Spring Beauty: virginica 'Spring Carnival' Japanese Tree Peony
'Spring Charm' Fringed Rockcress Spring Cinquefoil
Spring Crocus 'Spring Fling Rose Improved' Trailing Petunia
Spring Heath 'Springwood White' Spring Meadow Saffron
'Spring Star' Carnation: Dianthus Spring Starflower (spp.)
Spring Starflower 'Rolf Fiedler' Spring Starflower 'Wisley Blue'
'Spring Symphony' Foamflower: Tiarella 'Spring Wedding' Longspur Epimedium
'Springtime' Red Hot Poker 'Springwood White' Scotch Heath
'Sprite' Dwarf Astilbe 'Spritzer' Hosta
Spur Flower 'Lois Woodhull' Spur Flower 'Nicodemus'
Spur Flower 'Nicolleta' Spur Flower 'Old Gold'
Spur Flower 'Zulu Wonder' Spured Snapdragon 'Canon J. Went'
Spurge Alleghany Spurge 'Breonii'
Spurge 'Chameleon' Spurge, Albanian (spp.)
Spurge, Albanian 'Portuguese Velvet' Spurge, Almond 'Purpurea'
Spurge, Canary Island Spurge, Candelabra
Spurge, Caucasian Spurge, Cushion
Spurge, Cypress Spurge, Fireglow 'Fireglow'
Spurge, Flowering Spurge, Ghost
Spurge, Griffith's 'Fireglow' Spurge, Mediterranean (spp.)
Spurge, Mediterranean 'Portuguese Velvet' Spurge, Milk Barrel
Spurge, Prostrate Spurge, Robb's
Spurge, Silver Spurge, Wallich
Spurge, Wild Spurge, Wood 'Purpurea'
Spurge: amygdaloides robbiae, Wood Spurge: characias wulfenii, Mediterranean
Spurge: coerulescens Spurge: Euphorbia 'Blackbird'
Spurge: Euphorbia 'Diamond FrostŪ' Spurge: Euphorbia 'Excaliber'
Spurge: Euphorbia 'Golden Tower' Spurge: horrida
Spurge: lambii Spurge: martiniihybrid
Spurge: muirii Spurge: myrsinites
Spurge: palustris Spurge: schillingii
Spurred Snapdragon (spp.) Squash: pepo
Squill Squill, Portuguese
Squill, Siberian Squill, Silver (spp.)
Squill: bifolia Squirrel Fern
Squirrel's Foot Fern Squirreltail Barley
Squirting Cucumber St. Augustine Grass Variegated
St. Catherine's Lace St. James Lily 'Superba'
St. John's Lily St. Johnswort 'Tricolor'
'St. Louis Gold' Waterlily St. Martin's Flower (spp.)
St. Mary's Thistle St. Peter's Palm (spp.)
St. Peter's Palm 'Bright Edge' St. Peter's Palm 'Color Guard'
St. Peter's Palm 'Golden Sword' St. Peter's Palm Variegated
St.Johnswort, Bushy Staghorn Fern
Staghorn Fern: elephantotis Staghorn Fern: grande
Staghorn Fern: superbum Stalked Aeonium