Ornamental grasses Home › Forums › Flower-Garden Questions › Annuals and Perennials › Ornamental grasses This topic contains 0 replies, has 1 voice, and was last updated by Anonymous 8 years, 1 month ago. Viewing 1 post (of 1 total) Author Posts October 16, 2008 at 8:52 pm #28553 Anonymous We did a lot of planting this summer for my son’s wedding in our yard. Now we have to hope it allmakes it thru the winter. When do you cut down grasses like zebra grass? Fall or very early spring? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic.