Question: why did my jasmine suffer from the cold?

Good morning!
Last year I planted several jasmines in my garden near the fence! beautiful blooms but then that frightening cold arrived, the leaves turned brown. The branches are not dry and not even the leaves and I do not understand whether breasts live or not. what should i do to understand this? and then I should prune them even though they are still small? alternatively you would recommend the false jasmine as being better resistant to cold temperatures. I live in Milan and I can't plant anything that needs a lot of land because I have a garage at the bottom level. I will have only 30/40 cm of land available.
Thanks so much,

Jasmine: Answer: jasmine in the garden

Dear Lucia,
winter 2011-2012 was hopefully an isolated and particular event, with very cold temperatures and intense and prolonged frosts, with repeated snowfalls, all already in the months of January and February, when we had already expected a little spring. For this reason even plants resistant to cold have been ruined, even irreparably.
In your case, you have planted a jasmine, a plant typical of Mediterranean gardens, which bears sporadic frosts, but does not tolerate intense cold, especially if for prolonged periods; in addition to this, the little land available, in case of cold, tends to freeze even in depth, causing damage to the root system.
But before deciding to change plants, I advise you to see if the jasmines recover, also because it is hoped that the winters of the next few years will not be so cold (we hope).
Especially because, if you say that your jasmines are not dead yet, it seems that they are quite resistant, and have adapted to the Milanese climate.
So first of all prune your plants, until you get to the healthy, clear wood, removing all the dried and ruined leaves, hoping to stimulate the plants to produce new healthy and vigorous leaves; if then in the coming months your jasmines show that they are now irreparably damaged, surely the choice to replace them with the false jasmine (trachelospermum jasminoides), which is certainly more resistant, both in the cold and in the summer heat.
In fact in the north of Italy the false jasmine is used almost exclusively, because it is very resistant to cold, and even to frost; the real jasmine instead, often during the cold winters tends to lose most of the aerial part, recovering then in spring.
The false jasmine has a slightly denser and more compact habit than Jasminum, but the flowers are very similar, and also their heady scent; the foliage is oval, coriaceous, dark green; it has the same needs as jasmine, even if it proves to be much more rustic and resistant