| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Sambucus canadensis | Plant | -- | 12700.0 | 1.4 | * |
| Parthenium integrifolium | Plant | -- | 10500.0 | -0.4 | * |
| Vinca minor | Plant | -- | 9700.0 | -1.0 | * |
| Helianthus annuus | Leaf | -- | 5500.0 | * | |
| Helianthus annuus | Shoot | -- | 2600.0 | * | |
| Taraxacum officinale | Root | 1300.0 | 1950.0 | 1.7 | * |
| Ficus carica | Bark | -- | 1220.0 | * | |
| Sambucus nigra | Root | -- | 540.0 | -0.3 | * |
| Cichorium intybus | Root | -- | 420.0 | -0.5 | * |
| Vitex agnus-castus | Root | -- | 110.0 | -0.9 | Jim Duke's personal files. |