When to plant cucumbers in Clermont-Ferrand: 27 June – 28 August

In Clermont-Ferrand, cucumber: sow for seedlings from 9 May to 31 July; plant into a greenhouse from 6 June to 28 August; plant out into open ground from 27 June to 28 August. For plants and seeds, the places nearby include Culture Indoor (garden centre, 6 km) and Gamm Vert (garden centre, 9 km); addresses and opening hours are below.

Cucumber in Clermont-Ferrand: soil, season and weather

In Clermont-Ferrand the soil, not frost, sets the date: the last frost is over around 15 April, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 27 June, 73 days later.

Last spring frost	15 April
Top 7 cm of soil at 18 °C	27 June, 73 days after the last frost
Into an unheated greenhouse	6 June – 28 August; June outside: 11.2 °C at night, 19.9 °C by day; card 18–25 °C
First autumn frost	12 November, 138 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	31 July – 1 October
Days left for picking	104
Daylight	15:25 on 30 May, 15:42 on 27 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, July, has 10 rainy days

The same dates in Clermont-Ferrand hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Clermont-Ferrand: care after planting

Planted on 27 June: in the first weeks water every 4 days.

Feeding, by the card’s schedule from that day:

4 July — feed: nitrogen

Pests and diseases of cucumber to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Weather in Clermont-Ferrand during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 22.5 °C. Months that stay below 18 °C even by day on average: October (14.4 °C) and November (8.3 °C). Nights average below 18 °C in every month of the season, from 2.1 °C to 12.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	19.9	11.2	129	15	15:42
July	22.1	12.6	58	10	15:23
August	22.5	12.8	60	10	14:10
September	18.4	9.5	70	11	12:36
October	14.4	6.6	74	11	11:00
November	8.3	2.1	81	14	9:30

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Clermont-Ferrand, Lyon is 31 days earlier and Grenoble 1 day later.

City	Distance	Date	Difference
Saint-Étienne	109 km	14 June – 2 September	13 days earlier
Lyon	137 km	27 May – 10 September	31 days earlier
Limoges	141 km	6 June – 12 September	21 days earlier
Valence	171 km	29 May – 6 September	29 days earlier
Grenoble	216 km	28 June – 10 August	1 day later
Chambéry	222 km	3 June – 5 September	24 days earlier

Where to buy cucumber plants and seeds near Clermont-Ferrand

Buy plants ready to set out from 27 June to 28 August (from 6 June to 28 August for an unheated greenhouse); seed for raising your own is sown from 9 May to 31 July. Within 15 km of Clermont-Ferrand OpenStreetMap lists 13 garden centres, 7 farm-supply shops, 13 markets and 8 farm shops (collected 20 October 2026).

Gamm Vert — garden centre
Mon–Fri 09:00–12:00, 14:00–19:00; Sat 09:00–19:00 · 9 km
Gamm Vert — garden centre
Mon–Fri 09:00–12:00, Mon–Fri 14:00–19:00, Sat 09:00–19:00 · 12 km
Culture Indoor — garden centre
Avenue Ernest Cristal 88 A · 6 km
Market of Chamalières — market
Parking Square de Verdun, 63400 · Tue, Thu, Sat 07:30–13:00 · 1 km · ville-chamalieres.fr

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.

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