When to plant watermelons in Ettelbruck: 6 June – 6 August

In Ettelbruck, watermelon: sow for seedlings from 18 April to 9 July; plant into a greenhouse from 16 May to 6 August; plant out into open ground from 6 June to 6 August. For plants and seeds, the places nearby include V-Shop (farm supply, 7 km) and Meyrishaff - Epicerie um Haff (farm shop, 7 km); addresses and opening hours are below.

Watermelon in Ettelbruck: soil, season and weather

In Ettelbruck the soil, not frost, sets the date: the last frost is over around 27 April, but the top 7 cm of soil reaches 18 °C — the minimum on the watermelon card — only around 6 June, 40 days later.

Last spring frost	27 April
Top 7 cm of soil at 18 °C	6 June, 40 days after the last frost
Into an unheated greenhouse	16 May – 6 August; May outside: 7.6 °C at night, 17.8 °C by day; card 18–35 °C
First autumn frost	15 November, 162 days after the start
Days in the bed to the first harvest (card)	59
First harvest, if planted in this window	4 August – 4 October
Days left for picking	103
Daylight	15:05 on 9 May, 16:10 on 6 June
Watering outdoors when fruiting (card)	every 5 days; the driest month, August, has 10 rainy days

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

Watermelon in Ettelbruck: care after planting

Planted on 6 June: in the first weeks water every 5 days.

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

6 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 Ettelbruck during the watermelon season

No month of the season averages above the watermelon card's 18–35 °C by day; the warmest, August, averages 23.5 °C. Months that stay below 18 °C even by day on average: October (14.5 °C) and November (8.3 °C). Nights average below 18 °C in every month of the season, from 2.8 °C to 13.3 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.4	12.1	77	12	16:19
July	23.2	12.9	67	11	15:56
August	23.5	13.3	61	10	14:30
September	19.5	10	76	10	12:40
October	14.5	7.2	86	13	10:50
November	8.3	2.8	80	13	9:06

ERA5 2016–2025, Open-Meteo

Watermelon in nearby cities

Around Ettelbruck, Saarbrücken is 3 days earlier and Esch-sur-Alzette 9 days later.

City	Distance	Date	Difference
Luxembourg	27 km	7 June – 9 August	1 day later
Esch-sur-Alzette	40 km	15 June – 9 August	9 days later
Metz	81 km	4 June – 8 August	2 days earlier
Saarbrücken	93 km	3 June – 9 August	3 days earlier
Liège	95 km	4 June – 10 August	2 days earlier
Namur	111 km	11 June – 6 August	5 days later

Where to buy watermelon plants and seeds near Ettelbruck

Buy plants ready to set out from 6 June to 6 August (from 16 May to 6 August for an unheated greenhouse); seed for raising your own is sown from 18 April to 9 July. Within 15 km of Ettelbruck OpenStreetMap lists 2 garden centres, 2 farm-supply shops, 3 plant nurseries, 3 markets and 2 farm shops (collected 27 October 2026).

V-Shop — farm supply
Rue des Prés 30, 9371 Gilsdorf · 7 km · de-verband.lu
Wochemaart — market
Tue 08:00–12:00 · 5 km · visit-diekirch.lu
Marché mensuel — market
Tue[3] 08:00–15:00 · 5 km
Meyrishaff - Epicerie um Haff — farm shop
Tue–Fri 09:00–12:00, 13:00–18:30; Sat 09:00–12:00, 13:00–17:00; Mon, public holidays closed · 7 km · meyrishaff.lu

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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