I have had both pompas grass and bamboo. Now, it might have been the type of bamboo I had, but I found it MUCH more invasive than the pompas. The pompas made one LARGE, thick clump over about 40 years. I cut it down several times, but it always came back. I even burned it, but it came back. Finally, it got too big for us to see to get out of the driveway, so I had to dig it. That was not an easy chore. On the other hand, my dad planted bamboo on our property about 25 years ago. I am still fighting it. Digging, pulling, spraying it with Round Up, whatever I can do to get rid of it. It has put up shoots a good 100 feet away from his original clump. It is beautiful in other places, and I think we should cultivate it for paper and building materials, but I don't want it in my yard!!! lol