Q & A with grower Tim Cullen [interview by Mary Winter].

Tim Cullen is CEO and founder of the Colorado Harvest Company and Evergreen Apothecary, an expanding business in Denver that grows and sells marijuana. His most lucrative store averages 200 to 300 sales a day, with roughly 80 percent being for recreational purposes. The former high school biology teacher became interested in marijuana when he saw how it helped his father control the pain and nausea of Crohn's Disease, which Cullen himself developed later. He began growing marijuana in his basement in Colorado, where growing medical marijuana for personal use has been legal for 12 years. He now grows his plants in 55,000 square feet in four warehouses.