Jan 03, 2022 · Liriope ( Liriope spicata) Lithodora ( Lithodora diffusa) Pig Squeak ( Bergenia rdifolia) Spike Speedwell ( Veronica spicata) Sweet Woodruff ( Galium odoratum) Wishbone Flower ( Torenia fournieri) Some ground vers are a few inches tall, and others top out at two feet or more.