When to plant watermelons in Palencia: 25 May – 3 August

In Palencia, watermelon: sow for seedlings from 6 April to 6 July; plant into a greenhouse from 4 May to 3 August; plant out into open ground from 25 May to 3 August.

Watermelon in Palencia: soil, season and weather

In Palencia the soil, not frost, sets the date: the last frost is over around 10 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 25 May, 45 days later.

Last spring frost	10 April
Top 7 cm of soil at 18 °C	25 May, 45 days after the last frost
Into an unheated greenhouse	4 May – 3 August; May outside: 8 °C at night, 21 °C by day; card 18–35 °C
First autumn frost	12 November, 171 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	23 July – 1 October
Days left for picking	112
Daylight	13:51 on 27 April, 14:51 on 25 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 2 rainy days

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

Watermelon in Palencia: care after planting

Planted on 25 May: in the first weeks water every 5 days.

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

25 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 Palencia during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 30.4 °C. Months that stay below 18 °C even by day on average: November (12.2 °C). Nights average below 18 °C in every month of the season, from 3.6 °C to 14.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	21	8	47	9	14:33
June	26.1	12.2	45	8	15:13
July	30.4	14.6	9	2	14:57
August	30.4	14.9	9	2	13:54
September	24.6	11.4	25	5	12:32
October	19.6	8.2	54	9	11:08
November	12.2	3.6	59	11	9:50

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Palencia, Zamora is 15 days earlier and Segovia 7 days later.

City	Distance	Date	Difference
Valladolid	43 km	15 May – 18 August	10 days earlier
Burgos	77 km	31 May – 8 August	6 days later
Aranda de Duero	78 km	31 May – 4 August	6 days later
León (Spain)	108 km	25 May – 30 July	same day
Zamora	115 km	10 May – 9 August	15 days earlier
Segovia	122 km	1 June – 30 July	7 days later

Where to buy watermelon plants and seeds near Palencia

Buy plants ready to set out from 25 May to 3 August (from 4 May to 3 August for an unheated greenhouse); seed for raising your own is sown from 6 April to 6 July. Within 15 km of Palencia OpenStreetMap lists 1 farm-supply shop and 5 markets (collected 27 October 2026).

Mercadillo del recinto ferial — market
Sun 09:00–14:00 · 0 km
Mercadillo de San Juanillo — market
Wed 09:00–14:00 · 1 km
Mercadillo del Paseo de la Julia — market
Tue 09:00–14:00 · 2 km
Mercado de Abastos — market
Mon–Sat 08:30–14:00 · 1 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