Basically, all lantana will freeze to the ground in Texas each year, as we seldom go through a winter without any freezing temperatures. Not all lantana are root-hardy; the most common (New Gold and Purple Trailing) will come back from their roots, especially if you have protected them with a good layer of mulch. Many of the multicolored ones must be treated as annuals, as they freeze and die each year. All lantana may be cut back to the ground as soon as the leaves freeze and turn black. In fact, they should be cut back even if they don't freeze. This is usually done in mid-February. Otherwise, they will become woody and sparse, and rather unattractive.
