The phrase "ornamental cabbage" refers to a type of plant that is grown for its colorful leaves and used for decoration purposes, rather than being eaten. Full definition
So often I see pictures featuring all mums or ornamental cabbage in fall decor, but if my annuals are still alive and healthy, I don't want to toss them till frost. (poofingthepillows.com)
I had the wooden trough and added ornamental cabbage, hydrangea, seed pods, berries, cockscomb, and a few other fall grasses and plants. (hymnsandverses.com)