When to plant pumpkins in San Luis Potosí: 7 March – 20 August

In San Luis Potosí, pumpkin: sow for seedlings from 3 January to 9 July; plant into a greenhouse from 14 February to 20 August; plant out into open ground from 7 March to 20 August.

Pumpkin in San Luis Potosí: soil, season and weather

In San Luis Potosí frost, not soil, sets the date: the top 7 cm of soil warms to 18 °C — the minimum on the pumpkin card — around 9 February, 19 days 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 18 °C	9 February, 19 days before the last frost
First autumn frost	15 December, 283 days after the start
Days in the bed to the first harvest (card)	75
First harvest, if planted in this window	21 May – 3 November
Days left for picking	208
Daylight	11:02 on 24 January, 11:50 on 7 March
Watering outdoors when fruiting (card)	every 5 days; the driest month, March, has 1 rainy day

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

Pumpkin 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:

28 March — feed: nitrogen

Pests and diseases of pumpkin 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 pumpkin season

About 360 mm of rain falls in the season; March is the driest month (5 mm) and September the wettest (71 mm).

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

Pumpkin in nearby cities

Around San Luis Potosí, Pachuca is 29 days earlier and Morelia 42 days later.

City	Distance	Date	Difference
Aguascalientes	137 km	8 February – 17 August	27 days earlier
Zacatecas	178 km	21 February – 1 August	14 days earlier
Morelia	273 km	18 April – 27 August	42 days later
Pachuca	325 km	6 February – 16 August	29 days earlier
Toluca	347 km	3 April – 30 August	27 days later
Saltillo	365 km	27 February – 1 August	8 days earlier

Where to buy pumpkin plants and seeds near San Luis Potosí

Buy plants ready to set out from 7 March to 20 August (from 14 February to 20 August for an unheated greenhouse); seed for raising your own is sown from 3 January to 9 July. Within 15 km of San Luis Potosí OpenStreetMap lists 3 garden centres and 10 markets (collected 20 October 2026).

Bazaar Tangamanga — market
2 km
Mercado Revolución — market
2 km
Mercado Aviacion — market
3 km
Ecomercado — market
4 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.

Questions