I like the look of the bird of paradise and king palms, in Southern California they are use a lot at hotels and many nicely landscaped front yards have these growing. There are a few, however, that I have seen grow way to tall for the homes that they are at. To a point these plants get too tall and to me look ugly and I want to know if they can be topped in some way to keep them in check at whatever height one might like to keep them at. Any pointers to keep these plants at a "reasonable" height???