When to plant cucumbers in San Rafael: 22 September – 20 March

In San Rafael, cucumber: sow for seedlings from 4 August to 21 February; plant into a greenhouse from 1 September to 20 March; plant out into open ground from 22 September to 20 March. For plants and seeds, the places nearby include Vivero Cedro Azul (garden centre, 2 km); addresses and opening hours are below.

Cucumber in San Rafael: soil, season and weather

In San Rafael the soil, not frost, sets the date: the last frost is over around 23 August, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 22 September, 30 days later.

Last spring frost	23 August
Top 7 cm of soil at 18 °C	22 September, 30 days after the last frost
Into an unheated greenhouse	1 September – 20 March; September outside: 7.4 °C at night, 21.4 °C by day; card 18–25 °C
First autumn frost	4 June, 256 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	26 October – 23 April
Days left for picking	222
Daylight	11:07 on 25 August, 12:06 on 22 September
Watering outdoors when fruiting (card)	every 2 days; the driest month, June, has 2 rainy days

The same dates in San Rafael hold for Bell Pepper, Eggplant, Zucchini, Pumpkin and Watermelon.

Cucumber in San Rafael: care after planting

Planted on 22 September: in the first weeks water every 4 days.

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

29 September — feed: nitrogen

Pests and diseases of cucumber 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 Rafael during the cucumber season

No month of the season averages above the cucumber card's 18–35 °C by day; the warmest, January, averages 31.6 °C. Months that stay below 18 °C even by day on average: May (17.1 °C) and June (14.4 °C). Nights average below 18 °C in March–June and September–December (2.8–17.3 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
September	21.4	7.4	12	2	11:51
October	24.2	10.3	47	5	12:55
November	28.3	14.5	32	5	13:55
December	31	17.3	26	5	14:27
January	31.6	19	52	8	14:13
February	30.4	18	44	7	13:21
March	26.9	14.9	35	5	12:20
April	22	10.7	29	4	11:14
May	17.1	6.6	32	5	10:20
June	14.4	2.8	9	2	9:51

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around San Rafael, Mendoza is 3 days earlier and Rancagua 45 days later.

City	Distance	Date	Difference
Mendoza	198 km	19 September – 1 April	3 days earlier
Rancagua	226 km	6 November – 27 March	45 days later
San Luis	238 km	25 September – 7 April	3 days later
Santiago	251 km	14 October – 2 April	22 days later
Curicó	268 km	31 October – 22 March	39 days later
Talca	314 km	6 November – 28 March	45 days later

Where to buy cucumber plants and seeds near San Rafael

Buy plants ready to set out from 22 September to 20 March (from 1 September to 20 March for an unheated greenhouse); seed for raising your own is sown from 4 August to 21 February. Within 15 km of San Rafael OpenStreetMap lists 1 garden centre, 1 market and 1 farm shop (collected 28 October 2026).

Vivero Cedro Azul — garden centre
Marcelino Champagnat 435, 5600 · 2 km
La Lili — market
Lassa, 5600 · Tue–Sun 09:00–21:00 · 7 km
Finca Rubio — farm shop
11 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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