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Last and first frost dates in Nantes

France

In Nantes the last spring frost usually comes around 7 March and the first autumn frost around 29 November, which leaves about 267 frost-free days (median of 2016–2025). Tomato seedlings can go into open ground from 1 May to 9 August.

Last spring frostaround 7 March
First autumn frostaround 29 November
Frost-free days267 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 Nantes?

The last frost in Nantes usually comes around 7 March: 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 14 February, while corn waits until 7 April. The first autumn frost follows around 29 November, about 267 days later: harvest or cover frost-tender crops before then.

When to sow and plant

CropSow for seedlingsPlant out in a greenhouseOpen ground
Achocha12 January – 21 August21 February – 30 September14 March – 30 September
Ageratumfrom 13 February—from 1 May
Arugula——sow 14 February – 25 October
Basil30 March – 27 September7 May – 4 November28 May – 4 November
Beet——sow 14 February – 30 September
Bell Pepper8 March – 10 June7 May – 9 August28 May – 9 August
Black-eyed Susanfrom 21 December—from 14 March
Bok Choy17 January – 8 October21 February – 12 November14 March – 12 November
Borage——sow 14 March – 5 October
Broad bean——sow 14 February – 21 August
Broccoli——sow 14 February – 14 August
Brussels Sprouts10 December – 12 July24 January – 26 August14 February – 26 August
Busy Lizziefrom 20 December—from 14 March
Cabbage——sow 14 February – 22 July
Calendula——sow from 14 February
Carrot——sow 14 February – 6 September
Cauliflower13 December – 14 August24 January – 25 September14 February – 25 September
Celeriac6 December – 11 June21 February – 27 August14 March – 27 August
Celery6 December – 21 June21 February – 6 September14 March – 6 September
Celosiafrom 14 Marchfrom 28 Aprilfrom 19 May
Chamomile——sow 14 February – 25 September
Chayote19 December – 4 June17 March – 31 August7 April – 31 August
Chickpea——sow 14 February – 11 August
Chicory30 December – 5 September—14 February – 30 September
Chili Pepper8 March – 17 July7 May – 15 September28 May – 15 September
China asterfrom 16 Marchfrom 7 Mayfrom 28 May
Chives——sow 14 February – 16 September
Cilantro——sow 14 February – 26 September
Corn——sow 7 April – 11 August
Corn poppy——sow from 14 February
Cosmosfrom 14 Marchfrom 28 Aprilfrom 19 May
Cucumber9 April – 17 August7 May – 14 September28 May – 14 September
Daikon——sow 14 February – 23 September
Delphiniumfrom 26 November—from 14 February
Dill——sow 14 February – 6 October
Edging lobeliafrom 20 December—from 14 March
Eggplant8 March – 10 June7 May – 9 August28 May – 9 August
Florence fennel7 January – 21 August21 February – 5 October14 March – 5 October
Foxglovefrom 8 November—from 14 February
Garden sorrel——sow 14 February – 24 September
Green Beans——sow 19 May – 19 August
Hollyhock——sow from 14 February
Hyssop——sow 14 February – 17 August
Kale——sow 14 February – 18 September
Kiwano9 March – 24 August10 April – 25 September1 May – 25 September
Kohlrabi——sow 14 February – 28 September
Leek15 November – 2 June24 January – 11 August14 February – 11 August
Lemon balm——sow 14 February – 20 September
Lettuce——sow 14 February – 3 October
Lisianthusfrom 29 Octoberfrom 24 Januaryfrom 14 February
Lovage——sow from 14 February
Luffa26 March – 18 June7 May – 30 July28 May – 30 July
Marigoldfrom 10 Januaryfrom 21 Februaryfrom 14 March
Marjoram8 March – 5 September—28 May – 4 November
Melon9 April – 4 August7 May – 1 September28 May – 1 September
Microgreens——sow 19 May – 15 November
Moringa22 March – 10 September16 May – 4 November6 June – 4 November
Moss rosefrom 27 December—from 14 March
Mustard greens——sow 14 February – 15 October
Napa cabbage19 January – 15 September21 February – 18 October14 March – 18 October
Nasturtiumfrom 14 Januaryfrom 21 Februaryfrom 14 March
Okra26 March – 29 August7 May – 10 October28 May – 10 October
Oregano25 November – 26 August24 January – 25 October14 February – 25 October
Pansyfrom 29 Novemberfrom 24 Januaryfrom 14 February
Parsley——sow 14 February – 14 September
Parsnip——sow 14 February – 3 August
Peanut31 March – 25 July7 May – 31 August28 May – 31 August
Peas——sow 14 February – 16 September
Petuniafrom 5 Marchfrom 7 Mayfrom 28 May
Physalis24 February – 22 July10 April – 5 September1 May – 5 September
Pumpkin26 March – 23 June7 May – 4 August28 May – 4 August
Purple coneflowerfrom 23 November—from 14 February
Radish——sow 14 February – 30 October
Sage6 December – 22 August24 January – 10 October14 February – 10 October
Scarlet sagefrom 17 February—from 1 May
Snapdragonfrom 20 Novemberfrom 24 Januaryfrom 14 February
Soybean——sow 28 May – 10 September
Spinach——sow 14 February – 5 October
Stevia20 February – 13 July10 April – 31 August1 May – 31 August
Stock——sow from 14 February
Sunflower——sow from 19 May
Sweet alyssum——sow from 14 February
Sweet Corn4 March – 5 September26 March – 27 September16 April – 27 September
Sweet peafrom 13 Decemberfrom 24 Januaryfrom 14 February
Sweet William——sow from 14 February
Swiss Chard——sow 14 February – 30 September
Thyme——sow 14 February – 11 August
Tomato17 February – 18 June10 April – 9 August1 May – 9 August
Turnip——sow 14 February – 2 October
Watercress——sow 14 February – 13 October
Watermelon9 April – 23 July7 May – 20 August28 May – 20 August
Zinniafrom 11 Aprilfrom 16 Mayfrom 6 June
Zucchini16 April – 22 August7 May – 12 September28 May – 12 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 Nantes

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 7 days before the last spring frost and 15 °C 55 days after it.

SoilDateAgainst the last spring frost
5 °Calready in the first week of January—
10 °C28 February7 days earlier
15 °C1 May55 days later
18 °C28 May82 days later

Frost dates near Nantes

Of the nearest cities on our list, the last spring frost ends earliest in La Rochelle (14 February) and latest in Le Mans (2 April).

CityDistanceLast spring frostFirst autumn frost
Angers80 km12 March27 November
Rennes99 km12 March28 November
La Rochelle122 km14 February12 December
Le Mans157 km2 April24 November
Poitiers160 km19 March19 November

Seeds, seedlings and markets in Nantes

Within 15 km of Nantes OpenStreetMap lists 18 garden centres, 1 plant nursery, 51 markets and 22 farm shops (collected 20 October 2026). The nearest garden centre to the city centre is La Brocante Verte, 2 km away.

Places: © OpenStreetMap contributors, ODbL.

What to grow at home in winter in Nantes

Frosts in Nantes usually come from about 29 November to about 7 March. 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 Nantes by month

Average weather in Nantes over 2016–2025: the warmest month is August. Months that average 20 °C or more by day: June–September (22.3–25.5 °C). No month averages below 0 °C at night; the coldest nights, in January, average 3.4 °C. About 834 mm of rain falls in a year, on 132 days; October is the wettest month (102 mm) and July the driest (37 mm).

MonthDay, °CNight, °CRain, mmRainy days
January9.13.49514
February10.94.16511
March135.37412
April16.27569
May19.610.45912
June23.414.16911
July25.215.4378
August25.515.5407
September22.313.15610
October1810.410212
November12.86.49013
December10.24.79113

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 30 October
Crocusby 30 October
Daffodilby 30 October
Garlic30 October – end of December
Grape hyacinthby 30 October
Helleboreby 30 October
Hyacinthby 30 October
Lilyby 30 October
Ornamental onionby 30 October
Peonyby 30 October
Saffronby 30 October
Snowdropby 30 October
Tulipby 30 October
Wild garlicby 30 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).