When to plant watermelons in Chapecó: 12 September – 14 March

In Chapecó, watermelon: sow for seedlings from 25 July to 15 February; plant into a greenhouse from 22 August to 14 March; plant out into open ground from 12 September to 14 March.

Watermelon in Chapecó: soil, season and weather

In Chapecó the soil, not frost, sets the date: the last frost is over around 3 August, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 12 September, 40 days later.

Last spring frost	3 August
Top 7 cm of soil at 18 °C	12 September, 40 days after the last frost
Into an unheated greenhouse	22 August – 14 March; August outside: 9.3 °C at night, 20.7 °C by day; card 18–35 °C
First autumn frost	23 June, 285 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	10 November – 12 May
Days left for picking	226
Daylight	11:08 on 15 August, 11:50 on 12 September
Watering outdoors when fruiting (card)	every 5 days; the driest month, April, has 10 rainy days

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

Watermelon in Chapecó: care after planting

Planted on 12 September: in the first weeks water every 5 days.

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

12 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 Chapecó during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, January, averages 27.1 °C. Nights average below 18 °C in every month of the season, from 9.4 °C to 17.9 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
September	23.5	12.5	127	11	11:55
October	23.8	13.7	230	16	12:42
November	25.4	14.6	144	12	13:27
December	26.8	16.7	157	15	13:50
January	27.1	17.9	170	18	13:40
February	26.7	17.2	130	16	13:01
March	25.9	16.2	144	15	12:17
April	23.6	13.7	117	10	11:28
May	20.2	10.9	210	12	10:48
June	18.6	9.4	166	10	10:26

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Chapecó, Cascavel is 49 days earlier and Lages 12 days later.

City	Distance	Date	Difference
Passo Fundo	131 km	8 September – 8 March	4 days earlier
Guarapuava	222 km	22 September – 14 March	10 days later
Lages	240 km	24 September – 14 March	12 days later
Cascavel	252 km	25 July – 19 March	49 days earlier
Caxias do Sul	270 km	1 September – 7 March	11 days earlier
Santa Maria	310 km	14 August – 3 March	29 days earlier

Where to buy watermelon plants and seeds near Chapecó

Buy plants ready to set out from 12 September to 14 March (from 22 August to 14 March for an unheated greenhouse); seed for raising your own is sown from 25 July to 15 February. Within 15 km of Chapecó OpenStreetMap lists 5 garden centres, 3 farm-supply shops, 1 plant nursery, 7 markets and 1 farm shop (collected 27 October 2026).

Feira Comercial Chapecó — market
Travessa Brasil · 1 km
Mercadinho da Baixada — market
Rua Dom Lombardi 64 · 4 km
Floricultura Fumagalli — garden centre
2 km
Hortilet Agropecuária — garden centre
1 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