I am in Virginia 7a. I have a two year old Rio Red which is currently in a 5 gallon bucket. I got two fruit that stayed on last year about size of baseballs but never ripened. Currently in my greenhouse and still on. I am about to give up on them and remove them but still hopeful. Unlikely, I know. Figure it will bloom as soon as I remove the fruit. So far, then, I am a no. I have successfully grown Meyer Lemon, Persian Lime, and Navel Orange here so still hopeful.