When to plant watermelons in Tacuarembó: 14 October – 4 March

In Tacuarembó, watermelon: sow for seedlings from 26 August to 5 February; plant into a greenhouse from 23 September to 4 March; plant out into open ground from 14 October to 4 March.

Watermelon in Tacuarembó: soil, season and weather

In Tacuarembó the soil, not frost, sets the date: the last frost is over around 21 July, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 14 October, 85 days later.

Last spring frost	21 July
Top 7 cm of soil at 18 °C	14 October, 85 days after the last frost
Into an unheated greenhouse	23 September – 4 March; September outside: 10.3 °C at night, 20.2 °C by day; card 18–35 °C
First autumn frost	13 June, 243 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	12 December – 2 May
Days left for picking	184
Daylight	11:54 on 16 September, 12:48 on 14 October
Watering outdoors when fruiting (card)	every 5 days; the driest month, June, has 8 rainy days

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

Watermelon in Tacuarembó: care after planting

Planted on 14 October: in the first weeks water every 5 days.

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

14 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 Tacuarembó during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 29.5 °C. Months that stay below 18 °C even by day on average: June (17 °C). Nights average below 18 °C in March–June and October–December (8.3–17.2 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
October	22.8	12.2	118	9	12:50
November	26	14.7	106	8	13:44
December	28.4	17.2	104	8	14:12
January	29.5	19	108	9	14:00
February	29	18.8	102	10	13:13
March	26.8	16.9	122	9	12:19
April	23.4	14.1	161	10	11:20
May	18.9	10.5	114	9	10:31
June	17	8.3	93	8	10:05

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Tacuarembó, Santa Maria is 61 days earlier and Maldonado 10 days later.

City	Distance	Date	Difference
Rivera	99 km	28 September – 29 February	16 days earlier
Salto	191 km	from 22 August	53 days earlier
Paysandú	209 km	21 September – 17 March	23 days earlier
Santa Maria	307 km	14 August – 3 March	61 days earlier
Colonia del Sacramento	352 km	from 15 October	1 day later
Maldonado	367 km	from 24 October	10 days later

Where to buy watermelon plants and seeds near Tacuarembó

Buy plants ready to set out from 14 October to 4 March (from 23 September to 4 March for an unheated greenhouse); seed for raising your own is sown from 26 August to 5 February. Within 15 km of Tacuarembó OpenStreetMap lists 1 plant nursery (collected 28 October 2026).

Nursery — plant nursery
11 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