CITRUS FRUITS, IN POTS OR IN THE GROUND, GROWING TIPS
Citrus fruits can be grown in pots or in the ground, depending on where they are grown. Generally, they can withstand sub-zero temperatures of -3 or -4°C for limes, and -10 or -12°C for some mandarins or kumquats. In "borderline" areas, it's possible to grow orange or grapefruit trees, as they can withstand temperatures down to around -7°C.
The full information is available on Au Jardin
https://www.aujardin.info/fiches/agru...
With Bénédicte BACHES from BACHES Nurseries
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