The main difference between hemp and marijuana is the THC content. Marijuana has large amounts of this cannabinoid, which can reach levels of over 20%. Hemp, however, doesn’t contain more than the legally permitted 0.2%. In the past there were also certain differences in the appearance of the two plant species. This was due to the fact that hemp flowers were scarce and not very fragrant. However, the growth in popularity of CBD has enabled the creation of new hemp varieties. These have the same terpene profile as many marijuana strains, but without the psychoactive effects.