When to plant watermelons in Plasencia: 8 May – 20 September

In Plasencia, watermelon: sow for seedlings from 20 March to 23 August; plant into a greenhouse from 17 April to 20 September; plant out into open ground from 8 May to 20 September.

Watermelon in Plasencia: soil, season and weather

In Plasencia the soil, not frost, sets the date: the last frost is over around 7 February, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 8 May, 90 days later.

Last spring frost	7 February
Top 7 cm of soil at 18 °C	8 May, 90 days after the last frost
Into an unheated greenhouse	17 April – 20 September; April outside: 9.3 °C at night, 19.4 °C by day; card 18–35 °C
First autumn frost	30 December, 236 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	6 July – 18 November
Days left for picking	177
Daylight	13:02 on 10 April, 14:09 on 8 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 1 rainy day

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

Watermelon in Plasencia: care after planting

Planted on 8 May: in the first weeks water every 5 days.

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

8 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 Plasencia during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 34.4 °C. Months that stay below 18 °C even by day on average: November (15.5 °C) and December (12.7 °C). Nights average below 18 °C in May, June and September–December (5.5–17.1 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	24.1	12.9	49	6	14:22
June	29.4	17.1	25	4	15:00
July	34.2	20.6	3	1	14:45
August	34.4	21.1	4	1	13:47
September	28.2	16.8	47	5	12:30
October	22.9	13.4	114	9	11:12
November	15.5	8	111	12	9:59
December	12.7	5.5	95	9	9:21

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Plasencia, Castelo Branco is 8 days earlier and Guarda 20 days later.

City	Distance	Date	Difference
Cáceres	66 km	8 May – 14 September	same day
Talavera de la Reina	108 km	9 May – 8 September	1 day later
Salamanca	111 km	25 May – 14 August	17 days later
Guarda	115 km	28 May – 16 August	20 days later
Castelo Branco	122 km	30 April – 16 September	8 days earlier
Mérida (Spain)	125 km	4 May – 9 September	4 days earlier

Where to buy watermelon plants and seeds near Plasencia

Buy plants ready to set out from 8 May to 20 September (from 17 April to 20 September for an unheated greenhouse); seed for raising your own is sown from 20 March to 23 August. Within 15 km of Plasencia OpenStreetMap lists 2 garden centres and 1 market (collected 28 October 2026).

Viveros Sor Valentina — garden centre
1 km
JARDINTEC Jardinería Técnica Norte Extremeña — garden centre
2 km
Plaza de Abastos — 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