When to plant tomatoes in Tarija: 3 September – 21 February

In Tarija, tomato: sow for seedlings from 22 June to 31 December; plant into a greenhouse from 13 August to 21 February; plant out into open ground from 3 September to 21 February.

Tomato in Tarija: soil, season and weather

In Tarija frost, not soil, sets the date: the top 7 cm of soil warms to 15 °C — the minimum on the tomato card — around 26 July, 32 days before the last frost on 27 August, so planting waits only for the week after that frost.

Last spring frost	27 August
Top 7 cm of soil at 15 °C	26 July, 32 days before the last frost
Into an unheated greenhouse	13 August – 21 February; August outside: 6.4 °C at night, 22.7 °C by day; card 16–27 °C
First autumn frost	12 June, 283 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	12 November – 1 May
Days left for picking	213
Daylight	10:55 on 13 July, 11:43 on 3 September
Watering outdoors when fruiting (card)	every 3 days; the driest month, June, has 2 rainy days

Tomato in Tarija: care after planting

Planted on 3 September: in the first weeks water every 4 days.

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

3 September — feed: balanced (NPK)
1 October — 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 Tarija during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, October, averages 25.2 °C. Nights average below 16 °C in every month of the season, from 6.4 °C to 14.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
September	24.8	8.8	24	6	11:57
October	25.2	11.1	72	14	12:34
November	24.6	12.7	144	19	13:08
December	23.8	13.9	271	25	13:26
January	23.6	14.3	297	25	13:18
February	22.9	13.9	255	24	12:48
March	22.2	13.1	204	23	12:14
April	21.3	11.4	74	13	11:36
May	20.2	8.2	15	5	11:06
June	20.9	6.4	6	2	10:50

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around Tarija, Sucre is 22 days earlier and Potosí 86 days later.

City	Distance	Date	Difference
Potosí	241 km	from 28 November	86 days later
Sucre	283 km	12 August – 10 March	22 days earlier
San Salvador de Jujuy	301 km	25 August – 4 March	9 days earlier
Salta	369 km	11 September – 9 March	8 days later
Calama	445 km	from 17 August	17 days earlier
Oruro	467 km	3 October – 8 January	30 days later

Where to buy tomato plants and seeds near Tarija

Buy plants ready to set out from 3 September to 21 February (from 13 August to 21 February for an unheated greenhouse); seed for raising your own is sown from 22 June to 31 December. Within 15 km of Tarija OpenStreetMap lists 15 markets (collected 28 October 2026).

Mercado Negro — market
7:00 · 1 km
Tienda de Productos — market
Calle Juan de Dios Trigo, 0601 Tarija · 24/7 · 2 km
Mercado San Martín — market
Avenida La Banda, Tarija · 1 km
Mercado San Bernardo — market
Mon–Fri 06:00–20:00; Sat 06:00–14:00 · 1 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