When to plant tomatoes in Ushuaia

In Ushuaia, tomato: sow for seedlings from 7 October; plant into a greenhouse from 28 November; plant out into open ground from 19 December. The frost-free season here is shorter than the 70 days the crop needs from planting to harvest (by its card): grow it in a greenhouse or choose an early variety.

Tomato in Ushuaia: soil, season and weather

In the median year the top 7 cm of soil in Ushuaia does not reach 15 °C, the minimum on the tomato card, before August; the date follows the last frost (12 December), and the bed stays cooler than the card asks. Only 38 days lie between planting out (19 December) and the first autumn frost (26 January), against the card's 70 days to the first harvest: even an unheated greenhouse, three weeks earlier, falls 11 days short without heat or a faster variety.

Last spring frost	12 December
Into an unheated greenhouse	from 28 November; November outside: 2 °C at night, 9 °C by day; card 16–27 °C
First autumn frost	26 January, 38 days after the start
Days in the bed to the first harvest (card)	70
Days left for picking	-32
Daylight	14:46 on 28 October, 17:19 on 19 December
Watering outdoors when fruiting (card)	every 3 days; the driest month, December, has 22 rainy days

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

Tomato in Ushuaia: care after planting

Planted on 19 December: in the first weeks water every 4 days.

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

19 December — feed: balanced (NPK)
16 January — feed: nitrogen

Pests and diseases of tomato 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 Ushuaia during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, January, averages 11 °C. Months that stay below 16 °C even by day on average: December (10.2 °C) and January (11 °C). Nights average below 16 °C in every month of the season, from 3.3 °C to 4.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
December	10.2	3.3	104	22	17:16
January	11	4.3	116	23	16:42

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

All the nearest cities on our list plant tomato earlier than Ushuaia; the closest date is in Coyhaique, 9 days earlier.

City	Distance	Date	Difference
Punta Arenas	250 km	4 November – 16 December	45 days earlier
Río Gallegos	360 km	17 November – 15 December	32 days earlier
Comodoro Rivadavia	997 km	15 October – 1 February	65 days earlier
Coyhaique	1,061 km	from 10 December	9 days earlier
Trelew	1,304 km	7 October – 6 February	73 days earlier
Puerto Montt	1,522 km	9 December – 14 February	10 days earlier

Where to buy tomato plants and seeds near Ushuaia

Buy plants ready to set out from 19 December (from 28 November for an unheated greenhouse); seed for raising your own is sown from 7 October. Within 15 km of Ushuaia OpenStreetMap lists 3 markets (collected 27 October 2026).

Mar de Cobos — market
2 km
Champita — market
2 km
Mercado De la Costa — market
6 km

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