Ornamental grasses start to grow as the weather warms. 

You have enjoyed the movement of the dormant tan and brown leaves all winter long, but now it is time to get rid of last year’s leaves as the new growth begins at the roots. You can tie the old leaves together and then take your shears and trim off the stems down to about six inches or so 

Warm season grasses take much longer before you will see new growth, and cool season grasses will start showing signs of new blades of grass emerging as soon as the weather warms.

Just like your lawn, early spring is a great time to cut off the old dry brown blades of grass to make room for all new green growth from the roots.