Great for you but the ornamental grass in the picture died in the center. You can see parts of the outside clump are alive and survived dormancy, but the center died because that is where there’s the least sunlight.

I understand these plants did fine before man came along but now they are growing in some suburb in Texas and the climate has gone to shit. A simple pruning will greatly help a plant like this out of dormancy. As long as you wait until after the last frost, pruning away dead grass off a clump will only help, never hurt the plant.