Sulfur Flower Buckwheat
Summer Coreopsis
Summer Gold Lily of the Nile
Summer Lobelia
Summer or Giant Snowflake
Summer Snow Hybrid Tea
Sun Camellia Chansonette
Sun Rose
Sunburst Honey Locust
Sundowner Flax
Sunset Foxglove
Sunset Bush Manzanita
Suzanne Weigela
Sweet Bay
Sweet Bay, Grecian Laurel
Sweet Broom, Florists' Broom
Sweet Mock Orange
Sweet Violet, English Violet
Sweet William
Swiss Mountain Mugho Pine