See: http://www.nmpromagazine.com/nmpro-0510-miniature-landscape-roses.aspx Here is a link that might be useful: link for above

The original poster is in NW Mississippi and a great rose resource is just up the road, north of Memphis in Brighton TN. Whit Wells lives there. He hybridizes really wonderful roses with bloom sizes from mini, through miniflora up to Hybrid Teas. When we visited him, I was really impressed with his huge greenhouse as well as the roses growing outdoors- just to see the sizes. He does sell plants and you would so love to walk through his greenhouse with him and just listen to him and to appreciate the plants he makes. His email is (last year) Wellswhit@bellsouth.net and he is listed in the phone book.

Yes, I'd say it needs a bigger pot with better drainage. If that ceramic pot doesn't have holes for drainage then the rose is sitting in water. Roses hate to have soggy wet feet. Get it into a big pot with lots of drainage holes and good potting soil and it will do much better. Oh, and full sun is exactly the right place. Roses love sun!

At the moment I don't have either but I hope someone has emailed you.