Sambucus nigra Golden Tower is has a columnar form clothed in dissected golden and lime green foliage.

'Haschberg' is a top variety of Sambucus nigra or black elderberry with abundant clusters of large, juicy, flavourful, bluish black berries.

Sambucus nigra Laced Up is the columnar version of Black Lace with strongly upright stems covered in deeply dissected, textural, purple-black foliage.

Sambucus nigra Sambuco is one of the most flavourful and tasty of the European black elderberries.

Sambucus racemosa Lemony Lace emerges with red-tinged new growth opening into finely dissected, bright gold foliage.

Sarcococca humilis Winter Gem has red buds and sepals which give the fragrant blooms a bicolour effect.

Sarracenia 'Bug Bat' is a carnivorous pitcher plant with red flowers and hoods atop tall, chartreuse-green pitchers.

Sauromatum giganteum is a weird aroid with large, arrow-shaped leaves and burgundy spathes with burgundy-black spadices.

Schisandra chinensis 'Eastern Prince' is a self-fertile five-flavour berry that can produce up to 20 pounds of fruit per vine.

Schizophragma hydrangeoides 'Moonlight' has 9" (23cm) clusters of flowers are ringed by flat lacy white bracts.

xSedoro ‘Blue Elf’ is the first inter-generic hybrid between Sedum and Orostachys. It has steel-blue tufted rosettes topped with tight clusters of dark-pink flowers that attract bees.

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.

Sinningia is a genus related to Gloxinia and African violets. 'Invasion Force' has pink, fragrant, tubular flowers atop felted foliage.

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.