When to plant watermelons in Teruel: 12 June – 29 July

In Teruel, watermelon: sow for seedlings from 24 April to 1 July; plant into a greenhouse from 22 May to 29 July; plant out into open ground from 12 June to 29 July.

Watermelon in Teruel: soil, season and weather

In Teruel the soil, not frost, sets the date: the last frost is over around 22 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 12 June, 51 days later.

Last spring frost	22 April
Top 7 cm of soil at 18 °C	12 June, 51 days after the last frost
Into an unheated greenhouse	22 May – 29 July; May outside: 5.8 °C at night, 18.5 °C by day; card 18–35 °C
First autumn frost	7 November, 148 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	10 August – 26 September
Days left for picking	89
Daylight	14:24 on 15 May, 15:01 on 12 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 4 rainy days

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

Watermelon in Teruel: care after planting

Planted on 12 June: in the first weeks water every 5 days.

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

12 June — 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 Teruel during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 28.4 °C. Months that stay below 18 °C even by day on average: October (17.6 °C) and November (10.3 °C). Nights average below 18 °C in every month of the season, from 1.6 °C to 13.8 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	24	10.7	47	7	15:02
July	28.4	13.6	22	4	14:47
August	28.1	13.8	22	5	13:48
September	22	9.9	35	7	12:30
October	17.6	6.6	43	6	11:11
November	10.3	1.6	43	7	9:58

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Teruel; the closest date is in Cuenca (Spain), 29 days earlier.

City	Distance	Date	Difference
Cuenca (Spain)	92 km	14 May – 4 August	29 days earlier
Castellón de la Plana	99 km	from 14 April	59 days earlier
Valencia	116 km	from 22 April	51 days earlier
Zaragoza	146 km	30 April – 10 September	43 days earlier
Tortosa	147 km	from 7 May	36 days earlier
Albacete	164 km	12 May – 17 August	31 days earlier

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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