Jasmines are fragrant plants native to the tropics and are members of the Oleaceae family. Jasmines are considered vines; however, they can be grown to resemble shrubs if you prune them frequently in order to get your desired shape. In climates that are too cold for Jasmines to grow all year (usually USDA plant hardiness zone 8 to 9a) they will typically die to the ground and then regrow in the spring. Before and during the winter months in these colder zones, your Jasmines will need just a little bit of special care in order to grow again.
Reduce watering in the fall to prepare the Jasmine for winter. Jasmines need constant moisture during the spring and summer when growth is rapid. In the fall, after the first frost, allow the soil to dry out between waterings (about an inch or 2 deep). Then, in the winter, water it only during long dry spells (longer than two or three weeks). If the ground is frozen, don't water it at all.
Mulch your outdoor Jasmine plant in zones 8 and 9a with about 2 to 4 inches of organic mulch, such as bark, hay or wood chips. Do this before the first frost to help prevent the roots from heaving, which is when the roots repeatedly freeze and thaw during the winter months.
Bring your potted Jasmine indoors before the first frost as an alternative to the previous steps, especially if you live in a climate colder than zone 8 where Jasmines typically do not survive the winter months (even with mulch). Place it in a sunny location, such as near a south facing window and water weekly with about an inch of water.