Portrait of Ken Estes
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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 Purp Collective in Richmond.


Granddaddy Purple Collective
Founder / President
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 …

In The News

May 27, 2014

Candyland Strain: A Mellow Hybrid From Northern California
Bred by Ken Estes, the Candyland strain (often referred to as Grandaddy Candyland) is one of the most popular hybrids to hit the California collective scene since the Girl Scout Cookies strain first came to light. Sure enough, they’re related. Candyland Strain: Bay Platinum Cookies X GDP I came across this batch of the Candyland strain on my recent trip to SFVDM in Van Nuys, CA. After being on the prowl for a good batch of this strain for months, I couldn’t be more excited to …

March 04, 2014

Ken’s Grand Daddy Purple (GDP): A Strong Sleep-Aid
Bred by Ken Estes, the Granddaddy Purple (GDP) strain is a strong, Indica-dominant hybrid that has become incredibly popular since its release. It is best known for its distinct berry taste and pain-relieving effects. Ken’s GDP Strain: Big Bud X Purple Urkle Indica lovers rejoice! Granddaddy Purple (or GDP) genetics can be linked to the mix of Big Bud and Purple Urkle – each powerful Indica strains in their own right. Ken brought them together in his search for a strain that was …

March 03, 2014

The Ken’s Kush Strain Grown By Kyle Kushman, Buds And Roses
Bred by Ken Estes, the Ken’s Kush strain is a subtle mix of two classic California hybrids. This batch in particular was grown by Kyle Kushman and the team at Buds and Roses Collective. Ken’s Kush Strain: Grand Daddy Purple X OG Kush As mentioned, the Ken’s Kush strain was the result of crossing the legendary Grand Daddy Purple strain with the ever-popular OG Kush strain. Interestingly, the end result may be slightly different from what you would expect. As we …

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.