Evidence has been gathered suggesting that 3 crops a year could be grown in our State. Evidence indicated that this would yield between 27-38 tons dry weight of stalks per year depending on densities planted. Similarly, between 31 and 35 tons dry weight of stems and leaves could be obtained per year which could be used as animal forage. A subtropical seed hemp cultivar also grew well. Evidence suggested that 2 crops a year could be harvested and yields of about 2.5 tons of seed could be obtained per acre per year.

Source: A little good news for those who want hemp to replace sugar on Maui | MauiTime

hmmmm.