Greenly Garden

Last and first frost dates in Strasbourg

France

In Strasbourg the last spring frost usually comes around 6 April and the first autumn frost around 20 November, which leaves about 228 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 12 May to 31 July.

Last spring frostaround 6 April
First autumn frostaround 20 November
Frost-free days228 days

Median of 2016–2025 for the 25 km grid cell of the city: the last day at or below 0 °C in spring and the first in autumn (ERA5 reanalysis via Open-Meteo). In a cold year a frost can come a week or two later — Greenly warns 48 hours ahead.

When is the last frost in Strasbourg?

The last frost in Strasbourg usually comes around 6 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 16 March, while corn waits until 16 April. The first autumn frost follows around 20 November, about 228 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha11 February – 12 August23 March – 21 September13 April – 21 September
Ageratumfrom 24 February—from 12 May
Arugula——sow 16 March – 16 October
Basil3 April – 18 September11 May – 26 October1 June – 26 October
Beet——sow 16 March – 21 September
Bell Pepper12 March – 1 June11 May – 31 July1 June – 31 July
Black-eyed Susanfrom 20 January—from 13 April
Bok Choy16 February – 29 September23 March – 3 November13 April – 3 November
Borage——sow 13 April – 26 September
Broad bean——sow 16 March – 12 August
Broccoli——sow 16 March – 5 August
Brussels Sprouts9 January – 3 July23 February – 17 August16 March – 17 August
Busy Lizziefrom 19 January—from 13 April
Cabbage——sow 16 March – 13 July
Calendula——sow from 16 March
Carrot——sow 16 March – 28 August
Cauliflower12 January – 5 August23 February – 16 September16 March – 16 September
Celeriac5 January – 2 June23 March – 18 August13 April – 18 August
Celery5 January – 12 June23 March – 28 August13 April – 28 August
Celosiafrom 11 Marchfrom 25 Aprilfrom 16 May
Chamomile——sow 16 March – 16 September
Chayote28 December – 26 May26 March – 22 August16 April – 22 August
Chickpea——sow 16 March – 2 August
Chicory29 January – 27 August—16 March – 21 September
Chili Pepper12 March – 8 July11 May – 6 September1 June – 6 September
China asterfrom 20 Marchfrom 11 Mayfrom 1 June
Chives——sow 16 March – 7 September
Cilantro——sow 16 March – 17 September
Corn——sow 16 April – 2 August
Corn poppy——sow from 16 March
Cosmosfrom 11 Marchfrom 25 Aprilfrom 16 May
Cucumber13 April – 8 August11 May – 5 September1 June – 5 September
Daikon——sow 16 March – 14 September
Delphiniumfrom 26 December—from 16 March
Dill——sow 16 March – 27 September
Edging lobeliafrom 19 January—from 13 April
Eggplant12 March – 1 June11 May – 31 July1 June – 31 July
Florence fennel6 February – 12 August23 March – 26 September13 April – 26 September
Foxglovefrom 8 December—from 16 March
Garden sorrel——sow 16 March – 15 September
Green Beans——sow 16 May – 10 August
Hollyhock——sow from 16 March
Hyssop——sow 16 March – 8 August
Kale——sow 16 March – 9 September
Kiwano20 March – 15 August21 April – 16 September12 May – 16 September
Kohlrabi——sow 16 March – 19 September
Leek15 December – 24 May23 February – 2 August16 March – 2 August
Lemon balm——sow 16 March – 11 September
Lettuce——sow 16 March – 24 September
Lisianthusfrom 28 Novemberfrom 23 Februaryfrom 16 March
Lovage——sow from 16 March
Luffa30 March – 9 June11 May – 21 July1 June – 21 July
Marigoldfrom 9 Februaryfrom 23 Marchfrom 13 April
Marjoram12 March – 27 August—1 June – 26 October
Melon13 April – 26 July11 May – 23 August1 June – 23 August
Microgreens——sow 16 May – 6 November
Moringa26 March – 1 September20 May – 26 October10 June – 26 October
Moss rosefrom 26 January—from 13 April
Mustard greens——sow 16 March – 6 October
Napa cabbage18 February – 6 September23 March – 9 October13 April – 9 October
Nasturtiumfrom 13 Februaryfrom 23 Marchfrom 13 April
Okra30 March – 20 August11 May – 1 October1 June – 1 October
Oregano25 December – 17 August23 February – 16 October16 March – 16 October
Pansyfrom 29 Decemberfrom 23 Februaryfrom 16 March
Parsley——sow 16 March – 5 September
Parsnip——sow 16 March – 25 July
Peanut4 April – 16 July11 May – 22 August1 June – 22 August
Peas——sow 16 March – 7 September
Petuniafrom 9 Marchfrom 11 Mayfrom 1 June
Physalis7 March – 13 July21 April – 27 August12 May – 27 August
Pumpkin30 March – 14 June11 May – 26 July1 June – 26 July
Purple coneflowerfrom 23 December—from 16 March
Radish——sow 16 March – 21 October
Sage5 January – 13 August23 February – 1 October16 March – 1 October
Scarlet sagefrom 28 February—from 12 May
Snapdragonfrom 20 Decemberfrom 23 Februaryfrom 16 March
Soybean——sow 1 June – 1 September
Spinach——sow 16 March – 26 September
Stevia3 March – 4 July21 April – 22 August12 May – 22 August
Stock——sow from 16 March
Sunflower——sow from 16 May
Sweet alyssum——sow from 16 March
Sweet Corn18 March – 27 August9 April – 18 September30 April – 18 September
Sweet peafrom 12 Januaryfrom 23 Februaryfrom 16 March
Sweet William——sow from 16 March
Swiss Chard——sow 16 March – 21 September
Thyme——sow 16 March – 2 August
Tomato28 February – 9 June21 April – 31 July12 May – 31 July
Turnip——sow 16 March – 23 September
Watercress——sow 16 March – 4 October
Watermelon13 April – 14 July11 May – 11 August1 June – 11 August
Zinniafrom 15 Aprilfrom 20 Mayfrom 10 June
Zucchini20 April – 13 August11 May – 3 September1 June – 3 September

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 Strasbourg

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 6 days before the last spring frost and 15 °C 36 days after it.

SoilDateAgainst the last spring frost
5 °C21 January75 days earlier
10 °C31 March6 days earlier
15 °C12 May36 days later
18 °C1 June56 days later

Frost dates near Strasbourg

Of the nearest cities on our list, the last spring frost ends earliest in Karlsruhe (5 April) and latest in Colmar (20 April).

CityDistanceLast spring frostFirst autumn frost
Colmar62 km20 April17 November
Freiburg im Breisgau65 km12 April16 November
Karlsruhe68 km5 April19 November
Saarbrücken93 km14 April18 November
Mulhouse96 km6 April17 November

Seeds, seedlings and markets in Strasbourg

Within 15 km of Strasbourg OpenStreetMap lists 15 garden centres, 13 markets and 31 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is Tchungle, 1 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Strasbourg

Frosts in Strasbourg usually come from about 20 November to about 6 April. These plants have indoor care in their Greenly cards and are harvested quickly, so they can be sown on a windowsill in winter.

Weather in Strasbourg by month

Average weather in Strasbourg over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: May–September (20–26.2 °C). No month averages below 0 °C at night; the coldest nights, in January, average 0.1 °C. About 876 mm of rain falls in a year, on 145 days; January is the wettest month (84 mm) and March the driest (59 mm).

MonthDay, °CNight, °CRain, mmRainy days
January5.90.18414
February91.36812
March12.32.65912
April16.35.56310
May209.98113
June25.214.98113
July26.2167811
August26.2166611
September22.112.56510
October16.78.67713
November9.73.77513
December6.81.37913

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

CropWhen to plant
Bearded Irisby 21 October
Crocus21 October – end of December
Daffodil21 October – end of December
Garlic21 October – end of December
Grape hyacinthby 21 October
Helleboreby 21 October
Hyacinth21 October – end of December
Lilyby 21 October
Ornamental onionby 21 October
Peonyby 21 October
Saffronby 21 October
Snowdropby 21 October
Tulip21 October – end of December
Wild garlicby 21 October

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).