By Kat Harrold
Photo by ~ Sedumphoto.net
Sedum lydium is an unique globular shaped sedum perfect as a dense ground cover in full sun rock gardens and extensive green roofs spreading to 8-12 inches in diameter and 2-4 inches high. White flowers attracting butterflies and other pollinators emerge in early summer. Hardy in USDA zones 5-8, this sedum also offers seasonal interest during the cooler months, taking on a bronze to ruby glow around the edges.