When to plant cucumbers in San Antonio: 28 February – 20 September

In San Antonio, cucumber: sow for seedlings from 10 January to 23 August; plant into a greenhouse from 7 February to 20 September; plant out into open ground from 28 February to 20 September. For plants and seeds, the places nearby include Madrigal Fruit Stand (farm shop, 12 km); addresses and opening hours are below.

Cucumber in San Antonio: soil, season and weather

In San Antonio the soil, not frost, sets the date: the last frost is over around 10 February, but the top 7 cm of soil reaches 18 °C — the minimum on the cucumber card — only around 28 February, 18 days later.

Last spring frost	10 February
Top 7 cm of soil at 18 °C	28 February, 18 days after the last frost
Into an unheated greenhouse	7 February – 20 September; February outside: 8.8 °C at night, 20.4 °C by day; card 18–25 °C
First autumn frost	5 December, 280 days after the start
Days in the bed to the first harvest (card)	34
First harvest, if planted in this window	3 April – 24 October
Days left for picking	246
Daylight	10:46 on 31 January, 11:31 on 28 February
Watering outdoors when fruiting (card)	every 2 days; the driest month, December, has 8 rainy days

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

Cucumber in San Antonio: care after planting

Planted on 28 February: in the first weeks water every 4 days.

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

7 March — 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 Antonio during the cucumber season

Days average above the cucumber card's 18–35 °C in July (35.1 °C) and August (35.5 °C). Nights average below 18 °C in February–April and October–December (8.8–17.7 °C).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
February	20.4	8.8	59	8	11:09
March	25.2	13.5	65	11	11:58
April	27.8	16.3	94	12	12:52
May	30.7	20.1	167	16	13:37
June	34	23.2	80	12	14:01
July	35.1	24.3	85	8	13:52
August	35.5	24.7	88	9	13:13
September	32.4	22.4	107	9	12:22
October	28.5	17.7	80	8	11:30
November	22.4	12.5	67	9	10:42
December	19.3	9.3	57	8	10:16

ERA5 2016–2025, Open-Meteo

Cucumber in nearby cities

Around San Antonio, Reynosa is 30 days earlier and Fort Worth 22 days later.

City	Distance	Date	Difference
Austin	119 km	3 March – 28 September	3 days later
Corpus Christi	215 km	5 February – 8 October	23 days earlier
Nuevo Laredo	238 km	3 February – 8 October	25 days earlier
Houston	304 km	24 February – 12 September	4 days earlier
Reynosa	371 km	29 January – 8 October	30 days earlier
Fort Worth	385 km	22 March – 15 September	22 days later

Where to buy cucumber plants and seeds near San Antonio

Buy plants ready to set out from 28 February to 20 September (from 7 February to 20 September for an unheated greenhouse); seed for raising your own is sown from 10 January to 23 August. Within 15 km of San Antonio OpenStreetMap lists 3 garden centres, 4 markets and 1 farm shop (collected 20 October 2026).

Market Square — market
West Commerce Street 514, 78207 San Antonio · 1 km · getcreativesanantonio.com
Mi Mercado — market
New Laredo Hwy 227, San Antonio · 7 km
Pearl Farmer's Market — market
Sat 09:00–13:00; Wed 16:00–19:00 · 3 km
Madrigal Fruit Stand — farm shop
Southton Road 9607, 78223 San Antonio · Thu 11:00–20:00; Fri–Sat 11:00–21:00; Sun 11:00–19:00 · 12 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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