Sedum 'Joyce Tulloch Variegated' has pale green and light yellow variegated leaves flushed with pink.

Sedum ‘Rosetta’is a lovely upright stonecrop to 16 inches with blue-green foliage, reddish stems and white flowers in late summer.

Sedum 'Thundercloud' offers great texture and foliage appeal with handsome, gray green, highly serrated leaves on short, compact plants to ten inches tall.

Selenicereus costaricensis is the Costa Rican or red pitaya or dragon fruit with deep pink skin and magenta flesh.

Selenicereus megalanthus is the vining cactus that produces yellow dragon fruit from its night blooming flowers.

Selenicereus undatus is the pitaya blanca or white dragon fruit with pink skin and white flesh from huge night-blooming flowers.

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

Senecio peregrinus or String-of-Dolphins is grown for its foliage that resembles a pod of jumping dolphins. White flowers in spring,

Senecio rowleyanus or string-of-pearls is a trailing succulent with spherical, succulent leaves resembling a pearl necklace.

Senecio rowleyanus 'Variegata' is the variegated string of pearls or "VSOP". It is a very rare variegated form with leaves variably marked with white and ivory.

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

Moon carrot (Seseli gummiferum) has highly dissected, fern-like, powder blue foliage large umbels of white and pink.

Sidalcea campestris, is a Prairie mallow, a hollyhock-like plant with white to pink flowers grown on strong erect stems and a butteryfly host plant.

Sinocrassula yunnanensis (syn. Crassula) has tiny, pointed, black leaves covered in tiny silver hairs.

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.

Smilacina japonica 'Golden Dragon' has luscious golden leaves and white flowers on arching stems with red then purple fruit in fall. Very rare.

Smilacina japonica is a false Solomon's Seal with white flowers on arching stems with red then purple fruit in fall. 'Snow Dragon' has rare variegated leaves.

Dark red arching stems hold panicles of white flowers followed by red then purple fruits.

White flowers on arching stems with red then purple fruit in fall.

Solanum tuberosum 'Alaska Bloom' is an edible potato with yellow skin, creamy white flesh and shallow pink eyes. Matures early.

Solanum tuberosum 'Bellanita' is a versatile gourmet fingerling potato with excellent tasting yellow flesh and high yield.

Solanum tuberosum 'Chieftain' is an oval to oblong tuber with red skin and white flesh that matures mid-season.

Solanum tuberosum 'Innovator' is has yellow skin and flesh that are ideal for frying.