 | Spiraea x billiardii | Billiard Spirea | | None Listed | Shrub 4 to 8 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Spiraea x bumalda | Bumald Spirea | | None Listed | Deciduous, Zone |
 | Spiraea x vanhouttei | Vanhoutte Spirea | | Dogwood & Common Shrubs | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Zone 3b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Stephanandra incisa | Cutleaf Stephanandra; Lace Shrub | | Low pH | Groundcover, Deciduous, Full sun, Part shade, Zone 5a, Requires acid (pH 5.0 to 7.0) |
 | Stewartia pseudocamellia | Japanese Stewartia | | Rosaceous & Flowering Trees | Tree < 30 feet, Shrub > 8 feet, Deciduous, Full sun, Part shade, Zone 5b, Requires acid (pH 5.0 to 7.0) |
 | Styphnolobium japonicum | Japanese Pagoda Tree; Scholar-Tree | | Dry Site Plants, Campus trees walk | Tree > 30 feet, Deciduous, Full sun, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
 | Styrax japonicus | Japanese Snowbell | | None Listed | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
 | Styrax obassia | Fragrant Snowbell | | None Listed | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 5a, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
 | Symphoricarpos albus | Common Snowberry | | None Listed | Shrub 4 to 8 feet, Shrub < 4 feet, Deciduous, Full sun, Part shade, Zone , Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Symphoricarpos orbiculatus | Coralberry; Indian Currant | | None Listed | Deciduous, Zone |
 | Symphoricarpos x chenaultii | Chenault Coralberry | | None Listed | Deciduous, Zone |
 | Syringa meyeri 'Palibin' | Palibin Meyer Lilac | | Flowering Landscape Shrubs | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Syringa pekinensis | Pekin Lilac | | | Tree < 30 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to neutral soil (pH 5.0 to 7.4), Tolerates salty soil |
 | Syringa pubescens subsp patula 'Miss Kim' | Manchurian Lilac | | Flowering Landscape Shrubs | Shrub > 8 feet, Deciduous, Full sun, Part shade, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Syringa reticulata | Japanese Tree Lilac | | Dry Site Plants | Tree < 30 feet, Deciduous, Full sun, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
 | Syringa villosa | Late Lilac | | | Shrub > 8 feet, Deciduous, Full sun, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Syringa vulgaris | Common Lilac | | Flowering Landscape Shrubs | Shrub > 8 feet, Deciduous, Full sun, Zone 3b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Syringa x chinensis | Chinese Lilac | | None Listed | Shrub > 8 feet, Deciduous, Full sun, Zone , Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Taxodium distichum | Bald Cypress | | Wet Site Plants | Tree > 30 feet, Deciduous, Full sun, Zone 5b, Requires acid (pH 5.0 to 7.0), Tolerates salt spray, Tolerates salty soil |
 | Taxus baccata | English Yew; Common Yew | | | Tree > 30 feet, Evergreen, Full sun, Part shade, Shade, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
