When to plant eggplants in Río Cuarto: 29 September – 22 February

In Río Cuarto, eggplant: sow for seedlings from 10 July to 24 December; plant into a greenhouse from 8 September to 22 February; plant out into open ground from 29 September to 22 February.

Eggplant in Río Cuarto: soil, season and weather

In Río Cuarto the soil, not frost, sets the date: the last frost is over around 15 August, but the top 7 cm of soil reaches 18 °C — the minimum on the eggplant card — only around 29 September, 45 days later.

Last spring frost	15 August
Top 7 cm of soil at 18 °C	29 September, 45 days after the last frost
Into an unheated greenhouse	8 September – 22 February; September outside: 9.6 °C at night, 21.3 °C by day; card 21–29 °C
First autumn frost	13 June, 258 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	8 December – 2 May
Days left for picking	188
Daylight	10:29 on 31 July, 12:20 on 29 September
Watering outdoors when fruiting (card)	every 3 days; the driest month, June, has 2 rainy days

The same dates in Río Cuarto hold for Cucumber, Bell Pepper, Zucchini, Pumpkin and Watermelon.

Eggplant in Río Cuarto: care after planting

Planted on 29 September: in the first weeks water every 4 days.

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

29 September — feed: balanced (NPK)
27 October — feed: nitrogen

Pests and diseases of eggplant 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 Río Cuarto during the eggplant season

Days average above the eggplant card's 21–29 °C in December (29.6 °C) and January (29.7 °C). Months that stay below 21 °C even by day on average: May (18.1 °C) and June (15.5 °C). Nights average below 21 °C in every month of the season, from 5.9 °C to 19.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
September	21.3	9.6	24	4	11:52
October	24.1	12.4	91	9	12:52
November	27.4	15.8	81	9	13:49
December	29.6	18	74	9	14:19
January	29.7	19.3	113	11	14:06
February	28.3	18.5	96	9	13:16
March	26.1	16.7	106	10	12:20
April	22.3	13.2	68	8	11:17
May	18.1	9.2	28	5	10:26
June	15.5	5.9	14	2	9:58

ERA5 2016–2025, Open-Meteo

Eggplant in nearby cities

Around Río Cuarto, Paraná is 19 days earlier and Santa Rosa 23 days later.

City	Distance	Date	Difference
San Luis	184 km	25 September – 2 March	4 days earlier
Córdoba	191 km	1 October – 23 February	2 days later
Rosario	346 km	29 September – 23 February	same day
Santa Fe	379 km	from 20 September	9 days earlier
Santa Rosa	388 km	22 October – 21 February	23 days later
Paraná	391 km	from 10 September	19 days earlier

Where to buy eggplant plants and seeds near Río Cuarto

Buy plants ready to set out from 29 September to 22 February (from 8 September to 22 February for an unheated greenhouse); seed for raising your own is sown from 10 July to 24 December. Within 15 km of Río Cuarto OpenStreetMap lists 2 garden centres, 1 plant nursery, 3 markets and 1 farm shop (collected 27 October 2026).

La esquina — market
4 km
El jilguero — farm shop
7 km
Punta del agua — market
Avenida Marcelo T. de Alvear, 5800 · 4 km
Unigarden — garden centre
5 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.

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