When to plant tomatoes in Chillán: 21 October – 20 February

In Chillán, tomato: sow for seedlings from 9 August to 30 December; plant into a greenhouse from 30 September to 20 February; plant out into open ground from 21 October to 20 February.

Tomato in Chillán: soil, season and weather

In Chillán the soil, not frost, sets the date: the last frost is over around 30 August, but the top 7 cm of soil reaches 15 °C — the minimum on the tomato card — only around 21 October, 52 days later.

Last spring frost	30 August
Top 7 cm of soil at 15 °C	21 October, 52 days after the last frost
Into an unheated greenhouse	30 September – 20 February; September outside: 5.8 °C at night, 16.4 °C by day; card 16–27 °C
First autumn frost	11 June, 234 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	30 December – 30 April
Days left for picking	164
Daylight	11:14 on 30 August, 13:12 on 21 October
Watering outdoors when fruiting (card)	every 3 days; the driest month, February, has 1 rainy day

Tomato in Chillán: care after planting

Planted on 21 October: in the first weeks water every 4 days.

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

21 October — feed: balanced (NPK)
18 November — 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 Chillán during the tomato season

Days average above the tomato card's 16–27 °C in December (27.6 °C), January (29.7 °C) and February (29.6 °C). Months that stay below 16 °C even by day on average: May (15.2 °C) and June (12.8 °C). Nights average below 16 °C in every month of the season, from 5.2 °C to 13.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
October	19.3	7.3	53	7	12:59
November	23.6	9.9	37	4	14:04
December	27.6	12	12	3	14:38
January	29.7	13.7	14	2	14:23
February	29.6	13.9	7	1	13:26
March	26	11.6	23	2	12:22
April	20.2	9	78	7	11:10
May	15.2	6.5	134	10	10:12
June	12.8	5.2	234	13	9:40

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Chillán, Talca is 6 days earlier and Temuco 34 days later.

City	Distance	Date	Difference
Concepción	88 km	8 November – 21 February	18 days later
Los Ángeles	98 km	30 October – 9 February	9 days later
Talca	138 km	15 October – 21 February	6 days earlier
Curicó	196 km	15 October – 15 February	6 days earlier
Temuco	241 km	24 November – 31 January	34 days later
Rancagua	298 km	17 October – 20 February	4 days earlier

Where to buy tomato plants and seeds near Chillán

Buy plants ready to set out from 21 October to 20 February (from 30 September to 20 February for an unheated greenhouse); seed for raising your own is sown from 9 August to 30 December. Within 15 km of Chillán OpenStreetMap lists 4 markets (collected 27 October 2026).

Mercado Persa San Rafael — market
Avenida Los Puelches 1697, Chillán · 2 km
Mercado Municipal de Chillán — market
0 km
Mercado de Chillán — market
0 km
Persa Cordillera — market
2 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