Grasses are a popular addition to mixed perennial borders and prairie style planting.
Depending on the season you may decide to cut your grasses back in late Autumn.
Alternatively if you like the swaying of dried grasses in your garden then begin trimming your decorative grasses in early Spring.
Secateurs may be useful to prune away some of the long top growth.
Once you have carefully pruned your grass a small hand rake will help to remove and debris, slugs and snails that often make grass hummocks home.