When to plant tomatoes in Luxembourg: 16 May – 29 July

In Luxembourg, tomato: sow for seedlings from 4 March to 7 June; plant into a greenhouse from 25 April to 29 July; plant out into open ground from 16 May to 29 July. For plants and seeds, the places nearby include Fleurs Klopp (garden centre, 1 km) and Albus Fleurs (garden centre, 2 km); addresses and opening hours are below.

Tomato 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 15 °C — the minimum on the tomato card — only around 16 May, 31 days later.

Last spring frost	15 April
Top 7 cm of soil at 15 °C	16 May, 31 days after the last frost
Into an unheated greenhouse	25 April – 29 July; April outside: 4.1 °C at night, 14.1 °C by day; card 16–27 °C
First autumn frost	18 November, 186 days after the start
Days in the bed to the first harvest (card)	70
First harvest, if planted in this window	25 July – 7 October
Days left for picking	116
Daylight	12:26 on 25 March, 15:23 on 16 May
Watering outdoors when fruiting (card)	every 3 days; the driest month, August, has 11 rainy days

Tomato in Luxembourg: care after planting

Planted on 16 May: in the first weeks water every 4 days.

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

16 May — feed: balanced (NPK)
13 June — feed: nitrogen

Pests and diseases of tomato 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 Luxembourg during the tomato season

No month of the season averages above the tomato card's 16–27 °C by day; the warmest, August, averages 24.2 °C. Months that stay below 16 °C even by day on average: October (15.2 °C) and November (8.9 °C). Nights average below 16 °C in every month of the season, from 3.1 °C to 14.2 °C.

Month	Day, °C	Night, °C	Rain, mm	Rainy days	Daylight on the 15th
May	18.1	8.4	74	11	15:21
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

Tomato in nearby cities

Around Luxembourg, Saarbrücken is 2 days earlier and Esch-sur-Alzette 5 days later.

City	Distance	Date	Difference
Esch-sur-Alzette	16 km	21 May – 29 July	5 days later
Ettelbruck	27 km	15 May – 26 July	1 day earlier
Metz	55 km	16 May – 28 July	same day
Saarbrücken	75 km	14 May – 29 July	2 days earlier
Nancy	103 km	16 May – 28 July	same day
Liège	120 km	16 May – 30 July	same day

Where to buy tomato plants and seeds near Luxembourg

Buy plants ready to set out from 16 May to 29 July (from 25 April to 29 July for an unheated greenhouse); seed for raising your own is sown from 4 March to 7 June. Within 15 km of Luxembourg OpenStreetMap lists 9 garden centres, 3 plant nurseries, 7 markets and 13 farm shops (collected 20 October 2026).

Fleurs Klopp — garden centre
Avenue de la Faïencerie 5, 1510 Luxembourg · Mon 14:00–18:30; Tue–Sat 08:00–12:30, 14:00–18:30; Sun 10:00–12:00 · 1 km · fleurs-klopp.lu
Fleurs Wüst — garden centre
Rue de Mullendorf 11, 7329 Heisdorf · Mon–Fri 08:00–12:00, 13:30–18:30; Sat 08:00–18:00 · 8 km · fleurswust.lu
Albus Fleurs — garden centre
Rue Léopold Sédar Senghor 5, 2567 Luxembourg · 2 km · albusfleurs.lu
Gardencenter+ — garden centre
Rue de la Gare 62, 6117 Junglinster · Mon–Fri 08:00–12:00, 13:00–18:00; Sat 08:00–17:00 · 14 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