Last and first frost dates in Luxembourg

When is the last frost in Luxembourg?

The last frost in Luxembourg usually comes around 15 April: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 25 March, while corn waits until 3 May. The first autumn frost follows around 18 November, about 217 days later: harvest or cover frost-tender crops before then.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. 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.

When the soil warms up in Luxembourg

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 1 day after the last spring frost and 15 °C 31 days after it.

Frost dates near Luxembourg

Of the nearest cities on our list, the last spring frost ends earliest in Saarbrücken (14 April) and latest in Ettelbruck (27 April).

Seeds, seedlings and markets in Luxembourg

Within 15 km of Luxembourg OpenStreetMap lists 9 garden centres, 3 plant nurseries, 7 markets and 13 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Fleurs Klopp, 1 km away.

• 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
• Stater Maart — market
  Wed 07:30–14:00; Sat 07:30–14:00 · 0 km
• Biohaff Clees — farm shop
  Tue, Fri 16:00–19:00 · 6 km
• Albus Fleurs — garden centre
  Rue Léopold Sédar Senghor 5, 2567 Luxembourg · 2 km · albusfleurs.lu
• Marché hebdomadaire — market
  Thu 07:30–14:00 · 1 km
• Heederhaff — farm shop
  Sat 09:00–12:00 · 7 km · heederhaff.lu

• Where to buy seeds and seedlings in Luxembourg

Places: © OpenStreetMap contributors, ODbL.

Weather in Luxembourg by month

Average weather in Luxembourg over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June–September (20.4–24.2 °C). Nights average below 0 °C in January (-0.2 °C). About 862 mm of rain falls in a year, on 144 days; January is the wettest month (92 mm) and April the driest (53 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).