When used as a perennial in hardiness zones 9 through 11, you will not have to worry about winterizing your plants. If your temperatures seem to drop cooler than normal, add a bed of mulch around the base to hold in heat and moisture. However, if you live in cooler climates, you must prepare your plants for the winter. You should move your lantana inside before the first frost of the season. These annuals typically go dormant from autumn to early spring. Next, cut back on your watering schedule, only water 1/2 inch each week. Also, it is important to stop fertilizing in the late summer so you do not affect their dormancy period. The best place for your plant to live indoors is near a window that receives diffused light. Always remember to turn your plant every so often to make sure it does not burn. As soon as temperatures outside are consistently 55 degrees or higher, you can begin to move your plant back outside.