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About this Organization

Since 2002, The GrandDaddy Purp Collective has been helping patients cope with their health challenges through their undying commitment to bring the highest quality medicinal products to patients in need. The facility was originally located in Oakland, then later relocated to Richmond, CA.

Ken and his team have overcome many challenges without ever losing sight of the goal: To alleviate pain and suffering by breeding, growing and sharing superior strains with patients that can find relief and comfort from their many years of hard work and development.

The Collective’s signature strain, the multiple-award winning “Grand Daddy Purp” has earned a reputation across the Golden State, and around the world, as one of the most medicinal strains ever experienced, bringing much needed relief and well-being to patients.


Ken Estes
Founder / President
Ken Estes is a cultivator and celebrated breeder. He is best known for developing the Granddaddy Purple strain, but he also has a number of clinics throughout the State of California. Ken was turned on to the therapeutic benefits of medical cannabis after being paralyzed from the waist down in a motorcycle accident. Later, he encountered a woman who was treating patients with medicated brownies and decided to follow a similar life path. Estes became an activist for medical marijuana, working with Dennis Peron at one point in time. Now, he is best known for his work with the Granddaddy …

Awards Won (1) Are we missing any?

2012 HIGH TIMES Bay Area Medical Cannabis Cup Best Hybrid (Ken's Phantom)

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DISCLAIMER: The professionals and companies described are not associated or affiliated with Medical Jane, and they may not endorse Medical Jane or the information provided. The names of other companies, products and services are the property of their respective owners.

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