When to plant watermelons in Mérida (Spain): 4 May – 9 September

In Mérida (Spain), watermelon: sow for seedlings from 16 March to 12 August; plant into a greenhouse from 13 April to 9 September; plant out into open ground from 4 May to 9 September. For plants and seeds, the places nearby include Frutas Selectas Cortijo (farm shop, 0 km); addresses and opening hours are below.

Watermelon in Mérida (Spain): soil, season and weather

In Mérida (Spain) the soil, not frost, sets the date: the last frost is over around 22 January, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 4 May, 102 days later.

Last spring frost	22 January
Top 7 cm of soil at 18 °C	4 May, 102 days after the last frost
Into an unheated greenhouse	13 April – 9 September; April outside: 9.4 °C at night, 21 °C by day; card 18–35 °C
First autumn frost	19 December, 229 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	2 July – 7 November
Days left for picking	170
Daylight	12:50 on 6 April, 13:55 on 4 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 1 rainy day

The same dates in Mérida (Spain) hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Mérida (Spain): care after planting

Planted on 4 May: in the first weeks water every 5 days.

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

4 May — 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 Mérida (Spain) during the watermelon season

Days average above the watermelon card's 18–35 °C in August (35.2 °C). Months that stay below 18 °C even by day on average: November (17.4 °C) and December (14.2 °C). Nights average below 18 °C in May, June and September–December (5.7–16.7 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	25.6	12.7	33	5	14:17
June	30.6	16.7	13	3	14:53
July	34.9	19.4	2	1	14:39
August	35.2	19.8	2	0	13:43
September	29.9	16.6	26	4	12:29
October	25.1	13.5	71	8	11:14
November	17.4	8.3	63	10	10:04
December	14.2	5.7	65	8	9:28

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Mérida (Spain), Beja is 17 days earlier and Cáceres 4 days later.

City	Distance	Date	Difference
Badajoz	56 km	3 May – 6 September	1 day earlier
Cáceres	62 km	8 May – 14 September	4 days later
Plasencia	125 km	8 May – 20 September	4 days later
Castelo Branco	141 km	30 April – 16 September	4 days earlier
Évora	142 km	from 5 May	1 day later
Beja	167 km	17 April – 18 September	17 days earlier

Where to buy watermelon plants and seeds near Mérida (Spain)

Buy plants ready to set out from 4 May to 9 September (from 13 April to 9 September for an unheated greenhouse); seed for raising your own is sown from 16 March to 12 August. Within 15 km of Mérida (Spain) OpenStreetMap lists 1 market and 1 farm shop (collected 28 October 2026).

Mercado de Calatrava — market
Calle Félix Valverde Lillo 10 · 1 km
Frutas Selectas Cortijo — farm shop
Avenida Juan Carlos I 25, 06800 Mérida · 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.

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