When to plant watermelons in Toluca: 3 April – 15 September

In Toluca, watermelon: sow for seedlings from 13 February to 18 August; plant into a greenhouse from 13 March to 15 September; plant out into open ground from 3 April to 15 September.

Watermelon in Toluca: soil, season and weather

In Toluca the soil, not frost, sets the date: the last frost is over around 24 January, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 3 April, 69 days later.

Last spring frost	24 January
Top 7 cm of soil at 18 °C	3 April, 69 days after the last frost
Into an unheated greenhouse	13 March – 15 September; March outside: 6.5 °C at night, 21.4 °C by day; card 18–35 °C
First autumn frost	25 December, 266 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	1 June – 13 November
Days left for picking	207
Daylight	11:51 on 6 March, 12:22 on 3 April
Watering outdoors when fruiting (card)	every 5 days; the driest month, December, has 5 rainy days

The same dates in Toluca hold for Cucumber, Bell Pepper, Eggplant, Zucchini and Pumpkin.

Watermelon in Toluca: care after planting

Planted on 3 April: in the first weeks water every 5 days.

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

3 April — feed: balanced (NPK)

Pests and diseases of watermelon 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 Toluca during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, April, averages 22.4 °C. Months that stay below 18 °C even by day on average: July, September, October and December (17.3–17.9 °C). Nights average below 18 °C in every month of the season, from 4.7 °C to 9.5 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
April	22.4	7.9	31	9	12:34
May	22.3	9.1	89	15	13:02
June	20	9.5	210	19	13:17
July	17.9	8.8	170	25	13:11
August	18	8.9	184	23	12:48
September	17.9	9.1	224	21	12:16
October	17.9	7.8	104	14	11:43
November	18.2	6.1	36	6	11:14
December	17.3	4.7	18	5	10:59

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Toluca, Pachuca is 56 days earlier and Morelia 15 days later.

City	Distance	Date	Difference
Pachuca	135 km	6 February – 1 September	56 days earlier
Morelia	166 km	18 April – 12 September	15 days later
San Luis Potosí	347 km	7 March – 5 September	27 days earlier
Aguascalientes	397 km	8 February – 2 September	54 days earlier
Zacatecas	492 km	21 February – 17 August	41 days earlier
Saltillo	697 km	27 February – 17 August	35 days earlier

Where to buy watermelon plants and seeds near Toluca

Buy plants ready to set out from 3 April to 15 September (from 13 March to 15 September for an unheated greenhouse); seed for raising your own is sown from 13 February to 18 August. Within 15 km of Toluca OpenStreetMap lists 1 garden centre, 191 farm-supply shops, 1 plant nursery and 11 markets (collected 20 October 2026).

Villamar — market
6 km
Casa Blanca — market
6 km
Mercado Municipal Zinacantepec — market
8 km
Mercado Municipal — market
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.

Questions