When to plant tomatoes in San Luis Potosí: 7 March – 25 August

In San Luis Potosí, tomato: sow for seedlings from 24 December to 4 July; plant into a greenhouse from 14 February to 25 August; plant out into open ground from 7 March to 25 August. For plants and seeds, the places nearby include Savia Forestal Jardinera Integral (garden centre, 2 km); addresses and opening hours are below.

Tomato in San Luis Potosí: soil, season and weather

In San Luis Potosí frost, not soil, sets the date: the top 7 cm of soil averages 15 °C — the minimum on the tomato card — already in the first week of January, before the last frost on 28 February, so planting waits only for the week after that frost.

Last spring frost	28 February
Top 7 cm of soil at 15 °C	already in the first week of January
Into an unheated greenhouse	14 February – 25 August; February outside: 8.6 °C at night, 24.7 °C by day; card 16–27 °C
First autumn frost	15 December, 283 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	16 May – 3 November
Days left for picking	213
Daylight	10:55 on 14 January, 11:50 on 7 March
Watering outdoors when fruiting (card)	every 3 days; the driest month, March, has 1 rainy day

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

Tomato in San Luis Potosí: care after planting

Planted on 7 March: in the first weeks water every 4 days.

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

7 March — feed: balanced (NPK)
4 April — feed: nitrogen

Pests and diseases of tomato 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 Luis Potosí during the tomato season

Days average above the tomato card's 16–27 °C in March–June and August (27.1–30.6 °C). Nights average below 16 °C in every month of the season, from 8 °C to 15.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
March	27.8	10.5	5	1	12:00
April	29.6	12.9	14	4	12:39
May	30.6	15.1	35	6	13:11
June	27.8	15.5	64	13	13:29
July	26.7	15	61	10	13:22
August	27.1	15.1	49	8	12:55
September	25.5	14.6	71	12	12:17
October	24.5	12.4	35	7	11:40
November	23.5	9.8	16	3	11:05
December	21.9	8	10	2	10:47

ERA5 2016–2025, Open-Meteo

Tomato in nearby cities

Around San Luis Potosí, Aguascalientes is 53 days earlier and Morelia 2 days later.

City	Distance	Date	Difference
Aguascalientes	137 km	13 January – 22 August	53 days earlier
Zacatecas	178 km	5 February – 6 August	30 days earlier
Morelia	273 km	9 March – 1 September	2 days later
Pachuca	325 km	6 February – 21 August	29 days earlier
Toluca	347 km	27 February – 4 September	8 days earlier
Saltillo	365 km	27 February – 6 August	8 days earlier

Where to buy tomato plants and seeds near San Luis Potosí

Buy plants ready to set out from 7 March to 25 August (from 14 February to 25 August for an unheated greenhouse); seed for raising your own is sown from 24 December to 4 July. Within 15 km of San Luis Potosí OpenStreetMap lists 3 garden centres and 10 markets (collected 20 October 2026).

Savia Forestal Jardinera Integral — garden centre
Avenida Tatanacho 725 · 2 km
Mercado San Luis 400 — market
Avenida Coronel Romero 400, 78280 San Luis Potosí · 1 km
Mercado Camilo Arriaga — market
Avenida Reforma, 78339 San Luis Potosí · 0 km
El paraíso de las Palmas — 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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