When to plant watermelons in Curicó: 31 October – 26 February

In Curicó, watermelon: sow for seedlings from 12 September to 29 January; plant into a greenhouse from 10 October to 26 February; plant out into open ground from 31 October to 26 February.

Watermelon in Curicó: soil, season and weather

In Curicó the soil, not frost, sets the date: the last frost is over around 25 August, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 31 October, 67 days later.

Last spring frost	25 August
Top 7 cm of soil at 18 °C	31 October, 67 days after the last frost
Into an unheated greenhouse	10 October – 26 February; October outside: 7.8 °C at night, 20.8 °C by day; card 18–35 °C
First autumn frost	6 June, 219 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	29 December – 25 April
Days left for picking	160
Daylight	12:30 on 3 October, 13:29 on 31 October
Watering outdoors when fruiting (card)	every 5 days; the driest month, December, has 1 rainy day

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

Watermelon in Curicó: care after planting

Planted on 31 October: in the first weeks water every 5 days.

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

31 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 Curicó during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 30.6 °C. Months that stay below 18 °C even by day on average: May (16 °C) and June (13.2 °C). Nights average below 18 °C in every month of the season, from 4.6 °C to 14.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
October	20.8	7.8	38	5	12:56
November	25.6	10.6	19	3	13:57
December	29.1	13	4	1	14:29
January	30.6	14.7	11	1	14:15
February	30.3	14.4	7	1	13:22
March	27.4	12.1	7	1	12:21
April	21.3	9.2	59	4	11:14
May	16	6.8	87	7	10:19
June	13.2	4.6	189	10	9:49

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Curicó, Santiago is 17 days earlier and Concepción 36 days later.

City	Distance	Date	Difference
Talca	61 km	6 November – 3 March	6 days later
Rancagua	102 km	6 November – 2 March	6 days later
Santiago	179 km	14 October – 8 March	17 days earlier
Chillán	196 km	14 November – 2 March	14 days later
Valparaíso	219 km	from 29 October	2 days earlier
Concepción	262 km	6 December – 3 March	36 days later

Where to buy watermelon plants and seeds near Curicó

Buy plants ready to set out from 31 October to 26 February (from 10 October to 26 February for an unheated greenhouse); seed for raising your own is sown from 12 September to 29 January. Within 15 km of Curicó OpenStreetMap lists 1 plant nursery, 8 markets and 1 farm shop (collected 28 October 2026).

Vivero Tripan — plant nursery
7 km
Centro Comercial Las Palmas — market
1 km
Felicur — market
1 km
Feria — 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