When to plant watermelons in Fribourg: 21 June – 28 July

In Fribourg, watermelon: sow for seedlings from 3 May to 30 June; plant into a greenhouse from 31 May to 28 July; plant out into open ground from 21 June to 28 July.

Watermelon in Fribourg: soil, season and weather

In Fribourg the soil, not frost, sets the date: the last frost is over around 26 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 21 June, 56 days later.

Last spring frost	26 April
Top 7 cm of soil at 18 °C	21 June, 56 days after the last frost
Into an unheated greenhouse	31 May – 28 July; May outside: 6.8 °C at night, 14.7 °C by day; card 18–35 °C
First autumn frost	6 November, 138 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	19 August – 25 September
Days left for picking	79
Daylight	15:21 on 24 May, 15:52 on 21 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, October, has 13 rainy days

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

Watermelon in Fribourg: care after planting

Planted on 21 June: in the first weeks water every 5 days.

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

21 June — 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 Fribourg during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, July, averages 21.8 °C. Months that stay below 18 °C even by day on average: September (17.4 °C), October (13.5 °C) and November (7.4 °C). Nights average below 18 °C in every month of the season, from 0.9 °C to 13.1 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	20.2	11.7	190	19	15:50
July	21.8	13.1	179	18	15:31
August	21.8	13.1	142	15	14:15
September	17.4	9.7	132	14	12:37
October	13.5	6	120	13	10:58
November	7.4	0.9	121	15	9:25

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Fribourg, Basel is 16 days earlier and Sion 7 days later.

City	Distance	Date	Difference
Neuchâtel	27 km	6 June – 19 August	15 days earlier
Bern	28 km	21 June – 25 July	same day
Lausanne	50 km	19 June – 11 August	2 days earlier
Sion	65 km	28 June – 10 July	7 days later
Basel	91 km	5 June – 11 August	16 days earlier
Lucerne	92 km	28 June – 11 July	7 days later

Where to buy watermelon plants and seeds near Fribourg

Buy plants ready to set out from 21 June to 28 July (from 31 May to 28 July for an unheated greenhouse); seed for raising your own is sown from 3 May to 30 June. Within 15 km of Fribourg OpenStreetMap lists 8 garden centres, 1 plant nursery, 4 markets and 26 farm shops (collected 27 October 2026).

Art du jardin Zbinden SA — garden centre
2 km · zbinden-sa.com
Brülhart Baumschulen — garden centre
5 km
Brülhart Baumschulen — garden centre
7 km
Kaderli AG — plant nursery
6 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