GreenlyWhen to plant watermelons in San Miguel de Tucumán: from 15 September
In San Miguel de Tucumán, watermelon: sow for seedlings from 28 July; plant into a greenhouse from 25 August; plant out into open ground from 15 September. There is no autumn frost here, so the frost dates set no end to the window. For plants and seeds, the places nearby include Alfredo Palacios (farm supply, 5 km); addresses and opening hours are below.
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Watermelon in San Miguel de Tucumán: soil, season and weather
In San Miguel de Tucumán the soil, not frost, sets the date: the last frost is over around 20 July, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 15 September, 57 days later. San Miguel de Tucumán has no autumn frost in the median year, so frost does not end the season.
| Last spring frost | 20 July |
|---|---|
| Top 7 cm of soil at 18 °C | 15 September, 57 days after the last frost |
| Into an unheated greenhouse | from 25 August; August outside: 8.4 °C at night, 21.3 °C by day; card 18–35 °C |
| Days in the bed to the first harvest (card) | 59 |
| First harvest, if planted in this window | from 13 November |
| Daylight | 11:13 on 18 August, 11:55 on 15 September |
| Watering outdoors when fruiting (card) | every 5 days; the driest month, September, has 4 rainy days |
The same dates in San Miguel de Tucumán hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.
Watermelon in San Miguel de Tucumán: care after planting
Planted on 15 September: in the first weeks water every 5 days.
Feeding, by the card’s schedule from that day:
- 15 September — feed: balanced (NPK)
Pests and diseases of watermelon 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 San Miguel de Tucumán during the watermelon season
No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 29.7 °C. Nights average below 18 °C in September (11.6 °C), October (14.6 °C) and November (17.3 °C).
| Month | Day, °C | Night, °C | Rain, mm | Rainy days | Daylight on the 15th |
|---|---|---|---|---|---|
| September | 24.8 | 11.6 | 28 | 4 | 11:55 |
| October | 26.8 | 14.6 | 81 | 10 | 12:42 |
| November | 28.8 | 17.3 | 137 | 12 | 13:26 |
| December | 29.4 | 19.1 | 156 | 13 | 13:49 |
| January | 29.7 | 20.2 | 231 | 16 | 13:39 |
| February | 28.6 | 19.7 | 204 | 15 | 13:00 |
ERA5 2016–2025, Open-Meteo
Watermelon in nearby cities
Around San Miguel de Tucumán, San Fernando del Valle de Catamarca is 16 days earlier and Córdoba 16 days later.
| City | Distance | Date | Difference |
|---|---|---|---|
| San Fernando del Valle de Catamarca | 193 km | 30 August – 19 March | 16 days earlier |
| Salta | 225 km | 26 September – 20 March | 11 days later |
| San Salvador de Jujuy | 291 km | 22 September – 15 March | 7 days later |
| La Rioja | 331 km | 30 August – 5 March | 16 days earlier |
| Copiapó | 510 km | 8 September – 14 March | 7 days earlier |
| Córdoba | 522 km | 1 October – 5 March | 16 days later |
Where to buy watermelon plants and seeds near San Miguel de Tucumán
Buy plants ready to set out from 15 September (from 25 August for an unheated greenhouse); seed for raising your own is sown from 28 July. Within 15 km of San Miguel de Tucumán OpenStreetMap lists 2 garden centres, 1 farm-supply shop and 6 markets (collected 20 October 2026).
- Mercado Dorrego — market
4 km - Mercofrut — market
7 km - Expo - Lugar de Exposiciones — market
4 km - Alfredo Palacios — farm supply
Alfredo Palacios 480, 4000 San Miguel de Tucumán · 5 km
Places: © OpenStreetMap contributors, ODbL.
- How to grow watermelon
- All frost dates and weather of San Miguel de Tucumán
- Shops and markets: San Miguel de Tucumán
- Selling a surplus in Argentina
- Moon planting calendar for November 2026
- How we calculate the dates
Questions
When to plant watermelons in San Miguel de Tucumán?
In San Miguel de Tucumán, watermelon: sow for seedlings from 28 July; plant into a greenhouse from 25 August; plant out into open ground from 15 September. There is no autumn frost here, so the frost dates set no end to the window.
When to sow watermelons for seedlings in San Miguel de Tucumán?
Sow for seedlings from 28 July.
