Trailing Bellflowers—Attracts Butterflies This drought-resistant ground cover is populated with beautiful lilacblue star-shaped flowers. Let it cascade down walls, hang from a planter or fill your rock garden. It will grow in almost any soil.
20 Colorful Plants for Shade Gardens Amethyst flower (Browallia hybrids): If you love blue flowers, this annual is a must. Amethyst flower has star-shaped blooms of brilliant blue and sky blue, as well as violet and white.