how big is your biggest bizzie palm and how old? glad your trees of all sorts and from all sources are doing so well. IF you have space and want to grow another eucalyptus I would suggest you take a look at e. robusta/swamp mahogany (a very close relative of grandis) with dark glossy green leaves rather like a ficus and red rather stringy bark---probably just as fast growing but with a potentially denser crown of foliage.