When to plant cucumbers in Jaca: 19 June – 16 August

In Jaca, cucumber: sow for seedlings from 1 May to 19 July; plant into a greenhouse from 29 May to 16 August; plant out into open ground from 19 June to 16 August.

Cucumber in Jaca: soil, season and weather

In Jaca the soil, not frost, sets the date: the last frost is over around 3 May, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 19 June, 47 days later.

Last spring frost	3 May
Top 7 cm of soil at 18 °C	19 June, 47 days after the last frost
Into an unheated greenhouse	29 May – 16 August; May outside: 5.1 °C at night, 17.4 °C by day; card 18–25 °C
First autumn frost	31 October, 134 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	23 July – 19 September
Days left for picking	100
Daylight	14:49 on 22 May, 15:18 on 19 June
Watering outdoors when fruiting (card)	every 2 days; the driest month, July, has 6 rainy days

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

Cucumber in Jaca: care after planting

Planted on 19 June: in the first weeks water every 4 days.

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

26 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 Jaca during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, August, averages 26.8 °C. Months that stay below 18 °C even by day on average: October (16.6 °C). Nights average below 18 °C in every month of the season, from 5.4 °C to 12.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.8	10	72	11	15:17
July	26.4	12.5	39	6	15:01
August	26.8	12.8	49	6	13:57
September	20.9	8.7	75	8	12:32
October	16.6	5.4	90	10	11:07

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

All the nearest cities on our list plant cucumber earlier than Jaca; the closest date is in Pau, 17 days earlier.

City	Distance	Date	Difference
Huesca	47 km	23 May – 11 September	27 days earlier
Pau	86 km	2 June – 19 September	17 days earlier
Pamplona	94 km	1 June – 15 September	18 days earlier
Tudela	102 km	6 May – 22 September	44 days earlier
Zaragoza	104 km	30 April – 5 October	50 days earlier
Bayonne	129 km	28 May – 2 October	22 days earlier

Where to buy cucumber plants and seeds near Jaca

Buy plants ready to set out from 19 June to 16 August (from 29 May to 16 August for an unheated greenhouse); seed for raising your own is sown from 1 May to 19 July. Within 15 km of Jaca OpenStreetMap lists 1 farm shop (collected 28 October 2026).

Comercial Agraria El Llano — farm shop
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