 | Corylus colurna | Turkish Filbert; Turkish Hazel | | High pH, Campus trees walk | Tree > 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Cotinus coggygria | Smoke Tree; Smokebush | | Dry Site Plants | Shrub > 8 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Cotinus obovatus | American Smoketree | | Dry Site Plants | Tree < 30 feet, Shrub > 8 feet, Deciduous, Full sun, Zone 5b |
 | Cotoneaster adpressus | Creeping Cotoneaster | | None Listed | Shrub < 4 feet, Groundcover, Deciduous, Full sun, Part shade, Zone 4b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Cotoneaster apiculatus | Cranberry Cotoneaster | | Spring Flowering Trees and Shrubs, Zone 6 & 7 Plants plus shrubs | Shrub < 4 feet, Groundcover, Deciduous, Full sun, Part shade, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
 | Cotoneaster dammeri | Bearberry Cotoneaster | | Spring Flowering Trees and Shrubs | Groundcover, Evergreen, Full sun, Part shade, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Cotoneaster divaricatus | Spreading Cotoneaster | | Spring Flowering Trees and Shrubs | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Cotoneaster horizontalis | Rockspray; Rock Cotoneaster | | | Shrub < 4 feet, Groundcover, Deciduous, Full sun, Part shade, Zone 5b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Crataegus crus-galli | Cockspur Hawthorn | | Rosaceous & Flowering Trees | Tree < 30 feet, Deciduous, Full sun, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
 | Crataegus laevigata | English Hawthorn | | None Listed | Tree < 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Crataegus lavallei | Lavalle Hawthorn | | None Listed | Tree < 30 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Crataegus phaenopyrum | Washington Hawthorn | | Rosaceous & Flowering Trees | Tree < 30 feet, Deciduous, Full sun, Zone 4b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
 | Crataegus punctata ‘Ohio Pioneer’ | Ohio Pioneer Hawthorn | | None Listed | Tree < 30 feet, Deciduous, Full sun, Part shade, Zone 4a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Crataegus viridis 'Winter King' | Winter King Hawthorn | | Rosaceous & Flowering Trees | Tree < 30 feet, Deciduous, Full sun, Zone 5a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0), Tolerates salty soil |
 | Cryptomeria japonica | Japanese Cryptomeria; Japanese Cedar | | Evergreens with Scales | Tree > 30 feet, Evergreen, Full sun, Part shade, Zone 6a, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
 | 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 |
 | Daphne mezereum | February Daphne | | None Listed | Shrub 4 to 8 feet, Deciduous, Full sun, Part shade, Zone 4a, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
 | Daphne x burkwoodii 'Carol Mackie' | Carol Mackie Daphne | | Flowering Landscape Shrubs | Shrub < 4 feet, Deciduous, Full sun, Part shade, Zone 4b, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Dasiphora (Potentilla) fruticosa | Shrubby Cinquefoil | | Flowering Landscape Shrubs | Shrub < 4 feet, Deciduous, Full sun, Zone 3a, Can tolerate acid to alkaline soil (pH 5.0 to 8.0) |
 | Davidia involucrata | Dove Tree | | Low pH | Tree > 30 feet, Deciduous, Full sun, Part shade, Zone 6b, Can tolerate acid to neutral soil (pH 5.0 to 7.4) |
