When to plant tomatoes in Gijón: 13 May – 27 August

In Gijón, tomato: sow for seedlings from 1 March to 6 July; plant into a greenhouse from 22 April to 27 August; plant out into open ground from 13 May to 27 August. For plants and seeds, the places nearby include Dalpen (garden centre, 3 km) and La Cooperativa (garden centre, 4 km); addresses and opening hours are below.

Tomato in Gijón: soil, season and weather

In Gijón the soil, not frost, sets the date: the last frost is over around 26 January, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 13 May, 107 days later.

Last spring frost	26 January
Top 7 cm of soil at 15 °C	13 May, 107 days after the last frost
Into an unheated greenhouse	22 April – 27 August; April outside: 7.5 °C at night, 16.2 °C by day; card 16–27 °C
First autumn frost	17 December, 218 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	22 July – 5 November
Days left for picking	148
Daylight	12:13 on 22 March, 14:37 on 13 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 11 rainy days

Tomato in Gijón: care after planting

Planted on 13 May: in the first weeks water every 4 days.

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

13 May — feed: balanced (NPK)
10 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 Gijón during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 23.5 °C. Months that stay below 16 °C even by day on average: November (15.5 °C) and December (13.7 °C). Nights average below 16 °C in every month of the season, from 5.7 °C to 15.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.2	10.1	96	14	14:41
June	20.7	13.7	112	14	15:24
July	22.8	15.5	50	11	15:07
August	23.5	15.9	50	10	14:01
September	22	13.5	85	13	12:33
October	19.9	11.3	103	13	11:05
November	15.5	7.9	166	16	9:42
December	13.7	5.7	141	15	8:58

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Gijón, León (Spain) is 9 days earlier and Oviedo 14 days later.

City	Distance	Date	Difference
Oviedo	25 km	27 May – 16 August	14 days later
León (Spain)	105 km	4 May – 19 July	9 days earlier
Ponferrada	134 km	10 May – 7 August	3 days earlier
Lugo	165 km	15 May – 14 August	2 days later
Palencia	194 km	9 May – 23 July	4 days earlier
Burgos	208 km	15 May – 28 July	2 days later

Where to buy tomato plants and seeds near Gijón

Buy plants ready to set out from 13 May to 27 August (from 22 April to 27 August for an unheated greenhouse); seed for raising your own is sown from 1 March to 6 July. Within 15 km of Gijón OpenStreetMap lists 4 garden centres, 2 farm-supply shops, 1 plant nursery, 3 markets and 1 farm shop (collected 27 October 2026).

Dalpen — garden centre
Camín de La Braña a la Ctra. del Obispo · Mon–Sat 09:30–14:00; Mon–Fri 16:00–19:00 · 3 km · dalpen.com
Viveros Runza — garden centre
Camín de Runza, 33314 · 8 km · viverosrunza.com
La Cooperativa — garden centre
Mon–Sat 09:00–21:00 · 4 km
Mercado del Sur — market
Mon–Sat 08:00–20:00 · 0 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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