Different grasses have different needs. Some should be pruned, others need to be left alone, and then there’s a third type of perennial grass that falls in between. The first thing to do is to identify your particular grass’s needs and then just go ahead! To brush, simply take hold of a bunch of grass as you would long hair. Bundle in a section and brush toward the top. Use any old type of brush, even your worn-out hair brushes. There may be dead blades of grass clustered on the outer edge of the plant, simply pull those out by hand. Dead grass blades should come out easily and in complete sections if it is full dead. It shouldn’t take more then a gentle tug. Finger through to clean all the loose blades. Read about different grass types and how to care for them here.