When to plant zucchini in Lausanne: 19 June – 3 September

In Lausanne, zucchini: sow for seedlings from 8 May to 13 August; plant into a greenhouse from 29 May to 3 September; plant out into open ground from 19 June to 3 September.

Zucchini in Lausanne: soil, season and weather

In Lausanne the soil, not frost, sets the date: the last frost is over around 12 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 19 June, 68 days later.

Last spring frost	12 April
Top 7 cm of soil at 18 °C	19 June, 68 days after the last frost
First autumn frost	20 November, 154 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	25 July – 9 October
Days left for picking	118
Daylight	15:29 on 29 May, 15:50 on 19 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 12 rainy days

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

Zucchini in Lausanne: care after planting

Planted on 19 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Lausanne during the zucchini season

About 845 mm of rain falls in the season; August is the driest month (131 mm) and June the wettest (148 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.9	12.9	148	16	15:48
July	22.7	14.8	144	15	15:29
August	22.7	15	131	12	14:14
September	18.4	11.8	140	14	12:36
October	13.9	7.8	134	12	10:58
November	7.8	2.8	148	15	9:26

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Lausanne, Neuchâtel is 13 days earlier and Sion 9 days later.

City	Distance	Date	Difference
Fribourg	50 km	21 June – 20 August	2 days later
Geneva	52 km	8 June – 31 August	11 days earlier
Neuchâtel	57 km	6 June – 11 September	13 days earlier
Sion	65 km	28 June – 2 August	9 days later
Annecy	78 km	19 June – 28 August	same day
Bern	79 km	21 June – 17 August	2 days later

Where to buy zucchini plants and seeds near Lausanne

Buy plants ready to set out from 19 June to 3 September (from 29 May to 3 September for an unheated greenhouse); seed for raising your own is sown from 8 May to 13 August. Within 15 km of Lausanne OpenStreetMap lists 5 garden centres, 4 farm-supply shops, 5 plant nurseries, 19 markets and 58 farm shops (collected 27 October 2026).

Marché dominical d'Ouchy — market
Apr–Sept: Sun 08:00–20:00 · 2 km · lausanne.ch
Marché de la Sallaz — market
Thu 15:00–19:00 · 2 km · lausanne.ch
Marché de Cully — market
Thu 08:00–12:00 · 8 km · b-e-l.ch
Marché du dimanche — market
May–Oct: Sun 10:00–16:00 · 9 km · b-e-l.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