-S-
| Plant | Origin | Zone | Height | Type | D/M/W |
| Sabal causiarum - Puerto Rican Hat Palm | Hispaniola - Puerto Rico | 08-11 | 12M | Shade | Moist |
| Sabal dominguensis | Cuba - Hispaniola | 08-11 | 12M | Shade | |
| Sabal etonia | Florida | 8-11 | 2.5M | Shade | Moist |
| Sabal maritima | Cuba-Jamaica | 9-11 | 25M | Shade | Moist |
| Sabal mauritiiformis | Mexico-Columbia-Venezuela | 9-11 | 30M | Shade | Moist |
| Sabal mexicana - Texas Palmetto | Texas-Mexico-El Savador | 8-11 | 15M | Shade | Moist |
| Sabal minor - Dwarf Palmetto | SE America | 6-11 | 4M | Shade | Moist |
| Sabal palmetto - Palmetto Palm | Southeast America-Bahamas-Cuba | 8-11 | 25M | Shade | Moist |
| Sabal sp. | |||||
| Saccharum officinarum - Sugar Cane | |||||
| Salacca magnifica | Borneo | 10B-11 | 5M | Clumping Palms | Moist |
| Salacca sp | |||||
| Salacca wallichiana | Myanmar-Indonesia-Malaysia | 10B-11 | 7M | Clumping Palms | Moist |
| Salacca zalacca | Sumatra - Java | 10B-11 | 5M | Clumping Palms | Moist |
| Samanea saman - Rain Tree / Monkey Pod | West Indies | 10 | 24M | ||
| Samyda pubescens-Kase sek | Domincan republic | 3-4M | |||
| Sandoricum koetjape - Santol | India | 10-11 | 13M | ||
| Sapindus detergens - Soapberry | China, Japan | 9 | 15 M | ||
| Saraca declinata | Malaysia to Indonesia | 10B-11 | 12M | ||
| Saraca diversifolia | Southeast Asia | 10B-11 | 6M | ||
| Saraca indica - Asoka | Southeast Asia to Indonesia | 10B-11 | 9M | ||
| Saraca Kunstlerii | |||||
| Saraca palembianca | |||||
| Saraca sp. | 10B-11 | 6M | |||
| Saraca thaipingensis | Mayasia to Penninsula | 10B-11 | 7M | ||
| Satakentia livkivensis 'Marv' | Ryukyu Archipelago | 10B-11 | 20M | Shade | Moist |
| Schaefferia frutescens - Florida Boxwood | Tropical America | 10-11 | 7 M | ||
| Scheelea phalerata | 10-11 | ||||
| Scheelea spp | 10-11 | ||||
| Schefflera actinophylla amate - Shefflera | Queenland, North Gun | 11-12 | 30M | ||
| Schefflera arboricola - Dwarf Shefflera | Taiwan | 10 | 4M | ||
| Schefflera arboricola Nora - Nora | |||||
| Schefflera elegantissima | |||||
| Schefflera magnifica - Thiland | Burma | ||||
| Schinus molle - Peppertree | Ecuador, Peru | 9-10 | 8M | ||
| Schippia concolor | Belize, Guatemala | 10-11 | 10M | Moist | |
| Schizolobium parahybum - Tower Tree | Brazil | 10-12 | 30M | ||
| Schotia brachypetala - Tree Fuschia | East Africa & South Africa | 10-11 | 15M | ||
| Senna siamea - Kissod Tree | Burma to Malaysia | 9-12 | 13M | ||
| Senna spectabilis - Calceolaria Shower | C&S America | 9-12 | 20M | ||
| Senna surattensis- Glaucous Cassia | |||||
| Serenoa repens - Saw Palmetto | Southeast America | 8-11 | 6M | Clumping Palms | Moist |
| Sesbania grandiflora - Hummingbird Tree | Tropical Asia, West Africa | 10 | 13M | ||
| Sesbania tripetti - Scarlet Wisteria | Brazil | 10 | 3M | ||
| Simarouba glauca - Paradise Tree | Central America | ||||
| Siphokentia beguinii - Moluccas | Moluccans Islands | 10B-11 | 7M | Shade | Wet |
| Siphokentia dransfieldii | Biak Island | 10B-11 | 7M | Shade | Wet |
| Socratea exorrhiza - Stilt Palm | South America | 11 | 25M | SS | |
| Socratea salizarii | Peru - West Brazil & Bolivia | 11 | 25M | SS | |
| Spathodea campanulata - Red African Tulip Tree | Tropical Africa | 10-13 | 20M | ||
| Spathodea campanulata - Yellow African Tulip Tree | 10B | 20M | |||
| Spondias dulcis - June Plum (cytherea) | Tahiti | 10 | |||
| Spondias venulosa - Spanish Plum (Monbin) / Hog Plum | Tropical America | 10 | 15M | ||
| Stangeria | 10 | ||||
| Stemmadenia litoralis | Central America | 10-11 | 4M | ||
| Sterculia apetala | Tropical America | 9-10 | 15M | ||
| Sterculia foetida - Indian Almond | East Africa | 10 | 20M | ||
| Strelitzia nicolai - White Bird Of Paradise | South Africa | 9-10 | 5M | ||
| Strelitzia reginae - Bird Of Paradise | South Africa | 10-11 | 2M | ||
| Strelitzia spp | South Africa |