GreenlyWhen to plant tomatoes in Santarém: from 2 April
In Santarém, tomato: sow for seedlings from 19 January; plant into a greenhouse from 12 March; plant out into open ground from 2 April. There is no autumn frost here, so the frost dates set no end to the window. For plants and seeds, the places nearby include Plantiagro (farm supply, 7 km) and Agriloja (farm supply, 7 km); addresses and opening hours are below.
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Tomato in Santarém: soil, season and weather
In Santarém the soil, not frost, sets the date: the last frost is over around 15 January, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 2 April, 77 days later. Santarém has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 15 January |
|---|---|
| Top 7 cm of soil at 15 °C | 2 April, 77 days after the last frost |
| Into an unheated greenhouse | from 12 March; March outside: 8.8 °C at night, 18 °C by day; card 16–27 °C |
| Days in the bed to the first harvest (card) | 70 |
| First harvest, if planted in this window | from 11 June |
| Daylight | 10:30 on 9 February, 12:40 on 2 April |
| Watering outdoors when fruiting (card) | every 3 days; the driest month, August, has 1 rainy day |
Tomato in Santarém: 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:
- Bacterial canker of tomato
- Tomato leaf mould
- Late Blight
- Bacterial spot
- Fruit cracking
- Bacterial wilt (brown rot of potato)
Dates count from the first planting day of the window above; a later planting moves them by as many days.
Weather in Santarém during the tomato season
Days average above the tomato card's 16–27 °C in July (30.2 °C) and August (30.9 °C). Nights average below 16 °C in April (10.7 °C), May (13.3 °C) and June (15.7 °C).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| April | 20.5 | 10.7 | 79 | 11 | 13:13 |
| May | 24.2 | 13.3 | 44 | 6 | 14:19 |
| June | 26.7 | 15.7 | 21 | 5 | 14:55 |
| July | 30.2 | 17.6 | 4 | 1 | 14:41 |
| August | 30.9 | 18 | 3 | 1 | 13:44 |
ERA5 2016–2025, Open-Meteo
Tomato in nearby cities
Around Santarém, Beja is 12 days earlier and Leiria 7 days later.
Where to buy tomato plants and seeds near Santarém
Buy plants ready to set out from 2 April (from 12 March for an unheated greenhouse); seed for raising your own is sown from 19 January. Within 15 km of Santarém OpenStreetMap lists 3 farm-supply shops and 8 markets (collected 27 October 2026).
- Plantiagro — farm supply · sells seed
Zona Industrial de Almeirim 49, 2080-221 Almeirim · 7 km · plantiagro.pt - Agriloja — farm supply
EN 3, 2070-621 Cartaxo · Mon–Sat 08:30–19:30; public holidays 09:00–18:00 · 9 km · agriloja.pt - Agriloja — farm supply
Mon–Sat 08:30–19:30; public holidays 09:00–18:00 · 7 km · agriloja.pt - Mercado Municipal de Santarém — market
1 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow tomato
- All frost dates and weather of Santarém
- Shops and markets: Santarém
- Selling a surplus in Portugal
- When to plant tomatoes in Portugal
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant tomatoes in Santarém?
In Santarém, tomato: sow for seedlings from 19 January; plant into a greenhouse from 12 March; plant out into open ground from 2 April. There is no autumn frost here, so the frost dates set no end to the window.
When to sow tomatoes for seedlings in Santarém?
Sow for seedlings from 19 January.
