| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Rehmannia glutinosa | Root | 3000.0 | 9000.0 | 2.7 | * |
| Rosmarinus officinalis | Leaf | 1720.0 | 5335.0 | -1.7 | USDA's Ag Handbook 8 and sequelae) |
| Salvia officinalis | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Sambucus canadensis | Fruit | 300.0 | 1485.0 | -0.9 | * |
| Santalum album | Fruit | -- | -- | * | |
| Secale cereale | Seed | 7110.0 | 7985.0 | -0.5 | USDA's Ag Handbook 8 and sequelae) |
| Sechium edule | Fruit | 560.0 | 8000.0 | 1.7 | * |
| Senna obtusifolia | Seed | -- | 6500.0 | -0.8 | * |
| Sesamum indicum | Seed | 5510.0 | 14802.0 | 1.0 | * |
| Sinapis alba | Seed | 11870.0 | 12700.0 | 0.5 | * |
| Solanum melongena | Fruit | 420.0 | 6815.0 | 1.2 | * |
| Solanum tuberosum | Tuber | 1140.0 | 5700.0 | 0.2 | * |
| Spinacia oleracea | Plant | 1420.0 | 16864.0 | 0.6 | USDA's Ag Handbook 8 and sequelae) |
| Stachys officinalis | Shoot | -- | -- | * | |
| Theobroma cacao | Seed | -- | 10400.0 | 0.1 | ANON. 1948-1976. The Wealth of India raw materials. Publications and Information Directorate, CSIR, New Delhi. 11 volumes. |
| Thymus vulgaris | Plant | -- | -- | Stitt, Paul. Why George should eat broccoli. | |
| Tilia sp. | Flower | -- | -- | * | |
| Trigonella foenum-graecum | Seed | 8720.0 | 11220.0 | 0.2 | * |
| Triticum aestivum | Seed | 3036.0 | 3542.0 | -1.4 | * |
| Urtica dioica | Leaf | -- | -- | Jim Duke's personal files. |