Let It Snow
A good landscape professional will help choose plants that will provide an attractive roofscape for your region in all seasons. "Some sedums are deciduous and lose their leaves in winter, while others just turn a different shade, such as deep russet or bright red," says Ed Snodgrass, an expert in green-roof plants and owner of Maryland's Emory Knoll Farms. Many roofs mix both types of sedums with other perennials for variety. As for snow, most sedums are happy to hunker down under a cozy blanket of the white stuff.