When to plant watermelons in Úbeda: 7 May – 24 August

In Úbeda, watermelon: sow for seedlings from 19 March to 27 July; plant into a greenhouse from 16 April to 24 August; plant out into open ground from 7 May to 24 August. For plants and seeds, the places nearby include Agroquímicos Úbeda (farm supply, 2 km) and Agronos (farm supply, 2 km); addresses and opening hours are below.

Watermelon in Úbeda: soil, season and weather

In Úbeda the soil, not frost, sets the date: the last frost is over around 25 February, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 7 May, 71 days later.

Last spring frost	25 February
Top 7 cm of soil at 18 °C	7 May, 71 days after the last frost
Into an unheated greenhouse	16 April – 24 August; April outside: 8.3 °C at night, 20.3 °C by day; card 18–35 °C
First autumn frost	3 December, 210 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	5 July – 22 October
Days left for picking	151
Daylight	12:56 on 9 April, 13:58 on 7 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 1 rainy day

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

Watermelon in Úbeda: care after planting

Planted on 7 May: in the first weeks water every 5 days.

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

7 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 Úbeda during the watermelon season

Days average above the watermelon card's 18–35 °C in July (36.3 °C) and August (35.9 °C). Months that stay below 18 °C even by day on average: November (16.5 °C) and December (13.5 °C). Nights average below 18 °C in May, June and September–December (3.6–17.5 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	25.6	12.3	35	5	14:13
June	31.5	17.5	16	3	14:47
July	36.3	21.1	1	1	14:34
August	35.9	21	3	1	13:40
September	29.8	16.6	23	3	12:28
October	24.6	12.2	43	7	11:16
November	16.5	6.4	56	9	10:08
December	13.5	3.6	48	7	9:33

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Úbeda, Lorca is 19 days earlier and Granada 24 days later.

City	Distance	Date	Difference
Jaén	46 km	26 April – 7 September	11 days earlier
Granada	94 km	31 May – 17 August	24 days later
Ciudad Real	119 km	7 May – 19 August	same day
Córdoba (Spain)	123 km	21 April – 18 September	16 days earlier
Lorca	151 km	18 April – 5 September	19 days earlier
Alcázar de San Juan	154 km	30 April – 23 August	7 days earlier

Where to buy watermelon plants and seeds near Úbeda

Buy plants ready to set out from 7 May to 24 August (from 16 April to 24 August for an unheated greenhouse); seed for raising your own is sown from 19 March to 27 July. Within 15 km of Úbeda OpenStreetMap lists 3 garden centres, 8 farm-supply shops, 1 plant nursery and 8 markets (collected 28 October 2026).

Agronos — farm supply
Calle Santa Eulalia 16, 23400 Úbeda · 2 km
SAGRICAM — farm supply
Calle de Canena 31, Rus · 10 km
Agroquímicos Úbeda — farm supply
Calle Floristería, 23400 Úbeda · 2 km
Mercado de Abastos — market
Plaza de Gallego Díaz 1, 23400 Úbeda · 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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