When to plant watermelons in Zamora: 10 May – 9 August

In Zamora, watermelon: sow for seedlings from 22 March to 12 July; plant into a greenhouse from 19 April to 9 August; plant out into open ground from 10 May to 9 August. For plants and seeds, the places nearby include Hermanos Neches (farm shop, 1 km) and José Antonio Herrero Rivas (farm shop, 1 km); addresses and opening hours are below.

Watermelon in Zamora: soil, season and weather

In Zamora the soil, not frost, sets the date: the last frost is over around 3 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 10 May, 37 days later.

Last spring frost	3 April
Top 7 cm of soil at 18 °C	10 May, 37 days after the last frost
Into an unheated greenhouse	19 April – 9 August; April outside: 5.7 °C at night, 18.1 °C by day; card 18–35 °C
First autumn frost	18 November, 192 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	8 July – 7 October
Days left for picking	133
Daylight	13:10 on 12 April, 14:20 on 10 May
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 2 rainy days

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

Watermelon in Zamora: care after planting

Planted on 10 May: in the first weeks water every 5 days.

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

10 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 Zamora during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 31.7 °C. Months that stay below 18 °C even by day on average: November (13.3 °C). Nights average below 18 °C in every month of the season, from 4.5 °C to 16.2 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	22.8	9.4	33	7	14:30
June	27.5	13.5	30	6	15:10
July	31.7	16.2	8	2	14:54
August	31.7	16.2	5	2	13:53
September	25.8	12.3	23	3	12:31
October	20.6	9.1	62	8	11:09
November	13.3	4.5	54	10	9:53

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon later than Zamora; the closest date is in Valladolid, 5 days later.

City	Distance	Date	Difference
Salamanca	60 km	25 May – 14 August	15 days later
Valladolid	86 km	15 May – 18 August	5 days later
Bragança	91 km	29 May – 17 August	19 days later
Palencia	115 km	25 May – 3 August	15 days later
León (Spain)	122 km	25 May – 30 July	15 days later
Ávila	129 km	31 May – 8 August	21 days later

Where to buy watermelon plants and seeds near Zamora

Buy plants ready to set out from 10 May to 9 August (from 19 April to 9 August for an unheated greenhouse); seed for raising your own is sown from 22 March to 12 July. Within 15 km of Zamora OpenStreetMap lists 1 garden centre, 4 farm-supply shops, 1 plant nursery, 2 markets and 2 farm shops (collected 27 October 2026).

Mercado de Abastos Provisional de Zamora — market
Calle de Santiago Alba Bonifaz · 0 km
Hermanos Neches — farm shop
Calle de la Puentica 11, 49031 Zamora · 1 km
José Antonio Herrero Rivas — farm shop
Calle del Obispo Nieto 29B, 49031 Zamora · 1 km
Centro de Recuperación de Animales Silvestres — garden centre
7 km · patrimonionatural.org

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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