I have Dracaena 'Warneckii', the same one Julie has, and its coming up to around 4 feet tall....and I've had it for maybe 10 years(?). Doesn't require much, it used to live in a north window and now it lives off to the side of a south window. You just have to water more in the brighter light or the leaves get burn marks on them. Other then that there is no problems and it stays inside year round.
