One does not need a PhD in chemistry or botanics or horticulture, or genetics or anything else to know, for example:
* This cannabis was produced without the use of a potentially toxic pesticide.
* This cannabis has been treated with no other adulterant.
Even knowing very little about the specific properties of the cannabis one consumes, one can have a high degree of confidence that it will not cause harm if they have grown it themselves.
* This cannabis was produced without the use of a potentially toxic pesticide.
* This cannabis has been treated with no other adulterant.
Even knowing very little about the specific properties of the cannabis one consumes, one can have a high degree of confidence that it will not cause harm if they have grown it themselves.