When to plant tomatoes in Castelo Branco: 2 April – 5 September

In Castelo Branco, tomato: sow for seedlings from 19 January to 15 July; plant into a greenhouse from 12 March to 5 September; plant out into open ground from 2 April to 5 September. For plants and seeds, the places nearby include Agriloja (farm supply, 4 km); addresses and opening hours are below.

Tomato in Castelo Branco: soil, season and weather

In Castelo Branco the soil, not frost, sets the date: the last frost is over around 17 January, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 2 April, 75 days later.

Last spring frost	17 January
Top 7 cm of soil at 15 °C	2 April, 75 days after the last frost
Into an unheated greenhouse	12 March – 5 September; March outside: 7.3 °C at night, 17.8 °C by day; card 16–27 °C
First autumn frost	26 December, 268 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	11 June – 14 November
Days left for picking	198
Daylight	10:28 on 9 February, 12:41 on 2 April
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 1 rainy day

Tomato in Castelo Branco: care after planting

Planted on 2 April: in the first weeks water every 4 days.

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

2 April — feed: balanced (NPK)
30 April — 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 Castelo Branco during the tomato season

Days average above the tomato card's 16–27 °C in June–September (29.5–35.1 °C). Months that stay below 16 °C even by day on average: December (14.7 °C). Nights average below 16 °C in April, May and October–December (6.5–13.7 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	21	9.6	77	11	13:14
May	25.5	12.8	46	6	14:21
June	29.8	16.1	32	5	14:59
July	34.6	18.9	3	1	14:44
August	35.1	19.2	2	1	13:46
September	29.5	16.4	36	5	12:30
October	24.7	13.7	84	9	11:12
November	17.4	8.9	103	11	10:00
December	14.7	6.5	93	9	9:22

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

1 of the nearest cities share Castelo Branco's date.

City	Distance	Date	Difference
Guarda	82 km	9 May – 5 August	37 days later
Coimbra	91 km	from 9 April	7 days later
Viseu	100 km	27 April – 20 August	25 days later
Cáceres	103 km	15 April – 3 September	13 days later
Leiria	113 km	from 9 April	7 days later
Badajoz	114 km	2 April – 26 August	same day

Where to buy tomato plants and seeds near Castelo Branco

Buy plants ready to set out from 2 April to 5 September (from 12 March to 5 September for an unheated greenhouse); seed for raising your own is sown from 19 January to 15 July. Within 15 km of Castelo Branco OpenStreetMap lists 1 garden centre, 2 farm-supply shops and 2 markets (collected 27 October 2026).

Agriloja — farm supply
Rua R LT 32, 6000-790 Castelo Branco · Mon–Sat 08:30–20:00; Sun 09:00–13:00 · 4 km · agriloja.pt
A Minha Planta — garden centre
3 km
Quinta do Claude Chão da Raia — farm supply
15 km
Campo da Feira — market
1 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