| Heptacodium miconioides | Seven-Son Flower | | Rosaceous & Flowering Trees | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Amelanchier spp. | Serviceberry; Shadblow | | Rosaceous & Flowering Trees | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 3b, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Picea omorika | Serbian Spruce | | Spruces and Firs et al. | Tree > 30 feet, Evergreen, Full sun, Part shade, Zone 4b, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Hippophae rhamnoides | Sea Buckthorn; Common Sea Buckthorn | | Flowering Landscape Shrubs | Shrub 4 to 8 feet, Shrub < 4 feet, Deciduous, Full sun, Part shade, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salt spray, Tolerates salty soil |
| Pinus sylvestris | Scotch Pine | | Pines et. al. | Tree > 30 feet, Evergreen, Full sun, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Ulmus glabra | Scotch Elm; Wych Elm | | High pH | Tree > 30 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Cytisus scoparius | Scotch Broom | | | Shrub 4 to 8 feet, Deciduous, Full sun, Zone 6b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salt spray |
| Quercus coccinea | Scarlet Oak | | Oaks | Tree > 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Pyracantha coccinea | Scarlet Firethorn; Laland Firethorn | | | Shrub > 8 feet, Shrub 4 to 8 feet, Evergreen, Full sun, Part shade, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Quercus acutissima | Saw-tooth Oak | | Oaks , Campus trees walk; Oaks | Tree > 30 feet, Deciduous, Full sun, Zone 5b, Can tolerate acid to neutral soil (pH 5.0 to 7.4), Tolerates salty soil |
| Juniperus sabina | Savin Juniper | | Evergreens with Scales | Shrub < 4 feet, Groundcover, Evergreen, Full sun, Zone 3b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salt spray |
| Magnolia x soulangiana | Saucer Magnolia | | Spring Flowering Trees and Shrubs; Birch, Larch, Magnolias and Nut Trees at Arboretum | Tree < 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Sassafras albidum | Sassafras | | Maples, Beeches and Others | Tree > 30 feet, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
| Viburnum sargentii | Sargent Viburnum | | None Listed | Deciduous, Zone |
| Malus sargentii | Sargent Crabapple | | None Listed | Tree < 30 feet, Shrub > 8 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
| Prunus sargentii | Sargent Cherry | | Rosaceous & Flowering Trees | Tree > 30 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to neutral soil (pH 5.0 to 7.4), Tolerates salty soil |
| Salix candida | Sageleaf Willow; Hoary Willow | | None Listed | Shrub < 4 feet, Deciduous, Full sun, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Perovskia atriplicifolia | Russian Sage | | Dry Site Plants | Shrub < 4 feet, Groundcover, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
| Elaeagnus angustifolia | Russian Olive | | | Tree > 30 feet, Deciduous, Full sun, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salt spray, Tolerates salty soil |
| Microbiota decussata | Russian Arborvitae; Siberian Cypress | | Evergreens with Scales | Groundcover, Evergreen, Full sun, Part shade, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |