Many Ornamental Grass varieties feature striking flowers stalks that will go dormant in the winter months. Before the next growing season begins, it's a good idea to clean up the stalks – usually by trimming them to about 4-6" above the soil level, or by teasing out the older dead blades. If the stalks break or are unsightly, they can also be trimmed any time of the year.
The following varieties will benefit from cutting back in late winter to early spring:
The following varieties need the old leaves “teased” out in spring:
You can find more detailed care instructions if you desire on the webpage for each variety.