When to plant watermelons in Lages: 24 September – 14 March

In Lages, watermelon: sow for seedlings from 6 August to 15 February; plant into a greenhouse from 3 September to 14 March; plant out into open ground from 24 September to 14 March.

Watermelon in Lages: soil, season and weather

In Lages the soil, not frost, sets the date: the last frost is over around 14 August, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 24 September, 41 days later.

Last spring frost	14 August
Top 7 cm of soil at 18 °C	24 September, 41 days after the last frost
Into an unheated greenhouse	3 September – 14 March; September outside: 11.3 °C at night, 20.6 °C by day; card 18–35 °C
First autumn frost	23 June, 273 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	22 November – 12 May
Days left for picking	214
Daylight	11:24 on 27 August, 12:09 on 24 September
Watering outdoors when fruiting (card)	every 5 days; the driest month, April, has 11 rainy days

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

Watermelon in Lages: care after planting

Planted on 24 September: in the first weeks water every 5 days.

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

24 September — 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 Lages during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 25.6 °C. Months that stay below 18 °C even by day on average: June (16.7 °C). Nights average below 18 °C in every month of the season, from 8.3 °C to 16.7 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
September	20.6	11.3	130	11	11:54
October	21.1	12.5	188	17	12:43
November	22.8	13.5	135	14	13:29
December	25	15.6	160	17	13:53
January	25.6	16.7	152	19	13:43
February	25.4	16.4	124	16	13:03
March	24.2	15.9	120	16	12:17
April	21.5	13.1	100	11	11:26
May	18.3	10.2	145	11	10:45
June	16.7	8.3	133	10	10:23

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

All the nearest cities on our list plant watermelon earlier than Lages; the closest date is in Guarapuava, 2 days earlier.

City	Distance	Date	Difference
Caxias do Sul	172 km	1 September – 7 March	23 days earlier
Passo Fundo	210 km	8 September – 8 March	16 days earlier
Chapecó	240 km	12 September – 14 March	12 days earlier
Curitiba	286 km	from 3 September	21 days earlier
Guarapuava	293 km	22 September – 14 March	2 days earlier
Ponta Grossa	304 km	4 September – 15 March	20 days earlier

Where to buy watermelon plants and seeds near Lages

Buy plants ready to set out from 24 September to 14 March (from 3 September to 14 March for an unheated greenhouse); seed for raising your own is sown from 6 August to 15 February. Within 15 km of Lages OpenStreetMap lists 3 markets (collected 27 October 2026).

Feira de Produtos — market
Sat 08:00–12:00 · 3 km
Mercado Público Municipal Osvaldo Uncini — market
1 km
Iega Hortifruti — market
3 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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