Landscape designer Stephen Suzman likes the groundcover species Senecio mandraliscae for its fast growth and distinctive chalky-blue fleshy foliage. A native of South Africa, it grows 12 to 18 inches tall with masses of 3- to 4-inch pencillike leaves. greatgardenplants.com
Often called pork and beans or jellybean plant, Sedum x rubrotinctum is a 6- to 8-inch low-mounding groundcover with fat little leaves that go from bright green to red. Suzman calls it “very easy and reliable.” The glowing hues of Sedum rupestre ‘Angelina’ have made it a must-have for containers and perennial borders, with needlelike chartreuse to bright-gold leaves usually tipped with orange. greatgardenplants.com
For unusual muted shades, landscape designer Stephen Suzman likes to use Echeveria ‘Afterglow’ (powdery pinkish lavender) and E. ‘Perle von Nürnberg’, pictured (grayish brown with a pinkish mauve tinge). Both form rosettes of overlapping leaves, 1 foot across for ‘Afterglow’, 5 to 6 inches for ‘Perle von Nürnberg’. provenwinners.com