Lamb's ear (Stachys byzantina) is a dense ground cover with gray-green leaves that prevents weeds and blooms lavender flowers in spring
Creeping mazus (Mazus reptans) forms a dense, weed-suppressing mat with green leaves and tubular flowers in mid-spring
Creeping phlox (Phlox stolonifera) creates a green carpet with pink, purple, and white flowers from late winter to early spring
Crimson clover (Trifolium incarnatum) fills bare patches, blooms in mid-spring, and improves soil quality
Bugleweed (Ajuga) forms a dense mat with dark foliage and lavender flowers that attract pollinators; grows in Zones 4-11, 11 inches tall, 15 inches wide
Yarrow (Achillea millefolium) grows in clusters to suppress weeds, with blooms in various colors like orange, yellow, and red
Sweet woodruff (Galium odoratum) spreads by its roots, forming a dense mat with white flowers in spring
Sapphire indigo clematis (non-climbing variety) suppresses weeds while providing stunning summer flowers
Carex or sedge is a large genus of weed-suppressing plants, including 'Evercolor Everglow', which adds drama to gardens