When to plant watermelons in Beja: 17 April – 18 September

In Beja, watermelon: sow for seedlings from 27 February to 21 August; plant into a greenhouse from 27 March to 18 September; plant out into open ground from 17 April to 18 September. For plants and seeds, the places nearby include Agro Happy (farm supply, 1 km) and Agriloja (farm supply, 2 km); addresses and opening hours are below.

Watermelon in Beja: soil, season and weather

In Beja the soil, not frost, sets the date: the last frost is over around 6 February, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 17 April, 70 days later.

Last spring frost	6 February
Top 7 cm of soil at 18 °C	17 April, 70 days after the last frost
Into an unheated greenhouse	27 March – 18 September; March outside: 8 °C at night, 19 °C by day; card 18–35 °C
First autumn frost	28 December, 255 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	15 June – 16 November
Days left for picking	196
Daylight	12:07 on 20 March, 13:14 on 17 April
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 1 rainy day

The same dates in Beja hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Beja: care after planting

Planted on 17 April: in the first weeks water every 5 days.

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

17 April — feed: balanced (NPK)

Pests and diseases of watermelon 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 Beja during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 35 °C. Months that stay below 18 °C even by day on average: December (16.4 °C). Nights average below 18 °C in April–June and September–December (7.2–16.9 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	21.9	10.3	55	10	13:10
May	26.8	13.3	30	5	14:13
June	30.8	16.4	12	3	14:47
July	34.8	18.6	1	1	14:34
August	35	19	1	0	13:40
September	30.3	16.9	26	3	12:28
October	25.9	14.3	57	7	11:16
November	19.1	9.7	60	9	10:08
December	16.4	7.2	61	8	9:33

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Beja, Seville is 15 days earlier and Santarém 19 days later.

City	Distance	Date	Difference
Évora	62 km	from 5 May	18 days later
Badajoz	124 km	3 May – 6 September	16 days later
Santarém	154 km	from 6 May	19 days later
Mérida (Spain)	167 km	4 May – 9 September	17 days later
Seville	179 km	from 2 April	15 days earlier
Castelo Branco	204 km	30 April – 16 September	13 days later

Where to buy watermelon plants and seeds near Beja

Buy plants ready to set out from 17 April to 18 September (from 27 March to 18 September for an unheated greenhouse); seed for raising your own is sown from 27 February to 21 August. Within 15 km of Beja OpenStreetMap lists 3 farm-supply shops and 3 markets (collected 27 October 2026).

Agriloja — farm supply
Mon–Sat 08:30–20:00 · 2 km · agriloja.pt
Agro Happy — farm supply
Avenida Miguel Fernandes 19, 7800-396 · 1 km
Fertigal — farm supply
2 km
Mercado Municipal de Beja — market
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.

Questions