When to plant tomatoes in Guarda: 9 May – 5 August

In Guarda, tomato: sow for seedlings from 25 February to 14 June; plant into a greenhouse from 18 April to 5 August; plant out into open ground from 9 May to 5 August.

Tomato in Guarda: soil, season and weather

In Guarda the soil, not frost, sets the date: the last frost is over around 2 April, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 9 May, 37 days later.

Last spring frost	2 April
Top 7 cm of soil at 15 °C	9 May, 37 days after the last frost
Into an unheated greenhouse	18 April – 5 August; April outside: 5.2 °C at night, 14.6 °C by day; card 16–27 °C
First autumn frost	25 November, 200 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	18 July – 14 October
Days left for picking	130
Daylight	12:02 on 18 March, 14:13 on 9 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 1 rainy day

Tomato in Guarda: care after planting

Planted on 9 May: in the first weeks water every 4 days.

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

9 May — feed: balanced (NPK)
6 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 Guarda during the tomato season

Days average above the tomato card's 16–27 °C in July (27.8 °C) and August (28.4 °C). Months that stay below 16 °C even by day on average: November (11.3 °C). Nights average below 16 °C in every month of the season, from 4.6 °C to 14.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.8	8.2	51	8	14:25
June	23	11.8	43	8	15:03
July	27.8	14.5	6	2	14:48
August	28.4	14.9	4	1	13:49
September	22.8	11.7	39	6	12:30
October	18.2	9.4	109	11	11:11
November	11.3	4.6	100	12	9:57

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Guarda; the closest date is in Viseu, 12 days earlier.

City	Distance	Date	Difference
Viseu	56 km	27 April – 20 August	12 days earlier
Castelo Branco	82 km	2 April – 5 September	37 days earlier
Vila Real	93 km	13 April – 1 September	26 days earlier
Coimbra	105 km	from 9 April	30 days earlier
Plasencia	115 km	16 April – 9 September	23 days earlier
Porto	132 km	15 April – 29 August	24 days earlier

Where to buy tomato plants and seeds near Guarda

Buy plants ready to set out from 9 May to 5 August (from 18 April to 5 August for an unheated greenhouse); seed for raising your own is sown from 25 February to 14 June. Within 15 km of Guarda OpenStreetMap lists 2 markets (collected 27 October 2026).

Mercado Municipal da Guarda — market
1 km
Mercado Municipal de S. Miguel da Guarda — market
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.

Questions