Sempervivum SuperSemps 'Onyx' is a hen and chicks with extra large, dark mahogany-black rosettes.

Sempervivum SuperSemps 'Ruby' is a hen and chicks with giant, 8 inch wide, dark maroon rosettes.

Senecio candicans 'Angel Wings' is a "wow" plant with large, silver-white, ruffled, velvety leaves with toothed edges.

Senecio mandraliscae is a spreading succulent with long blue gray pencil-like fleshy leaves and small white flowers.

Lush and tropical purple foliage hardy to zone 7!

Sideritis syriaca 'Sarada's Mountain Tea' or ironwort is an evergreen shrub with gray-green fuzzy foliage and yellow flowers.

Sisyrinchium californicum is known as the golden-eyed grass. It has iris-like foliage and cheerful six-tepaled, star-shaped flowers.

Sisyrinchium idahoense, the Idaho blue-eyed grass, has small iris-like foliage and cheerful star-shaped blue flowers.

Sisyrinchium nashii 'Suwannee' is a blue-eyed grass with small iris-like foliage and cheerful starry sky blue flowers.

S. japonica 'Limelight' produces bright green flower buds in the fall that open to fragrant white flowers in mid-spring.

Skimmia japonica 'Magic Marlot' is a slow-growing, dwarf cultivar with blue-green and cream variegated leaves perfect and fragrant, white flowers.

Skimmia japonica 'Rubella' features showy, red floral buds in winter that open to fragrant white panicles in the spring.

Solidago shortii 'Solar Cascade' is a nativar of the endangered Short's goldenrod with cascading branches of long-blooming yellow flowers.