oleander problems

I have an Oleander growing out in my front garden, it's in thin poor soil there and flourishes.

It sounds like it could be a watering problem (too much or too little) aswell as a humidity problem, bringing it in the house wouldn't be too good for it, in my opinion - the wildy differing temps can't do it much good.

I can definately vouch for its hardiness, regarding cutting it hard back, because i do this to mine every so often and it's fine with it, makes new growth beautifully.