| Plant | Low PPM | High PPM | StdDev | *Reference | |
|---|---|---|---|---|---|
| Oenothera biennis | Seed Oil | -- | -- | * | |
| Origanum vulgare | Plant | 1600.0 | 1723.0 | 1.0 | USDA's Ag Handbook 8 and sequelae) |
| Panax ginseng | Root | -- | -- | * | |
| Papaver somniferum | Seed Oil | -- | -- | * | |
| Papaver somniferum | Seed | 1300.0 | 1394.0 | -0.3 | * |
| Pastinaca sativa | Root | 30.0 | 145.0 | -0.7 | * |
| Persea americana | Fruit | 6430.0 | 25000.0 | 4.2 | USDA's Ag Handbook 8 and sequelae) |
| Phoenix dactylifera | Seed | -- | -- | Abstract (See species file) | |
| Pinus pinea | Seed | 2080.0 | 2230.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Pinus edulis | Seed | 2500.0 | 2655.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Pistacia vera | Seed | 2860.0 | 2975.0 | -0.2 | * |
| Pisum sativum | Fruit | -- | -- | * | |
| Portulaca oleracea | Herb | 140.0 | 2940.0 | * | |
| Prunus persica | Fruit | 10.0 | 80.0 | -0.3 | * |
| Prunus cerasus | Fruit | 10.0 | 72.0 | -0.3 | * |
| Prunus dulcis | Seed | 3040.0 | 3180.0 | -0.2 | USDA's Ag Handbook 8 and sequelae) |
| Prunus domestica | Fruit | 50.0 | 338.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Psidium guajava | Fruit | 30.0 | 216.0 | -0.3 | USDA's Ag Handbook 8 and sequelae) |
| Psidium cattleianum | Fruit | 30.0 | 155.0 | -0.3 | * |
| Pyrus communis | Fruit | 20.0 | 124.0 | -0.3 | * |