Sneezeweed (spp.) Sneezeweed, Common (spp.)
Sneezeweed, Orange Sneezeweed: Helenium , Common 'Bruno'
Sneezeweed: Helenium , Common 'Coppelia' Sneezeweed: Helenium , Common 'Mardi Gras'
Sneezeweed: Helenium , Common 'Moerheim Beauty' Sneezewort 'Nana Compacta'
Sneezewort 'The Pearl' 'Snow Bunting' Hellebore
'Snow Cap' False Rockcress 'Snow Cushion' Bushy Aster
'Snow Flurry' Bushy Aster Snow in Summer (spp.)
Snow in Summer 'Yo Yo' 'Snow Lady' Shasta Daisy
'Snow Queen' Hybrid Clematis 'Snow Queen' Joseph's Coat: Alternanthera
Snow Shrimp Plant Snow Trillium
'Snow White' Fleabane Snowball Cactus
'Snowbank' False Chamomile: asteroides 'Snowcap' Shasta Daisy
'Snowcap' Spiderwort: hybrid 'Snowden' Hosta
'Snowdrift' Fringed Bleeding Heart 'Snowdrift' Japanese Water Iris
Snowdrop Anemone (spp.) Snowdrop Anemone 'Elise Feldman'
Snowdrop Windflower (spp.) Snowdrop Windflower 'Elise Feldman'
Snowdrop, Common (spp.) Snowdrop, Common 'Flore-Pleno'
'Snowflake' Catmint 'Snowflake' Evergreen Candytuft
'Snowflake' False Chamomile: asteroides 'Snowflake' Moss Phlox
Snowflake 'Oporanthum' 'Snowflake Rose' Geranium: Pelargonium
'Snowflake' Water Hyssop Snowflake, Summer (spp.)
Snowflake, Water Snowflake, White
Snowflake, Yellow 'Snowsport' Common Yarrow
'Snowstorm' Dusty Miller: cineraria 'Snowtop' Hardy Gloxinia
Snowy Epimedium (spp.) Snowy Epimedium 'Niveum'
Snowy Wood Rush Grass 'So Lovely' Daylily
'So Sweet' Hosta Soap Aloe
Soap Tree Yucca Soapweed Yucca
Soapweed Yucca: glauca Soapwort (spp.)
Soapwort, Rock Society Garlic (spp.)
Society Garlic 'Silver Lace' Society Garlic Variegated
Soft Rush 'Gold Strike' Soft Shield Fern (spp.)
Soft Shield Fern 'Densum' Soft Shield Fern 'Plumosomultilobum'
Soft Shield Fern 'Rotundatum Cristatum' Soft Tip Yucca
'Solar Flare' Hosta Soldier Boy
Soldier Boy: orthopetala Soldier Boy: pallida
Soldier Boys Golden Solomon's Seal
Solomon's Seal 'Bill Baker Form' Solomon's Seal (spp.)
Solomon's Seal, Dwarf Solomon's Seal, Scented (spp.)
Solomon's Seal, Scented Variegated Solomon's Seal: humile, Dwarf
Somali Hemp 'Something Different' Hosta
'Song Sparrow' Daylily 'Sonora' Black-eyed Susan
'Sooner Gold' Daylily Sorrel, Four Leaf
Sotol, Common Sotol, Narrow-Leaf
Soup Mint (spp.) Sour Dock
'Sour Grapes' Bearded Tongue: Penstemon