| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Hypericum perforatum | Leaf | 6.0 | 18.0 | -0.3 | * |
| Hypericum perforatum | Root | 4.0 | 5.0 | 0.6 | * |
| Cichorium endivia | Leaf | 4.0 | 4.8 | -0.6 | * |
| Brassica pekinensis | Leaf | 3.8 | 4.2 | -0.6 | * |
| Hypericum perforatum | Plant | 2.0 | 12.0 | -0.2 | * |
| Carya glabra | Shoot | 2.0 | 103.0 | 0.8 | * |
| Symphoricarpos orbiculatus | Stem | 2.0 | 176.0 | 2.3 | * |
| Cucumis melo | Fruit | 1.74 | 2.2 | -0.4 | * |
| Pinus echinata | Shoot | 1.7 | 63.0 | -0.3 | * |
| Asparagus officinalis | Shoot | 1.5 | 30.0 | -1.2 | * |
| Quercus velutina | Stem | 1.5 | 31.0 | -0.8 | * |
| Quercus rubra | Stem | 1.4 | 17.0 | -1.1 | * |
| Solanum melongena | Fruit | 1.4 | 1.6 | -0.4 | * |
| Sassafras albidum | Leaf | 1.0 | 34.0 | 0.1 | * |
| Urtica dioica | Leaf | 1.0 | 6.0 | -0.5 | ACTA AGRIC SCAND SUPPL 22: 1980 |
| Taraxacum officinale | Leaf | 0.8 | 10.0 | -0.4 | * |
| Carya ovata | Shoot | 0.7 | 46.0 | -0.8 | * |
| Phaseolus vulgaris | Seed | 0.7 | 1.0 | -0.4 | * |
| Quercus stellata | Stem | 0.7 | 59.0 | -0.2 | * |
| Juniperus virginiana | Shoot | 0.7 | 132.0 | 1.5 | * |