The official answer is : PPM is the total heavy metal content of the entire product package as bought from the shelves.
This is an ultra organic, super soil bloom mix designed for cultivating smoke-able hemp. This is the 2nd part of the #OEGmethod mix. It also includes all the water in ingredients for the vegetative growth cycle. Join us down a long rabbit hole of a show. Hopefully you find some information which will help you to produce clean organic medicine in accordance with your legal state cultivation laws.