Most growers with permits must provide chemical, water volume, and method of growth to the municipal or state that oversees the operation. Of course, they probably hide 80% of the method, like injecting dangerous growth cocktails. You can only depend on their info. Otherwise, 99% of the time, you're buying blind without knowing what you're getting. Even the major growers are discovered to have unsavory practices. Oh, I got plenty of stories about those.