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When to plant watermelons in Coyhaique

In Coyhaique, watermelon: sow for seedlings from 22 October; plant into a greenhouse from 19 November; plant out into open ground from 10 December. The frost-free season here is shorter than the 59 days the crop needs from planting to harvest (by its card): grow it in a greenhouse or choose an early variety.

Watermelon in Coyhaique: soil, season and weather

In the median year the top 7 cm of soil in Coyhaique does not reach 18 °C, the minimum on the watermelon card, before August; the date follows the last frost (3 December), and the bed stays cooler than the card asks. Only 35 days lie between planting out (10 December) and the first autumn frost (14 January), against the card's 59 days to the first harvest: even an unheated greenhouse, three weeks earlier, falls 3 days short without heat or a faster variety.

Last spring frost3 December
Into an unheated greenhousefrom 19 November; November outside: 2.1 °C at night, 10.8 °C by day; card 18–35 °C
First autumn frost14 January, 35 days after the start
Days in the bed to the first harvest (card)59
Days left for picking-24
Daylight14:42 on 12 November, 15:36 on 10 December
Watering outdoors when fruiting (card)every 5 days; the driest month, January, has 13 rainy days

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

Watermelon in Coyhaique: care after planting

Planted on 10 December: in the first weeks water every 5 days.

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

  • 10 December — 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 Coyhaique during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 14.2 °C. Months that stay below 18 °C even by day on average: December (13 °C) and January (14.2 °C). Nights average below 18 °C in every month of the season, from 4.2 °C to 5 °C.

MonthDay, °CNight, °CRain, mmRainy daysDaylight on the 15th
December134.2991315:40
January14.25881315:17

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Coyhaique, Trelew is 49 days earlier and Bariloche 24 days later.

CityDistanceDateDifference
Comodoro Rivadavia357 km1 November – 12 February39 days earlier
Puerto Montt461 km29 December – 25 February19 days later
Bariloche495 kmfrom 3 January24 days later
Osorno563 km29 December – 21 February19 days later
Trelew595 km22 October – 17 February49 days earlier
Valdivia648 km11 December – 4 March1 day later

Where to buy watermelon plants and seeds near Coyhaique

Buy plants ready to set out from 10 December (from 19 November for an unheated greenhouse); seed for raising your own is sown from 22 October. Within 15 km of Coyhaique OpenStreetMap lists 3 markets (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant watermelons in Coyhaique?

In Coyhaique, watermelon: sow for seedlings from 22 October; plant into a greenhouse from 19 November; plant out into open ground from 10 December. The frost-free season here is shorter than the 59 days the crop needs from planting to harvest (by its card): grow it in a greenhouse or choose an early variety.

When to sow watermelons for seedlings in Coyhaique?

Sow for seedlings from 22 October.

When is the last spring frost in Coyhaique?

Last spring frost around 3 December, first autumn frost around 14 January.

Other crops in Coyhaique, with their dates