Shaw's Century Plant
Shiny Xylosma
Showy Milkweed
Shrimp Pink Aloe
Siberian Elm
Sideoats Grama
Silver Cloud Texas Sage
Silver Dollar Gum
Silver Dollar Prickly Pear
Silver Jade Plant
Silver Lace Society Garlic
Silver Mound Artemisia
Silver Mountain Gum
Silver Sage
Silver Wormwood
Siskyou Blue Fescue
Skyrocket Juniper
Smoke Tree
Smooth Agave
Snow White Flowering Tea Tree