Santa Cruz Island Buckwheat
Santa Cruz Rockrose
Saratoga Bay Laurel
Sargent Crab Apple
Sargent G. C. Juniper, Shimpaku
Saucer Magnolia, Tulip Tree
Saw-Leaf or Japanese Zelkova
Scalon Red Maple
Scandia Ground Cover Juniper
Scarlet Monkey Flower
Scarlet Pimpernel
Scottish Heather
Sea Lavender
Sea of Joy Bearded Iris
Sea Pink, Common Thrift
Sebastian Daylily
Semi-trailing Yellow Gazania
Sentinel Manzanita
Serbian Bellflower
Shademaster Honey Locust