When to plant tomatoes in Santiago de Compostela: 14 May – 27 August

In Santiago de Compostela, tomato: sow for seedlings from 2 March to 6 July; plant into a greenhouse from 23 April to 27 August; plant out into open ground from 14 May to 27 August. For plants and seeds, the places nearby include Labralia Santiago (farm supply, 1 km) and Agrícola Jorge (farm supply, 3 km); addresses and opening hours are below.

Tomato in Santiago de Compostela: soil, season and weather

In Santiago de Compostela the soil, not frost, sets the date: the last frost is over around 6 February, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 14 May, 97 days later.

Last spring frost	6 February
Top 7 cm of soil at 15 °C	14 May, 97 days after the last frost
Into an unheated greenhouse	23 April – 27 August; April outside: 7.4 °C at night, 15.9 °C by day; card 16–27 °C
First autumn frost	17 December, 217 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	23 July – 5 November
Days left for picking	147
Daylight	12:16 on 23 March, 14:35 on 14 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, July, has 6 rainy days

Tomato in Santiago de Compostela: care after planting

Planted on 14 May: in the first weeks water every 4 days.

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

14 May — feed: balanced (NPK)
11 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 Santiago de Compostela during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 24.5 °C. Months that stay below 16 °C even by day on average: November (13.9 °C) and December (12.2 °C). Nights average below 16 °C in every month of the season, from 6 °C to 14.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.6	9.8	101	12	14:38
June	20.8	12.5	78	12	15:20
July	23.7	14.3	29	6	15:03
August	24.5	14.8	33	6	13:58
September	21.7	13.2	80	11	12:33
October	18.6	11.2	205	15	11:06
November	13.9	7.8	193	17	9:46
December	12.2	6	215	16	9:03

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Santiago de Compostela, Vigo is 39 days earlier and Lugo 1 day later.

City	Distance	Date	Difference
Pontevedra	51 km	from 21 April	23 days earlier
A Coruña	54 km	from 8 May	6 days earlier
Vigo	74 km	from 5 April	39 days earlier
Lugo	80 km	15 May – 14 August	1 day later
Ourense	81 km	12 May – 13 August	2 days earlier
Viana do Castelo	135 km	2 May – 22 August	12 days earlier

Where to buy tomato plants and seeds near Santiago de Compostela

Buy plants ready to set out from 14 May to 27 August (from 23 April to 27 August for an unheated greenhouse); seed for raising your own is sown from 2 March to 6 July. Within 15 km of Santiago de Compostela OpenStreetMap lists 8 garden centres, 11 farm-supply shops, 4 plant nurseries and 4 markets (collected 28 October 2026).

Oforno Garden — garden centre
Rúa do País Vasco 27, 15705 Santiago de Compostela · Mon–Sat 10:00–21:00 · 4 km · ofornogarden.com
Viveiros Gastrar — plant nursery
Mon–Fri 09:00–13:30, 15:00–20:00; Sat 09:00–13:00 · 10 km · viveirosgastrar.com
Labralia Santiago — farm supply
Rúa da Ponte de Sar 34, 15702 Santiago de Compostela · 1 km
Agrícola Jorge — farm supply
Rúa da Torreira 11, 15898 Santiago de Compostela · 3 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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