You may be able to overwinter some elephant ears. I've seen that done here in Knoxville. The catch is very, very good drainage. Without good drainage, there's no chance. With great drainage (and possibly a little extra mulch), chances are decent.

Rabbiteye type blueberries do best in this part of the country, but there are a few Southern Highbush and even a couple of Northern Highbush cultivars that are also well suited for Tennessee.

Here are the types I grow. I consider them to be the best-of-the-best for Tennessee. As well as doing a lot of research myself, I got the opinion of a few commercial Tennessee blueberry growers before choosing these. Just about any rabbiteye cultivar should be OK, but be careful when choosing other highbush varieties not listed here.

Bluebelle (Rabbiteye)
Bluecrop (Northern Highbush)
Blue Ray (Northern Highbush)
Climax (Rabbiteye)
Delight (Rabbiteye)
Legacy (Southern Highbush)
O'Neal (Southern Highbush)
Ozark Blue (Southern Highbush) - probably the best
Powderblue (Rabbiteye)
Premier (Rabbiteye)
Tifblue (Rabbiteye)

Thanks so much!

u r welcome!

Hi, I live in the Memphis area, and my elephant ears survive if I cover the bulb with cardboard and mulch. I have a tophat blueberry that is outside in this ice and will be fine come spring. :) it did fine in last years ice storm when i lost 75 percent of my plants. I hope that helps.

Many of the cultivars of Colocasia esculenta thrive in Memphis. Seen here, I have grown Colocasia esculenta 'Taro' for over a decade in Memphis. Another one I have had success with is Colocasia esculenta 'Fontanesii'.

http://i1045.photobucket.com/albums/b453/subtropicalmemphis/Bananas%20cannas%20etc/jungleyard2_zps7wq7zm2k.jpg