humboldt growers association
http://www.humboldtgrowers.org/
there's also a new one called emerald growers association but i don't know if they have a site yet. not unions but similar idea?
according to ganjaD the HGA was actaully supporting LIMITS on most peoples grows, reducing every grow outside of the special HGA to only 1200 watts indoor flower and 100 sq ft of canopy..
i will not support any attempts by a select few to monopolize this plant....
you dont see bullshit like this in the agricultural industry, only in pot because its so lucrative.