State statutes, with the exception of West Virginia, all have a blanket definition for Industrial Hemp

The definition of industrial hemp is a variety of cannabis with a THC concentration of no more than 0.3 percent. West Virginia defines hemp as cannabis with a THC concentration of less than 1 percent.

Many state definitions for industrial hemp specify the THC concentration is on a dry weight basis and can be measured from any part of the plants. Some states also require the plant to be possessed by a licensed grower for it to be considered under the definition of industrial hemp.