Good question. What I like about it is it will grow trouble free where other things won't as long as it's happy there. I have spring bulbs that I plant in it and it hides them once they have bloomed. So some people like a lot of greenery and others like something more open with mulch surrounding the plants. I just wouldn't let it near your lawn. If you want to go back to two clumps, go for it. The beauty about gardening is you can always change your mind.