Think of your Ornamental Grass plants to be like your lawn…so in the spring it is best to remove the old, dry tops from the grass plants to allow the new grass plants to begin to grow.  The foliage from last year does not turn green, but it needs to be removed at this time of the year before they start to grow. 

A simple way to clean them up is to tie up the clump with some string or twine, trim off the stems close to the ground, and use the dried tops as mulch in your vegetable garden or cut up and add to the compost pile.

If the clumps have gotten large, you can also divide the clumps into smaller pieces to be used in your yard or to share with your neighbors now too.