GreenlyWhen to plant watermelons in Gandia: from 5 May
In Gandia, watermelon: sow for seedlings from 17 March; plant into a greenhouse from 14 April; plant out into open ground from 5 May. There is no autumn frost here, so the frost dates set no end to the window. For plants and seeds, the places nearby include Abonos E Insecticidas Salinas S L (farm supply, 14 km); addresses and opening hours are below.
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Watermelon in Gandia: soil, season and weather
In Gandia the soil, not frost, sets the date: the last frost is over around 18 January, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 5 May, 107 days later. Gandia has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 18 January |
|---|---|
| Top 7 cm of soil at 18 °C | 5 May, 107 days after the last frost |
| Into an unheated greenhouse | from 14 April; April outside: 10.2 °C at night, 18.3 °C by day; card 18–35 °C |
| Days in the bed to the first harvest (card) | 59 |
| First harvest, if planted in this window | from 3 July |
| Daylight | 12:52 on 7 April, 13:58 on 5 May |
| Watering outdoors when fruiting (card) | every 5 days; the driest month, July, has 3 rainy days |
The same dates in Gandia hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.
Watermelon in Gandia: care after planting
Planted on 5 May: in the first weeks water every 5 days.
Feeding, by the card’s schedule from that day:
- 5 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 Gandia during the watermelon season
No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 29.6 °C. Nights average below 18 °C in May (13.5 °C), June (17.9 °C) and October (14.5 °C).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| May | 22.1 | 13.5 | 35 | 6 | 14:17 |
| June | 26.8 | 17.9 | 21 | 3 | 14:53 |
| July | 29.6 | 20.8 | 12 | 3 | 14:39 |
| August | 29.6 | 21.1 | 22 | 4 | 13:43 |
| September | 25.7 | 18.1 | 101 | 8 | 12:29 |
| October | 22 | 14.5 | 67 | 7 | 11:14 |
ERA5 2016–2025, Open-Meteo
Watermelon in nearby cities
Around Gandia, Elche is 26 days earlier and Teruel 38 days later.
Where to buy watermelon plants and seeds near Gandia
Buy plants ready to set out from 5 May (from 14 April for an unheated greenhouse); seed for raising your own is sown from 17 March. Within 15 km of Gandia OpenStreetMap lists 1 garden centre, 1 farm-supply shop and 6 markets (collected 28 October 2026).
- Abonos E Insecticidas Salinas S L — farm supply
Avinguda de la Valldigna 77, 46760 Tavernes de la valldigna · 14 km - Mercadillo de Gandía — market
Passeig de les Germanies, 46702 Gandía · Sat 08:00–14:00 · 1 km · mercadillos.org - Ca La Ganya — market
Wed 18:00 · 3 km · ecoxarxasaforvall.wordpress.com - Mercat Municipal — market
Passeig de Lluís Vives, 46780 Oliva · 8 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow watermelon
- All frost dates and weather of Gandia
- Shops and markets: Gandia
- Selling a surplus in Spain
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant watermelons in Gandia?
In Gandia, watermelon: sow for seedlings from 17 March; plant into a greenhouse from 14 April; plant out into open ground from 5 May. There is no autumn frost here, so the frost dates set no end to the window.
When to sow watermelons for seedlings in Gandia?
Sow for seedlings from 17 March.
