Silk & Heavy Hybrid Daylily
Silk Tree, Mimosa Tree
Silver Arrow Miscanthus
Silver Bush Lupine
Silver Carpet Lessingia
Silver Cloud Silverleaf
Silver Dollar Gum, Red Box Gum
Silver Jade Plant
Silver Lace Society Garlic
Silver Leaf Marguerite
Silver Maple
Silver Mound Artemisia
Silver Mountain Gum
Silver Sage
Silver Wormwood
Sky Flower
Skyrocket Juniper
Slender Deutzia
Smooth-edged Agave
Snapdragon