Most ornamental grasses will become less attractive over time if they are not given a regular clean-up. They are best cut back in the autumn or winter depending on where you live. In climates where the ground freezes hard, they will naturally die back so cutting them back to the ground in the early spring will almost be a done deal before you grab the shears. In warmer climates like the Southeast or California, winter months are ideal, although timing is not critical.

Evergreen decorative grasses can be cut back in early spring to make way for new, lush growth. Or you can just run your fingers through the clump and pull away any loose or dead leaves and stems. Deciduous grasses should be cut back low to the ground before too much new green growth appears.  This is best done while the plants are dormant.  You don’t have to cut back ornamental grasses in the garden, but they will look much cleaner, neater and move more gracefully in the breeze if you do.

Here’s a little more about cutting back ornamental grasses in the garden:

Also see:

Japanese Blood Grass

A list of ornamental grasses

How to grow beautiful ornamental grasses