When to plant tomatoes in Copiapó: 9 August – 3 March

In Copiapó, tomato: sow for seedlings from 28 May to 11 January; plant into a greenhouse from 19 July to 3 March; plant out into open ground from 9 August to 3 March.

Tomato in Copiapó: soil, season and weather

In Copiapó the soil, not frost, sets the date: the last frost is over around 19 July, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 9 August, 21 days later.

Last spring frost	19 July
Top 7 cm of soil at 15 °C	9 August, 21 days after the last frost
Into an unheated greenhouse	19 July – 3 March; July outside: 8.3 °C at night, 18.9 °C by day; card 16–27 °C
First autumn frost	23 June, 319 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	18 October – 12 May
Days left for picking	249
Daylight	10:25 on 18 June, 11:00 on 9 August
Watering outdoors when fruiting (card)	every 3 days; the driest month, November, has 0 rainy days

Tomato in Copiapó: care after planting

Planted on 9 August: in the first weeks water every 4 days.

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

9 August — feed: balanced (NPK)
6 September — 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 Copiapó during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, February, averages 23.7 °C. Nights average below 16 °C in every month of the season, from 8.1 °C to 13.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
August	19.3	8.6	3	1	11:08
September	20.2	9.6	1	0	11:54
October	21.1	10.7	1	0	12:43
November	21.7	11.5	0	0	13:28
December	22.6	12.2	0	0	13:51
January	23.4	13.3	2	0	13:41
February	23.7	13.7	0	0	13:02
March	23	13.5	0	0	12:17
April	21.1	11.9	6	0	11:27
May	19.6	10.4	5	1	10:47
June	18.3	8.1	5	1	10:25

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Copiapó, San Fernando del Valle de Catamarca is 16 days earlier and Salta 33 days later.

City	Distance	Date	Difference
La Rioja	408 km	7 August – 23 February	2 days earlier
San Fernando del Valle de Catamarca	463 km	24 July – 8 March	16 days earlier
San Juan	495 km	29 August – 28 February	20 days later
San Miguel de Tucumán	510 km	from 16 August	7 days later
Calama	564 km	from 17 August	8 days later
Salta	569 km	11 September – 9 March	33 days later

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.

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