I rather love the bog myrtles, rose bushes and junipers. Might it be an idea to use wild plant life to influence desirability?
From a game balance point of view, it could be a matter of simply not assigning the desirability bonus until the wild bush in question has been moved – that way, we’d gain the ability to move them into town as decorations and create little ‘parks’ out of spare areas of empty space.
I know that regular park decorations exist – I just love the look of those wild bushes.