How to get rid of Mondo grass taking over .

Question

Seems to be very difficult to remove with strong root system

Answer 1

You are right that this is a difficult plant to get rid of. Here's a link to an article that will help: https://www.gardeningknowhow.com/ornamental/groundcover/monkey-grass/removing-monkey-grass.htm. If it's out of control, you may want to contact a university extension service in your area for help.