farm shop
Sägegasse 58, 3110 Münsingen · Mon–Sun 07:30–20:00 · 11 km · myfarm.ch
Hofladen Hof Moosmatt — farm shop
Bahnhofstrasse 31a, 3111 Tägertschi · Mon–Sun 08:00–20:00 · 13 km · myfarm.ch
Obereichi Hoflädeli — farm shop
Obereichistrasse 77a, 3148 Lanzenhäusern · 24/7 · 15 km · obereichi.ch
GmüesGarage — farm shop
Seftigenstrasse 400, 3084 Wabern · 07:00–21:00 · 4 km · gruenesband.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.

Questions