Gary Walker

Master Grower & Breeder

Gary is a sustainable practice specialist focusing on productivity improvement, environmental impact reductionand innovation implementation within the horticultural and agricultural industries.


Gary Walker | Founder | Pâtissier

Gary is the previous owner and lead grower of a successful organic farm, in Roswell, Georgia. 

During his ownership, Gary implemented sustainable practices, including scientifically supported techniques from both biodynamic and conventional farming approaches to ensure high-quality plants with above-average yields. 

In 2016, Gary transitioned his outdoor organic growing experience to the great indoors. Gary served as a consultant to cannabis companies looking to increase profitability, regulatory compliance, operations, sustainability, and involvement with the local community.


After consulting and prior to his current endeavors, Gary managed a Research and Development facility in Denver, Colorado for an agricultural technology company focusing on increasing commercial cannabis productivity.


In this role, Gary designed cannabis facilities for workflow optimization with a focus on biosecurity in order to increase profit margins within commercial cultivation centers.


Gary has also focused on developing standard operating procedures within the cannabis sector in order to reduce labor costs and increase systematic automated procedures.

Currently, Gary is an owner/operator at Greenstone Holdings, 

a cannabis flower cultivation facility in Denver, CO.

Gary is also part owner of a premier dispensary in Boulder, CO.


He thrives in this role, managing facility operations, functioning as the in house nutrient, ipm, environmental and compliance expert. In addition, he is also in charge of employee development which allows him to create top level grow teams. This position also affords him the opportunity to be both in the boardroom and in the grow room.


Greenstone Holdings

Greenstone Holdings is a cannabis flower cultivation facility located in Denver, Colorado focused on growing premium genetics with care and attention to detail.
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