When to plant tomatoes in Jaca: 1 June – 11 July

In Jaca, tomato: sow for seedlings from 20 March to 20 May; plant into a greenhouse from 11 May to 11 July; plant out into open ground from 1 June to 11 July.

Tomato 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 15 °C — the minimum on the tomato card — only around 1 June, 29 days later.

Last spring frost	3 May
Top 7 cm of soil at 15 °C	1 June, 29 days after the last frost
Into an unheated greenhouse	11 May – 11 July; May outside: 5.1 °C at night, 17.4 °C by day; card 16–27 °C
First autumn frost	31 October, 152 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	10 August – 19 September
Days left for picking	82
Daylight	13:07 on 10 April, 15:05 on 1 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 6 rainy days

Tomato in Jaca: care after planting

Planted on 1 June: in the first weeks water every 4 days.

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

1 June — feed: balanced (NPK)
29 June — feed: nitrogen

Pests and diseases of tomato 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 tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 26.8 °C. Nights average below 16 °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

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Jaca; the closest date is in Pamplona, 18 days earlier.

City	Distance	Date	Difference
Huesca	47 km	1 May – 6 August	31 days earlier
Pau	86 km	4 May – 14 August	28 days earlier
Pamplona	94 km	14 May – 10 August	18 days earlier
Tudela	102 km	2 April – 17 August	60 days earlier
Zaragoza	104 km	2 April – 30 August	60 days earlier
Bayonne	129 km	19 April – 27 August	43 days earlier

Where to buy tomato plants and seeds near Jaca

Buy plants ready to set out from 1 June to 11 July (from 11 May to 11 July for an unheated greenhouse); seed for raising your own is sown from 20 March to 20 May. 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.

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