When to plant watermelons in Vitoria-Gasteiz: 4 June – 15 August

In Vitoria-Gasteiz, watermelon: sow for seedlings from 16 April to 18 July; plant into a greenhouse from 14 May to 15 August; plant out into open ground from 4 June to 15 August.

Watermelon in Vitoria-Gasteiz: soil, season and weather

In Vitoria-Gasteiz the soil, not frost, sets the date: the last frost is over around 6 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 4 June, 59 days later.

Last spring frost	6 April
Top 7 cm of soil at 18 °C	4 June, 59 days after the last frost
Into an unheated greenhouse	14 May – 15 August; May outside: 8.1 °C at night, 19.1 °C by day; card 18–35 °C
First autumn frost	24 November, 173 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	2 August – 13 October
Days left for picking	114
Daylight	14:19 on 7 May, 15:11 on 4 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, July, has 5 rainy days

The same dates in Vitoria-Gasteiz hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Vitoria-Gasteiz: care after planting

Planted on 4 June: in the first weeks water every 5 days.

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

4 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 Vitoria-Gasteiz during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 27.6 °C. Months that stay below 18 °C even by day on average: November (12.6 °C). Nights average below 18 °C in every month of the season, from 5.2 °C to 14.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	23.8	12.2	57	10	15:19
July	26.6	14	22	5	15:03
August	27.6	14.5	26	4	13:58
September	23.3	11.9	42	9	12:33
October	19.5	9.3	59	9	11:06
November	12.6	5.2	91	14	9:46

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Vitoria-Gasteiz, Logroño is 7 days earlier and San Sebastián 4 days later.

City	Distance	Date	Difference
Logroño	46 km	28 May – 25 August	7 days earlier
Bilbao	50 km	2 June – 16 September	2 days earlier
San Sebastián	77 km	8 June – 24 August	4 days later
Pamplona	84 km	1 June – 21 August	3 days earlier
Burgos	102 km	31 May – 8 August	4 days earlier
Bayonne	121 km	28 May – 7 September	7 days earlier

Where to buy watermelon plants and seeds near Vitoria-Gasteiz

Buy plants ready to set out from 4 June to 15 August (from 14 May to 15 August for an unheated greenhouse); seed for raising your own is sown from 16 April to 18 July. Within 15 km of Vitoria-Gasteiz OpenStreetMap lists 2 garden centres, 2 plant nurseries, 10 markets and 2 farm shops (collected 27 October 2026).

Mercado Hebillas Azoka — market
1 km
Sansomendiko azoka — market
3 km
Mercado Aránzazu — market
0 km
Mercado Gorbeia-Zaldiaran — market
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