When to plant zucchini in Luxembourg: 7 June – 1 September

In Luxembourg, zucchini: sow for seedlings from 26 April to 11 August; plant into a greenhouse from 17 May to 1 September; plant out into open ground from 7 June to 1 September. For plants and seeds, the places nearby include Biohaff Clees (farm shop, 6 km) and Les paniers de Sandrine (farm shop, 10 km); addresses and opening hours are below.

Zucchini in Luxembourg: soil, season and weather

In Luxembourg the soil, not frost, sets the date: the last frost is over around 15 April, but the top 7 cm of soil reaches 18 °C — the minimum on the zucchini card — only around 7 June, 53 days later.

Last spring frost	15 April
Top 7 cm of soil at 18 °C	7 June, 53 days after the last frost
First autumn frost	18 November, 164 days after the start
Days in the bed to the first harvest (card)	36
First harvest, if planted in this window	13 July – 7 October
Days left for picking	128
Daylight	15:26 on 17 May, 16:09 on 7 June
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 11 rainy days

The same dates in Luxembourg hold for Cucumber, Bell Pepper, Eggplant, Pumpkin and Watermelon.

Zucchini in Luxembourg: care after planting

Planted on 7 June: in the first weeks water every 4 days.

Pests and diseases of zucchini to watch for:

Weather in Luxembourg during the zucchini season

About 424 mm of rain falls in the season; August is the driest month (53 mm) and October the wettest (85 mm).

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
June	22.9	12.9	69	12	16:17
July	24	13.9	65	10	15:54
August	24.2	14.2	53	11	14:29
September	20.4	10.9	74	11	12:40
October	15.2	7.6	85	13	10:51
November	8.9	3.1	78	13	9:07

ERA5 2016–2025, Open-Meteo

Zucchini in nearby cities

Around Luxembourg, Saarbrücken is 4 days earlier and Esch-sur-Alzette 8 days later.

City	Distance	Date	Difference
Esch-sur-Alzette	16 km	15 June – 1 September	8 days later
Ettelbruck	27 km	6 June – 29 August	1 day earlier
Metz	55 km	4 June – 31 August	3 days earlier
Saarbrücken	75 km	3 June – 1 September	4 days earlier
Nancy	103 km	3 June – 31 August	4 days earlier
Liège	120 km	4 June – 2 September	3 days earlier

Where to buy zucchini plants and seeds near Luxembourg

Buy plants ready to set out from 7 June to 1 September (from 17 May to 1 September for an unheated greenhouse); seed for raising your own is sown from 26 April to 11 August. Within 15 km of Luxembourg OpenStreetMap lists 9 garden centres, 3 plant nurseries, 7 markets and 13 farm shops (collected 20 October 2026).

Pretemer Haff — farm shop
Rue Centrale 51, 4499 Limpach · 13 km · pretemerhaff.lu
Bio-Haff an Dudel — farm shop
Rue de la Croix, 4998 Sprinkange · 13 km · dudelmagie.lu
Les paniers de Sandrine — farm shop
Wed–Fri 15:00–19:00 · 10 km · lespaniersdesandrine.lu
Biohaff Clees — farm shop
Tue, Fri 16:00–19:00 · 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