Green-MockupDerek and Klaas Sharing Knowledge in Green: A Field Guide to Marijuana is required reading for a new generation of curious and sophisticated pot smokers

Wall Street Journal: Trying to Test Marijuana’s Potency

Cool Hunting Video: Cannatest

Seattle’s cannabis industry is surpassing Amsterdam’s

The Urban Grower Visiting with Klaas in Canada


UK Magazine Featured Picture During 25th High Times Cup 2012 Issue 6, page 15