In Loire-Atlantique, the cold increases the further you go from the ocean. One winter in ten, it falls to about −7 °C on the Guérande peninsula, −9 °C in Nantes and Saint-Nazaire, −10 °C in the Nantes vineyards and −11 °C in the Châteaubriant area.

We went through thirty winters of Météo-France records, from 1996 to 2026, and compared them with the hardiness of each of our plants. Choose your area below. You will find:

  • the citrus trees that spend the winter outdoors without protection;
  • those that need a fleece on frosty nights;
  • those that stay in a pot.

The lists are kept up to date: only the plants available today are shown with a photo.

Choose your area:

−7 °Cone winter in ten

Guérande peninsula

La Baule-Escoublac, Guérande, Le Croisic, Le Pouliguen, Pornichet, Batz-sur-Mer See the citrus trees for this area

Between the ocean and the salt marshes, the peninsula is the mildest part of the département: −7 °C one winter in ten, −4 °C in an ordinary winter at Guérande. Orange trees, clementines, satsumas, yuzus, kumquats and citranges spend the winter outdoors here; so do lemon trees, with a fleece at each frost, against a south-facing wall. Shelter them from the wind and the salt spray behind a hedge or a wall.

−7 °Cone winter in ten
−4 °Can ordinary winter
−10.3 °Crecord, 2 January 1997
Guérande

The soil of the area and the rootstock

According to the soil map, this area mostly has sodisalisol and ordinary brown soils. In practice, the soil is often chalky, clayey, salty (sea spray, marshes), winter-wet and silty.

Rootstock to favour: FA5.

Your plot may be different. Look at the Géoportail soil map (in French) around your home, then refine with our 5-step test.

The others: in a pot, brought in for the winter

Lemons, limes and less hardy citrus (more tender than −4 °C): in a large pot, outdoors from spring to autumn and brought into a bright, frost-free room for the winter. All our citrus trees.

−9 °Cone winter in ten

Nantes, Saint-Nazaire, Brière and the Pays de Retz

Nantes, Saint-Nazaire, Rezé, Saint-Herblain, Montoir-de-Bretagne, Herbignac, Machecoul, Nort-sur-Erdre See the citrus trees for this area

The estuary does little to soften the winters: −9 °C one winter in ten, −6 °C in an ordinary winter, at Nantes-Bouguenais as at Saint-Nazaire-Montoir. Satsumas, yuzus, kumquats, citranges and the hardiest clementines spend the winter outdoors here; orange trees and the other clementines need a fleece at each frost, against a south-facing wall; lemon trees stay in pots. The soils, often clay and rather acid, stay wet in winter: plant on a mound.

−9 °Cone winter in ten
−6 °Can ordinary winter
−11.2 °Crecord, 2 January 1997
Nantes-Bouguenais

The soil of the area and the rootstock

According to the soil map, this area mostly has ordinary brown soils, soils waterlogged part of the year and river alluvium. In practice, the soil is often winter-wet, acid, clayey and silty.

Rootstocks to favour: Poncirus, then FA5.

Your plot may be different. Look at the Géoportail soil map (in French) around your home, then refine with our 5-step test.

The others: in a pot, brought in for the winter

Lemons, limes and less hardy citrus (more tender than −6 °C): in a large pot, outdoors from spring to autumn and brought into a bright, frost-free room for the winter. All our citrus trees.

−10 °Cone winter in ten

Nantes vineyards

Vallet, Clisson, Le Pallet, La Haie-Fouassière, Le Loroux-Bottereau See the citrus trees for this area

The vineyards are colder than Nantes: −10 °C one winter in ten, −7 °C in an ordinary winter. La Haie-Fouassière falls to −10.8 °C one winter in ten and recorded −12.5 °C in January 1997. Satsumas, yuzus, kumquats and citranges spend the winter outdoors here; orange trees and clementines need a fleece at each frost; lemon trees stay in pots. The clay soils stay wet in winter: plant on a mound.

−10 °Cone winter in ten
−7 °Can ordinary winter
−12.5 °Crecord, 2 January 1997
La Haie-Fouassière

The soil of the area and the rootstock

According to the soil map, this area mostly has ordinary brown soils and soils waterlogged part of the year. In practice, the soil is often winter-wet, acid, clayey and silty.

Rootstocks to favour: Poncirus, then FA5.

Your plot may be different. Look at the Géoportail soil map (in French) around your home, then refine with our 5-step test.

The others: in a pot, brought in for the winter

Lemons, limes and less hardy citrus (more tender than −7 °C): in a large pot, outdoors from spring to autumn and brought into a bright, frost-free room for the winter. All our citrus trees.

−11 °Cone winter in ten

Châteaubriant area and the north of the département

Châteaubriant, Derval, Nozay, Soudan, Guémené-Penfao See the citrus trees for this area

Far from the sea, the north of the département is the coldest: −11 °C one winter in ten, −7 °C in an ordinary winter. Soudan falls to −11.5 °C one winter in ten, Derval to −10 °C. Citranges, yuzus and the hardiest satsumas spend the winter outdoors here; the other satsumas, kumquats, orange trees and the hardiest clementines need a fleece, sheltered by a south-facing wall; lemon trees and the other clementines stay in pots. The soils are wet in winter: take care of drainage.

−11 °Cone winter in ten
−7 °Can ordinary winter
−12.1 °Crecord, 2 January 1997
Derval

The soil of the area and the rootstock

According to the soil map, this area mostly has soils waterlogged part of the year, ordinary brown soils and silty soils. In practice, the soil is often winter-wet, clayey and silty.

Rootstocks to favour: Poncirus, then FA5.

Your plot may be different. Look at the Géoportail soil map (in French) around your home, then refine with our 5-step test.

The others: in a pot, brought in for the winter

Lemons, limes and less hardy citrus (more tender than −8 °C): in a large pot, outdoors from spring to autumn and brought into a bright, frost-free room for the winter. All our citrus trees.

Readings from the Météo-France stations (winters 1996-1997 to 2025-2026)
StationAltitudeOrdinary winterOne winter in tenRecordWinters at −9 °C or below
Guérande4 m−3.8 °C−6.5 °C−10.3 °C (2 January 1997)1 out of 23
Herbignac22 m−4.9 °C−8.5 °C−11.1 °C (2 January 1997)2 out of 30
Nort-Sur-Erdre13 m−5.6 °C−8.4 °C−10.8 °C (2 January 1997)2 out of 30
Nantes-Bouguenais26 m−5.8 °C−8.8 °C−11.2 °C (2 January 1997)2 out of 30
Saint-Nazaire-Montoir3 m−5.9 °C−8.9 °C−10.9 °C (2 January 1997)2 out of 30
Saint-Même-le-Tenu4 m−5.9 °C−8.9 °C−10.7 °C (1 March 2005)1 out of 23
Saint-Joachim3 m−6 °C−9.1 °C−10.8 °C (2 January 1997)2 out of 21
Le Pallet35 m−6.2 °C−9.4 °C−11.7 °C (2 January 1997)3 out of 30
Derval43 m−6.9 °C−10 °C−12.1 °C (2 January 1997)2 out of 21
La Haie-Fouassière20 m−7 °C−10.8 °C−12.5 °C (2 January 1997)5 out of 24
Soudan77 m−7 °C−11.5 °C−11.5 °C (2 January 1997)4 out of 24

“Ordinary winter”: half of the winters go colder, the other half less cold. “One winter in ten”: this cold is reached or exceeded in about one winter in ten. Calculations by the Greffeur d'agrumes nursery.

How to read these figures

The hardiness given on our product pages is the cold that an adult, healthy and hardened citrus tree withstands during a short frost. We compare it with the cold that comes back about one winter in ten: a plant listed “without protection” withstands at least that cold. In harsher winters, about three in thirty, keep a winter fleece ready for the coldest nights.

Very harsh winters are still possible. On 2 January 1997, Nantes-Bouguenais fell to −11.2 °C and La Haie-Fouassière to −12.5 °C. Such cold can burn the leaves or a few shoots of a citrus tree that is only just hardy enough. Wait for spring to see what grows back before pruning.

To understand what helps a tree get through frost, read Understanding citrus hardiness.

Our advice for Loire-Atlantique

  • Make the most of the coast. Near the sea, conditions are favourable, but they change quickly: one winter in ten, Guérande falls to −6.5 °C, Saint-Nazaire-Montoir to −8.9 °C. Choose your citrus according to the nearest station.
  • Shelter them from the wind and the salt spray. On the coast, a hedge or a wall protects the leaves from salty gusts of wind.
  • Avoid hollows. Cold air collects at the bottom of valleys and in marshes. Plant halfway up a slope or against a south-facing wall, never at the lowest point of the garden.
  • Take care of drainage. Around Nantes, in the vineyards and in the north of the département, the soils are often clay and stay wet in winter. Plant on a mound. Choose the rootstock for your soil: our 5-step test helps you, Which rootstock should you choose?
  • Plant in spring, once the frosts are over. The tree then has a whole season to take root before its first winter.
  • Protect young plants on nights below −5 °C during the first years. Put the winter fleece on at each frost and take it off as soon as the frost stops.
  • Mulch in summer only, against drought, without the straw touching the trunk. Pull it away from the foot of the tree at the end of autumn: moisture at the collar encourages phytophthora.

Frequently asked questions

Can I plant a lemon tree in the ground in Nantes?

No. Lemon trees withstand about −5 °C, and Nantes falls to −9 °C one winter in ten. Keep them in pots, brought in for the winter. On the Guérande peninsula, where Guérande falls to −6.5 °C one winter in ten, a lemon tree can live in the ground with a fleece at each frost, against a south-facing wall. For a sour fruit in the ground, choose a yuzu or a hardy lemon substitute instead. You will find them in Lemons and lemon substitutes.

Which citrus trees withstand the cold best in Loire-Atlantique?

Citranges, which withstand −15 °C, and yuzus spend the winter without protection throughout the département. So do satsumas and kumquats, except in the Châteaubriant area: only the hardiest satsumas do without protection there; the other satsumas and kumquats need a fleece there. They are brought together in Hardy citrus.

What about orange trees and clementines?

They withstand −7 to −9 °C depending on the variety. On the Guérande peninsula, orange trees and clementines spend the winter without protection. In Nantes and Saint-Nazaire, so do the hardiest clementines; orange trees and the other clementines need a fleece at each frost, sheltered by a south-facing wall. In the vineyards, orange trees and clementines are grown in the ground with a fleece. In the Châteaubriant area, orange trees and the hardiest clementines can try it too, with a fleece; keep the other clementines in pots.

My town is not listed: which area should I choose?

Take the nearest area, then compare with the nearest station in the table of readings. The further you are from the sea, the more it freezes. Take off one or two degrees if you are in a hollow or at the bottom of a valley.

These figures are guidelines. Your garden may be milder or colder than the nearest station. A question about your plot? Write to us.

Sources: Météo-France, daily basic climatological data (data.gouv.fr, Licence Ouverte 2.0); near the eastern border, also the Deutscher Wetterdienst (Datenlizenz Deutschland 2.0); towns, altitudes and boundaries: INSEE, IGN (Admin Express, RGE ALTI) and geo.api.gouv.fr (Licence Ouverte); soils: dominant soil map INRAE / Gis Sol (Licence Ouverte). Topsoil lime: LUCAS, European Commission, JRC (ESDAC, Ballabio et al. 2019).

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