When to plant cucumbers in Jaén: 26 April – 2 October

In Jaén, cucumber: sow for seedlings from 8 March to 4 September; plant into a greenhouse from 5 April to 2 October; plant out into open ground from 26 April to 2 October.

Cucumber in Jaén: soil, season and weather

In Jaén the soil, not frost, sets the date: the last frost is over around 9 February, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 26 April, 76 days later.

Last spring frost	9 February
Top 7 cm of soil at 18 °C	26 April, 76 days after the last frost
Into an unheated greenhouse	5 April – 2 October; April outside: 10.1 °C at night, 21.1 °C by day; card 18–25 °C
First autumn frost	17 December, 235 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	30 May – 5 November
Days left for picking	201
Daylight	12:29 on 29 March, 13:34 on 26 April
Watering outdoors when fruiting (card)	every 2 days; the driest month, July, has 1 rainy day

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

Cucumber in Jaén: care after planting

Planted on 26 April: in the first weeks water every 4 days.

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

3 May — 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 Jaén during the cucumber season

Days average above the cucumber card's 18–35 °C in July (36.4 °C) and August (36 °C). Months that stay below 18 °C even by day on average: November (17.4 °C) and December (14.8 °C). Nights average below 18 °C in April, May and September–December (6–17.8 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	21.1	10.1	59	9	13:09
May	26.1	13.7	35	5	14:12
June	31.7	18.4	15	3	14:46
July	36.4	21.9	2	1	14:32
August	36	22	5	1	13:39
September	30.1	17.8	22	4	12:28
October	25.2	14	47	6	11:16
November	17.4	8.6	63	9	10:09
December	14.8	6	50	8	9:34

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around Jaén, Écija is 17 days earlier and Granada 35 days later.

City	Distance	Date	Difference
Úbeda	46 km	7 May – 18 September	11 days later
Granada	68 km	31 May – 11 September	35 days later
Córdoba (Spain)	87 km	21 April – 13 October	5 days earlier
Écija	116 km	9 April – 13 October	17 days earlier
Ciudad Real	136 km	7 May – 13 September	11 days later
Lorca	184 km	18 April – 30 September	8 days earlier

Where to buy cucumber plants and seeds near Jaén

Buy plants ready to set out from 26 April to 2 October (from 5 April to 2 October for an unheated greenhouse); seed for raising your own is sown from 8 March to 4 September. Within 15 km of Jaén OpenStreetMap lists 2 garden centres, 3 farm-supply shops, 8 markets and 1 farm shop (collected 27 October 2026).

Mercado de San Francisco — market
Calle Los Álamos 10, 23004 Jaén · 0 km · mercadosanfranciscojaen.es
Mercado de Abastos Peñamefécit — market
Calle Alicante 1, 23006 Jaén · 1 km · mercadopenamefecit.es
Mercado de Abastos — market
Calle Carnicería 40, Pegalajar · 13 km
Mercado de Abastos — market
Avenida de Jaén, 23650 · 14 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