When to plant zucchini in Saint-Étienne: 14 June – 31 August

In Saint-Étienne, zucchini: sow for seedlings from 3 May to 10 August; plant into a greenhouse from 24 May to 31 August; plant out into open ground from 14 June to 31 August.

Zucchini in Saint-Étienne: soil, season and weather

In Saint-Étienne the soil, not frost, sets the date: the last frost is over around 13 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 14 June, 62 days later.

Last spring frost	13 April
Top 7 cm of soil at 18 °C	14 June, 62 days after the last frost
First autumn frost	17 November, 156 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	20 July – 6 October
Days left for picking	120
Daylight	15:12 on 24 May, 15:39 on 14 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 8 rainy days

The same dates in Saint-Étienne hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Saint-Étienne: care after planting

Planted on 14 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Saint-Étienne during the zucchini season

About 490 mm of rain falls in the season; August is the driest month (64 mm) and October the wettest (105 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.3	12.9	99	14	15:39
July	25.5	14.5	68	9	15:21
August	25.7	14.5	64	8	14:09
September	21	11.1	71	10	12:35
October	16.3	7.7	105	11	11:01
November	9.9	2.9	83	12	9:32

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Saint-Étienne, Lyon is 18 days earlier and Grenoble 14 days later.

City	Distance	Date	Difference
Lyon	50 km	27 May – 8 September	18 days earlier
Valence	70 km	29 May – 4 September	16 days earlier
Grenoble	108 km	28 June – 8 August	14 days later
Clermont-Ferrand	109 km	27 June – 26 August	13 days later
Chambéry	120 km	3 June – 3 September	11 days earlier
Annecy	145 km	19 June – 28 August	5 days later

Where to buy zucchini plants and seeds near Saint-Étienne

Buy plants ready to set out from 14 June to 31 August (from 24 May to 31 August for an unheated greenhouse); seed for raising your own is sown from 3 May to 10 August. Within 15 km of Saint-Étienne OpenStreetMap lists 12 garden centres, 5 farm-supply shops, 1 plant nursery, 21 markets and 13 farm shops (collected 20 October 2026).

Marché de Saint-François — market
Wed 06:00–13:00; Sun 06:00–13:00 · 1 km
Marché de Saint-Roch — market
Tue 06:00–13:00; Thu 06:00–13:00; Sat 06:00–13:00 · 1 km
Marché du Soleil — market
Mon 06:00–13:00 · 2 km
Marché Cours Fauriel — market
Wed 06:00–13:00; Sat 06:00–13:00 · 2 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