Booner21, Daylilies are similar in growth patterns and we divide them often. It is not easy. We use two large, long and strong screwdrivers. Stick them into the matt of roots on an angle forming am X with the two screwdrivers. Then just pull the screw drivers together and push them apart. First cuts are harder, then as the pieces become smaller they are easier to work. It helps to wet the clump and spray at it with a high pressure hose some also before inserting screwdrivers. When I get the clumps small enough to pick up they are placed in water in a kidde swimming pool to help them get wet throughout. I have not done this with MG but this would be the first thing I would try. Good luck, am looking forward to hearing what you find to work.