When to plant zucchini in Geneva: 8 June – 31 August

In Geneva, zucchini: sow for seedlings from 27 April to 10 August; plant into a greenhouse from 18 May to 31 August; plant out into open ground from 8 June to 31 August.

Zucchini in Geneva: soil, season and weather

In Geneva the soil, not frost, sets the date: the last frost is over around 10 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 8 June, 59 days later.

Last spring frost	10 April
Top 7 cm of soil at 18 °C	8 June, 59 days after the last frost
First autumn frost	17 November, 162 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	14 July – 6 October
Days left for picking	126
Daylight	15:04 on 18 May, 15:40 on 8 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 9 rainy days

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

Zucchini in Geneva: care after planting

Planted on 8 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Geneva during the zucchini season

About 592 mm of rain falls in the season; August is the driest month (80 mm) and November the wettest (122 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.5	13.1	104	13	15:45
July	25.8	14.9	88	11	15:26
August	25.9	14.7	80	9	14:12
September	20.8	11	85	10	12:36
October	15.8	6.9	113	11	10:59
November	9.3	1.9	122	14	9:28

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Geneva, Chambéry is 5 days earlier and Aosta 23 days later.

City	Distance	Date	Difference
Annecy	32 km	19 June – 28 August	11 days later
Lausanne	52 km	19 June – 3 September	11 days later
Chambéry	72 km	3 June – 3 September	5 days earlier
Sion	94 km	28 June – 2 August	20 days later
Fribourg	102 km	21 June – 20 August	13 days later
Aosta	105 km	1 July – 5 August	23 days later

Where to buy zucchini plants and seeds near Geneva

Buy plants ready to set out from 8 June to 31 August (from 18 May to 31 August for an unheated greenhouse); seed for raising your own is sown from 27 April to 10 August. Within 15 km of Geneva OpenStreetMap lists 16 garden centres, 2 farm-supply shops, 8 markets and 23 farm shops (collected 27 October 2026).

Place du Marché — market
Sat 07:30–13:00 · 5 km · gaillard.fr
Place de la Libération — market
Tue, Fri 05:00–13:00; Mon, Wed–Thu, Sat–Sun closed · 7 km · annemasse.fr
Marché de Plainpalais — market
Tue, Fri 06:30–14:15; Wed, Sat, Sun 06:30–17:15 "winter"; Wed, Sat, Sun 06:30–18:15 "summer" · 0 km
Marché Helvétique — market
Wed, Sat 06:30–14:15 · 1 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