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When to plant watermelons in Comodoro Rivadavia: 1 November – 12 February

In Comodoro Rivadavia, watermelon: sow for seedlings from 13 September to 15 January; plant into a greenhouse from 11 October to 12 February; plant out into open ground from 1 November to 12 February. For plants and seeds, the places nearby include Deposito Rural (farm shop, 4 km); addresses and opening hours are below.

Watermelon in Comodoro Rivadavia: soil, season and weather

In Comodoro Rivadavia the soil, not frost, sets the date: the last frost is over around 10 September, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 1 November, 52 days later.

Last spring frost10 September
Top 7 cm of soil at 18 °C1 November, 52 days after the last frost
Into an unheated greenhouse11 October – 12 February; October outside: 8.2 °C at night, 18.9 °C by day; card 18–35 °C
First autumn frost23 May, 204 days after the start
Days in the bed to the first harvest (card)59
First harvest, if planted in this window30 December – 11 April
Days left for picking145
Daylight12:45 on 4 October, 14:13 on 1 November
Watering outdoors when fruiting (card)every 5 days; the driest month, November, has 2 rainy days

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

Watermelon in Comodoro Rivadavia: care after planting

Planted on 1 November: in the first weeks water every 5 days.

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

  • 1 November — 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 Comodoro Rivadavia during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 26.4 °C. Months that stay below 18 °C even by day on average: April (17.4 °C) and May (12.7 °C). Nights average below 18 °C in every month of the season, from 5.5 °C to 14.3 °C.

MonthDay, °CNight, °CRain, mmRainy daysDaylight on the 15th
November22.210.811214:51
December24.71322415:42
January26.414.315215:20
February25.413.916313:58
March21.911.649412:28
April17.48.638610:49
May12.75.52459:27

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Comodoro Rivadavia, Trelew is 10 days earlier and Bariloche 63 days later.

CityDistanceDateDifference
Trelew338 km22 October – 17 February10 days earlier
Coyhaique357 kmfrom 10 December39 days later
Bariloche607 kmfrom 3 January63 days later
Río Gallegos653 km12 December – 26 December41 days later
Puerto Montt656 km29 December – 25 February58 days later
Osorno745 km29 December – 21 February58 days later

Where to buy watermelon plants and seeds near Comodoro Rivadavia

Buy plants ready to set out from 1 November to 12 February (from 11 October to 12 February for an unheated greenhouse); seed for raising your own is sown from 13 September to 15 January. Within 15 km of Comodoro Rivadavia OpenStreetMap lists 2 plant nurseries, 1 market and 1 farm shop (collected 27 October 2026).

Places: © OpenStreetMap contributors, ODbL.

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

When to plant watermelons in Comodoro Rivadavia?

In Comodoro Rivadavia, watermelon: sow for seedlings from 13 September to 15 January; plant into a greenhouse from 11 October to 12 February; plant out into open ground from 1 November to 12 February.

When to sow watermelons for seedlings in Comodoro Rivadavia?

Sow for seedlings from 13 September to 15 January.

When is the last spring frost in Comodoro Rivadavia?

Last spring frost around 10 September, first autumn frost around 24 May.

Other crops in Comodoro Rivadavia, with their dates