Wow, that's quite something! My site is full of these bushes and I often have to get rid of them as they are in my way, but I was always keen on keeping as much, because the flowers makes one of the best teas in the world and it's one of the most treasured bushes of the ancients, they called it magic tree or bubble tree and had a special brewers God living in a tree, because it has properties to protect and ferment things in a very special way. Never cured to my mind to plant them in numbers, but hey maybe that's something I should do, especially because these are gaining popularity in broad audience these days too.....