When to plant watermelons in Écija: 9 April – 18 September

In Écija, watermelon: sow for seedlings from 19 February to 21 August; plant into a greenhouse from 19 March to 18 September; plant out into open ground from 9 April to 18 September.

Watermelon in Écija: soil, season and weather

In Écija the soil, not frost, sets the date: the last frost is over around 25 January, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 9 April, 74 days later.

Last spring frost	25 January
Top 7 cm of soil at 18 °C	9 April, 74 days after the last frost
Into an unheated greenhouse	19 March – 18 September; March outside: 8.2 °C at night, 19.8 °C by day; card 18–35 °C
First autumn frost	28 December, 263 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	7 June – 16 November
Days left for picking	204
Daylight	11:47 on 12 March, 12:55 on 9 April
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 0 rainy days

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

Watermelon in Écija: care after planting

Planted on 9 April: in the first weeks water every 5 days.

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

9 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 Écija during the watermelon season

Days average above the watermelon card's 18–35 °C in July (37.4 °C) and August (37.4 °C). Months that stay below 18 °C even by day on average: December (16.5 °C). Nights average below 18 °C in April, May and October–December (6.4–15 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	22.9	10.9	52	7	13:09
May	28.2	14.4	34	5	14:10
June	33.3	18.6	13	1	14:44
July	37.4	21.6	1	0	14:31
August	37.4	22.1	7	1	13:38
September	31.8	18.4	22	3	12:28
October	27	15	60	7	11:16
November	19.6	9.4	69	7	10:10
December	16.5	6.4	58	7	9:35

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Écija, Seville is 7 days earlier and Granada 52 days later.

City	Distance	Date	Difference
Córdoba (Spain)	48 km	21 April – 18 September	12 days later
Seville	81 km	from 2 April	7 days earlier
Jaén	116 km	26 April – 7 September	17 days later
Jerez de la Frontera	133 km	from 18 April	9 days later
Granada	137 km	31 May – 17 August	52 days later
Úbeda	159 km	7 May – 24 August	28 days later

Where to buy watermelon plants and seeds near Écija

Buy plants ready to set out from 9 April to 18 September (from 19 March to 18 September for an unheated greenhouse); seed for raising your own is sown from 19 February to 21 August. Within 15 km of Écija OpenStreetMap lists 1 market (collected 28 October 2026).

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