Here they grow medium-slow. Perhaps because of lack of humidity??? But I suspect I will have to replace them in two years tops. I really wanted more of a succulent type plant for the main tree in the bonsai. Perhaps a jade or something like that, but could not find a nice single trunk specimen, that I could prune up into a nice tree. All of them were several plants in one pot. So, I can keep a watch out for that plant to replace the Dracaena , and put the Dracaena in a different pot when the time comes. I'll also put something hanging over the edge, as Hetty suggested, at that time. I brought it in tonight...we are suppose to get very close to freezing tonight