Minnesota is a better state for Hemp based CBD.

Here is a link to the legalization of hemp in each state.
http://www.ncsl.org/research/agricul...-statutes.aspx

Some try to over-ride federal law. (Maine, Colorado, California, Oregon) Others have legalized it if federal law legalizes it. Most states limit the cultivation of hemp to research purposes in line with federal law.

DavOD's links are fraught with errors and misrepresentations. The Westword link has the least. They are all written in true marketing style. For example, the <0.3% THC is a restriction, not a characteristic of all hemp. The EU only allows <0.2% THC by dry weight. Only hemp with less than 0.3% THC can be grown according to the federal Farm Bill terms. Hemp growers need to use appropriate strains of hemp to stay below the threshold. They must use certified seed that tests to show the plants meet the <.3% THC limit.

Extensive research has been done to find the strains that will not exceed the 0.3% US or 0.2% EU limits. These limits are a misnomer. A <0.2% THC strain only has 1.3 to 1.6% CBD. This leaves a ratio or 1:9 to 1:20 THC:CBD ratio. The 1:20 ratio of THC to CBD is shown to have the best therapeutic value.
Here is one study.
https://www.votehemp.com/PDF/VariationOfTHCContent.pdf

With the complexity of hemp THC:CBD values, it is easy to see why Congress and the FDA are dragging their feet.