Carol,

Are you sure you are really still in 6B? Very few places anywhere in Tennessee would currently be considered that cold. Most of us are somewhere in the zone 7 range now days.

Even if you are in 6B, you might still be able to grow a few cultivars, perennially, with the right conditions. Two important factors are very good drainage (wet feet in the winter is a killer) and not pruning them back until new growth begins in spring (yes, that means leaving the ugly mess all winter).

Here are some cultivars that might have a good chance:

'Mary Ann'
'Miss Huff' - possibly sterile, widely considered the most hardy
'Mozelle' - possibly sterile
'Sonset' - possibly sterile

Thanks Brandon. I'm fairly new to gardening terminology. I googled hardiness zones and entered my zip (37066) and it indicated 6B zone. I'm afraid I don't know the type of lantana I have but maybe I can research that. i have a beautiful spray of foliage now but imagine it will look mucky during the winter. Hanks again for the information

Carol

The search you did was giving results from the old USDA map. It was accurate 30 years ago, but not now. The Arborday zone chart is a little closer to correct. It gives zone 7 (7b if you actually look at the map) for your zipcode.

Here is a link that might be useful: More Current Zip Code to Hardiness Zone Application

Darn, I just looked up my hardiness zone on the more current zone map and it shows I am also in zone 7...I had always thought it was zone 6.
thanks brandon for the new info on hardiness zones
Tom