GreenlyWhen to plant watermelons in Maldonado: from 24 October
In Maldonado, watermelon: sow for seedlings from 5 September; plant into a greenhouse from 3 October; plant out into open ground from 24 October. There is no autumn frost here, so the frost dates set no end to the window. For plants and seeds, the places nearby include Explora Vivero (garden centre, 14 km) and Vivero (garden centre, 15 km); addresses and opening hours are below.
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Watermelon in Maldonado: soil, season and weather
In Maldonado the soil, not frost, sets the date: the last frost is over around 15 July, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 24 October, 101 days later. Maldonado has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 15 July |
|---|---|
| Top 7 cm of soil at 18 °C | 24 October, 101 days after the last frost |
| Into an unheated greenhouse | from 3 October; October outside: 12.4 °C at night, 19 °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 22 December |
| Daylight | 12:14 on 26 September, 13:15 on 24 October |
| Watering outdoors when fruiting (card) | every 5 days; the driest month, November, has 8 rainy days |
The same dates in Maldonado hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.
Watermelon in Maldonado: care after planting
Planted on 24 October: in the first weeks water every 5 days.
Feeding, by the card’s schedule from that day:
- 24 October — 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 Maldonado during the watermelon season
No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 26.2 °C. Nights average below 18 °C in October (12.4 °C), November (15 °C) and December (17.3 °C).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| October | 19 | 12.4 | 88 | 9 | 12:56 |
| November | 22.3 | 15 | 73 | 8 | 13:56 |
| December | 24.6 | 17.3 | 76 | 9 | 14:29 |
| January | 26.2 | 19.1 | 105 | 8 | 14:15 |
| February | 26 | 19.4 | 90 | 10 | 13:21 |
| March | 24.4 | 18.2 | 93 | 11 | 12:21 |
ERA5 2016–2025, Open-Meteo
Watermelon in nearby cities
Around Maldonado, Paysandú is 33 days earlier and Mar del Plata 19 days later.
| City | Distance | Date | Difference |
|---|---|---|---|
| Colonia del Sacramento | 269 km | from 15 October | 9 days earlier |
| La Plata | 274 km | 20 October – 7 March | 4 days earlier |
| Buenos Aires | 315 km | from 7 October | 17 days earlier |
| Tacuarembó | 367 km | 14 October – 4 March | 10 days earlier |
| Paysandú | 408 km | 21 September – 17 March | 33 days earlier |
| Mar del Plata | 416 km | from 12 November | 19 days later |
Where to buy watermelon plants and seeds near Maldonado
Buy plants ready to set out from 24 October (from 3 October for an unheated greenhouse); seed for raising your own is sown from 5 September. Within 15 km of Maldonado OpenStreetMap lists 13 garden centres, 2 plant nurseries, 8 markets and 1 farm shop (collected 27 October 2026).
- Explora Vivero — garden centre
Avenida José Frade, San Carlos · Mon–Sat 08:00–17:00 · 14 km · exploravivero.com - Vivero — garden centre
Mon, Thu–Sun 14:00–18:00 · 15 km - Predio Ferial Inve — market
Alfredo Chiossi esquina Héctor Gutierrez Ruiz, 20000 Maldonado · Wed 09:00–14:30 · 2 km - Galería Sagasti — market
Gorlero · 7 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow watermelon
- All frost dates and weather of Maldonado
- Shops and markets: Maldonado
- Selling a surplus in Uruguay
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant watermelons in Maldonado?
In Maldonado, watermelon: sow for seedlings from 5 September; plant into a greenhouse from 3 October; plant out into open ground from 24 October. There is no autumn frost here, so the frost dates set no end to the window.
When to sow watermelons for seedlings in Maldonado?
Sow for seedlings from 5 September.
