GreenlyWhen to plant tomatoes in Posadas: from 25 July
In Posadas, tomato: sow for seedlings from 13 May; plant into a greenhouse from 4 July; plant out into open ground from 25 July. There is no autumn frost here, so the frost dates set no end to the window. For plants and seeds, the places nearby include Vivero los Arandanos (garden centre, 1 km) and Vivero Fenix (garden centre, 2 km); addresses and opening hours are below.
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Tomato in Posadas: soil, season and weather
In Posadas frost, not soil, sets the date: the top 7 cm of soil warms to 15 °C — the minimum on the tomato card — around 9 July, 9 days before the last frost on 18 July, so planting waits only for the week after that frost. Posadas has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 18 July |
|---|---|
| Top 7 cm of soil at 15 °C | 9 July, 9 days before the last frost |
| Into an unheated greenhouse | from 4 July; July outside: 11.8 °C at night, 21.2 °C by day; card 16–27 °C |
| Days in the bed to the first harvest (card) | 70 |
| First harvest, if planted in this window | from 3 October |
| Daylight | 10:30 on 3 June, 10:42 on 25 July |
| Watering outdoors when fruiting (card) | every 3 days; the driest month, July, has 6 rainy days |
The same dates in Posadas hold for Cucumber, Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.
Tomato in Posadas: care after planting
Planted on 25 July: in the first weeks water every 4 days.
Feeding, by the card’s schedule from that day:
- 25 July — feed: balanced (NPK)
- 22 August — feed: nitrogen
Pests and diseases of tomato to watch for:
- Bacterial canker of tomato
- Tomato leaf mould
- Late Blight
- Bacterial spot
- Fruit cracking
- Bacterial wilt (brown rot of potato)
Dates count from the first planting day of the window above; a later planting moves them by as many days.
Weather in Posadas during the tomato season
Days average above the tomato card's 16–27 °C in November (28.8 °C) and December (30.7 °C). Nights average below 16 °C in July (11.8 °C), August (12.7 °C) and September (15.1 °C).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| July | 21.2 | 11.8 | 80 | 6 | 10:34 |
| August | 22.8 | 12.7 | 91 | 7 | 11:08 |
| September | 25.2 | 15.1 | 138 | 9 | 11:54 |
| October | 26.6 | 17 | 224 | 13 | 12:43 |
| November | 28.8 | 18.5 | 193 | 11 | 13:28 |
| December | 30.7 | 20.6 | 134 | 11 | 13:51 |
ERA5 2016–2025, Open-Meteo
Tomato in nearby cities
Around Posadas, Santa Maria is 2 days earlier and Chapecó 16 days later.
| City | Distance | Date | Difference |
|---|---|---|---|
| Santa Maria | 328 km | 23 July – 21 February | 2 days earlier |
| Chapecó | 328 km | 10 August – 3 March | 16 days later |
| Passo Fundo | 358 km | 26 July – 26 February | 1 day later |
| Cascavel | 365 km | 25 July – 8 March | same day |
| Rivera | 392 km | 6 August – 18 February | 12 days later |
| Tacuarembó | 480 km | 28 July – 22 February | 3 days later |
Where to buy tomato plants and seeds near Posadas
Buy plants ready to set out from 25 July (from 4 July for an unheated greenhouse); seed for raising your own is sown from 13 May. Within 15 km of Posadas OpenStreetMap lists 8 garden centres, 1 farm-supply shop, 3 plant nurseries and 24 markets (collected 27 October 2026).
- Vivero los Arandanos — garden centre
Avenida Santa Cruz, 3300 Posadas · 1 km - Vivero Fenix — garden centre
Avenida Quaranta 5373, 3300 Posadas · 2 km - Lluvia de Oro — garden centre
Avenida Monseñor de Andrea 5147, 3300 Posadas · 2 km - Centro de Interpretación y Vivero — garden centre
Diagonal 45, 3300 Posadas · 3 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow tomato
- All frost dates and weather of Posadas
- Shops and markets: Posadas
- Selling a surplus in Argentina
- When to plant tomatoes in Argentina
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant tomatoes in Posadas?
In Posadas, tomato: sow for seedlings from 13 May; plant into a greenhouse from 4 July; plant out into open ground from 25 July. There is no autumn frost here, so the frost dates set no end to the window.
When to sow tomatoes for seedlings in Posadas?
Sow for seedlings from 13 May.
