When to plant zucchini in St. Gallen: 15 June – 1 September

In St. Gallen, zucchini: sow for seedlings from 4 May to 11 August; plant into a greenhouse from 25 May to 1 September; plant out into open ground from 15 June to 1 September. For plants and seeds, the places nearby include Laternenhof (farm shop, 4 km) and Ebnet (farm shop, 11 km); addresses and opening hours are below.

Zucchini in St. Gallen: soil, season and weather

In St. Gallen the soil, not frost, sets the date: the last frost is over around 14 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 15 June, 62 days later.

Last spring frost	14 April
Top 7 cm of soil at 18 °C	15 June, 62 days after the last frost
First autumn frost	18 November, 156 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	21 July – 7 October
Days left for picking	120
Daylight	15:28 on 25 May, 15:56 on 15 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 13 rainy days

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

Zucchini in St. Gallen: care after planting

Planted on 15 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in St. Gallen during the zucchini season

About 711 mm of rain falls in the season; November is the driest month (89 mm) and August the wettest (155 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.7	13.4	131	15	15:56
July	23.7	14.9	130	16	15:36
August	23.5	14.8	155	13	14:18
September	19.1	11.1	108	12	12:37
October	14.5	7.2	98	12	10:56
November	7.9	2	89	13	9:21

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around St. Gallen, Locarno is 16 days earlier and Lucerne 13 days later.

City	Distance	Date	Difference
Zurich	63 km	11 June – 30 August	4 days earlier
Lucerne	90 km	28 June – 3 August	13 days later
Freiburg im Breisgau	130 km	4 June – 30 August	11 days earlier
Basel	135 km	5 June – 3 September	10 days earlier
Bellinzona	139 km	19 June – 29 August	4 days later
Locarno	146 km	30 May – 6 July	16 days earlier

Where to buy zucchini plants and seeds near St. Gallen

Buy plants ready to set out from 15 June to 1 September (from 25 May to 1 September for an unheated greenhouse); seed for raising your own is sown from 4 May to 11 August. Within 15 km of St. Gallen OpenStreetMap lists 7 garden centres, 3 farm-supply shops, 1 plant nursery, 3 markets and 24 farm shops (collected 27 October 2026).

Laternenhof — farm shop
Wilen, 9300 Wittenbach · 24/7 · 4 km · laternenhof.ch
Ebnet — farm shop
Ebnet 1, 9404 Rorschacherberg · 11 km · buerger-rorschach.ch
Öpfelfarm — farm shop
Olmishausen 18, 9314 Steinebrunn · 12 km · oepfelfarm.ch
Scherrer, Früchte von hier — farm shop
Buch 43, 9322 Egnach · Mon–Fri 15:00–18:30; Sat 10:00–17:00 · 13 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