When to plant cucumbers in Caen: 15 June – 20 September

In Caen, cucumber: sow for seedlings from 27 April to 23 August; plant into a greenhouse from 25 May to 20 September; plant out into open ground from 15 June to 20 September. For plants and seeds, the places nearby include Jardinerie Christelle Legonin (garden centre, 6 km) and Truffaut (garden centre, 7 km); addresses and opening hours are below.

Cucumber in Caen: soil, season and weather

In Caen the soil, not frost, sets the date: the last frost is over around 12 March, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 15 June, 95 days later.

Last spring frost	12 March
Top 7 cm of soil at 18 °C	15 June, 95 days after the last frost
Into an unheated greenhouse	25 May – 20 September; May outside: 9.4 °C at night, 16.8 °C by day; card 18–25 °C
First autumn frost	5 December, 173 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	19 July – 24 October
Days left for picking	139
Daylight	15:25 on 18 May, 16:12 on 15 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, July, has 10 rainy days

The same dates in Caen hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in Caen: care after planting

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

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

22 June — 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 Caen 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 (16.8 °C), November (12 °C) and December (9.7 °C). Nights average below 18 °C in every month of the season, from 4.8 °C to 14.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.3	12.7	67	11	16:12
July	22.2	14.5	52	10	15:51
August	22.5	14.7	55	11	14:27
September	20.3	12.8	59	12	12:39
October	16.8	10.2	78	13	10:52
November	12	6.8	85	15	9:10
December	9.7	4.8	89	14	8:14

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Caen, Le Mans is 15 days earlier and Brighton 35 days later.

City	Distance	Date	Difference
Le Havre	48 km	11 June – 27 September	4 days earlier
Rouen	109 km	16 June – 6 September	1 day later
Le Mans	139 km	31 May – 9 September	15 days earlier
Rennes	154 km	1 June – 13 September	14 days earlier
Brighton	183 km	20 July – 16 September	35 days later
Portsmouth	188 km	16 June – 16 September	1 day later

Where to buy cucumber plants and seeds near Caen

Buy plants ready to set out from 15 June to 20 September (from 25 May to 20 September for an unheated greenhouse); seed for raising your own is sown from 27 April to 23 August. Within 15 km of Caen OpenStreetMap lists 14 garden centres, 1 farm-supply shop, 7 plant nurseries, 20 markets and 22 farm shops (collected 27 October 2026).

Truffaut — garden centre
Mon–Sat 09:30–19:00; Sun 09:30–18:30 · 7 km · truffaut.com
Pépinières Jamet — garden centre
Mon–Sat 10:00–12:00, 14:00–18:00 · 13 km · pepinieres-evrecy.fr
LaMaison.fr — garden centre
Mon–Sat 09:00–12:00, 14:00–19:00 · 15 km · lamaison.fr
Jardinerie Christelle Legonin — garden centre
Mon–Sat 09:00–20:00; Sun 09:00–19:00 · 6 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.

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