John Doumitt - Financial & Engineering Expert

John Doumitt - Financial & Engineering Expert

Joey Ereñeta - Founder & Lead Consultant

Joey Ereñeta - Founder & Lead Consultant

Anthony DeMeo - Extraction & Infusion Expert

Anthony DeMeo - Extraction & Infusion Expert



The Let It Grow team is made up of cannabis industry experts in cGMP and cGAP cultivation and extraction/product manufacturing facility and equipment design, site and floor planning, detailed construction MEPs, financial modeling, business plans, state and local application writing, SOP development, product formulation and staff training/development. We have helped license and design large scale indoor, greenhouse and outdoor operations around the country.


Joey Ereñeta, our Founder and Lead Consultant, has been cultivating cannabis for 26 years, consulting for 14 years, and is the Horticulture Department Chair at Oaksterdam University, where he has been the Lead Horticulture Instructor since 2007. He has a wealth of experience assisting with and optimizing applications for state-permitted cultivation sites across the country. Joey brings extensive experience in cannabis cultivation, grow facility design & operations, state and local regulatory compliance, and the cannabis industry as a whole, and is a contributing author and editor for Ed Rosenthal's newest book on cannabis horticulture. He has consulted with commercial projects in California, Connecticut, Florida, Maryland, Massachusetts, Michigan, Minnesota, Missouri, Nevada, New Jersey, New Mexico, New York, Oklahoma, Pennsylvania, Rhode Island, Washington, Guam and Canada. For the last 26 years, Joey has committed his life to demystifying the stigma around this important plant medicine, and to educating and supporting the patients and individuals who benefit from its myriad therapeutic and healing effects.


John Doumitt, P.E., is our Financial, Engineering and Construction Management expert. He is the Founder, President, and Principal Consultant for Greenfield Solutions, where he helps clients in multiple industries to speed development of new commercial opportunities, anywhere in the world. John comes from decades in the pharmaceutical industry where he is an operations and business development leader with expertise in market analysis, planning and strategy. Since 1990, he has held management positions with medical services and logistics companies including Syncor International Corporation, Cardinal Health, Ingram Micro, Activus Healthcare, and HemaCare Corporation. He began his work in the cannabis industry in 2014, and has helped design, license, build, equip, commission and financially model commercial, cGMP cultivation, extraction and product manufacturing facilities all over the country. John is a professional engineer, and obtained a BS in Industrial & Systems Engineering from the University of Southern California and a Masters in Management from Purdue University.


Anthony DeMeo is our Extraction, Infusion and Product Manufacturing expert. He has helped cannabis businesses secure licensing, design and equip cGMP extraction/product manufacturing facilities, formulate a wide range of cannabis-infused products, and develop robust operating and compliance procedures. Anthony started his careeer in 2010 in the pharmaceutical industry where he worked for five years overseeing quality control and compliant operations for radio-nuclear pharmaceutical manufacturing at Cardinal Health, under the scrutiny of the FDA and Nevada Board of Pharmacy. His experience in the lab includes equipment calibration and working with gas and ion chromatographs, incubators, spectrophotometers, cyclotrons, and micropipettors, all in ISO 5 Cleanroom work environments. From 2014 to 2020, he was the Co-Founder & Lab Manager  for Green Therapeutics, a multi-license, commercial cannabis company in Nevada. In 2020, Anthony developed Oaksterdam University's extensive Extraction & Manufacturing Department curriculum, and in 2021 became the Department Co-Chair. He also currently serves as the Manufacturing Director for C4 Pharms, a multi-license commercial cannabis company in Missouri.










Joey's Cannabis Industry Experience:


2007 - Present: Founder | Let It Grow Consulting - San Francisco, CA

Let It Grow Consulting is a private consulting practice for individual patients, collectives and organizations working in states with medical cannabis laws. We specialize in indoor and outdoor grow design, set up, assessment, operations and training. Joey has been cultivating cannabis for 25 years, and has spent over 11 years teaching and consulting with individual medical marijuana patients, caregivers, and state-compliant cultivation and dispensing locations. Our consulting work focuses on optimizing applications for a state permit, and the design of the cultivation site, including facility and garden layout, equipment setup for lighting, ventilation, climate control, irrigation, nutrition, pest & pathogen control, and harvest/processing/quality control. We also assist in the assessment of staff, initial and on-going education and training, and periodic assessments of operations, budgeting, productivity and quality control.

Joey has worked with dozens of indoor and outdoor patient collectives and individuals in the State of California. He was a consultant and member of the Board of Directors for the San Francisco Patient and Resource Center (SPARC), San Francisco's premiere medical cannabis dispensary. He has been the consultant for applicants with facilities up to 90,000sf and several acres outdoors in California, Nevada, Pennsylvania, Rhode Island, Florida, Connecticut, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Jersey, New Mexico, New York, Oklahoma, Washington, Guam and Canada.


2007 - Present: Horticulture Department Chair and Lead Instructor | Oaksterdam University - Oakland, CA

Oaksterdam University, America's first cannabis college, was founded in 2007 to provide students from around the country, and the world, with the highest quality training for the cannabis industry. In the last 12 years, OU has taught over 40,000 students from over 30 countries about the history, law, science, cultivation, cooking and extraction of the cannabis plant, how to successfully and responsibly establish and operate a canna-business, and how to work locally and nationally for cannabis policy reform.

Joey began working as a horticulture instructor at Oaksterdam University in December 2007, shortly after it was founded. At that time, he taught the Horticulture 101 class, which focuses on introducing students to basic concepts of cultivating the cannabis plant. Topics include "Safe and Responsible Growing" practices, the "Plant Lifecycle" including nutrition, irrigation and grow medium choices, and basic "Lighting and Ventilation" design. At that time, he also assisted the attorney-instructors in educating the students about their Constitutional rights, state vs. federal cannabis law, and how to respectfully interact with law enforcement.

 In 2008, Oaksterdam University moved to a larger building to accommodate the overwhelming influx of new students. At that time, OU began offering semester classes and weekend packages with an ever-expanding curriculum. Joey began teaching a weekly "Grow Lab" to accompany these 13-week semester courses, allowing the students to follow the plant from seed to harvest. As demand for cultivation classes grew, Joey personally built the curriculum for a 10-week Advanced Indoor Horticulture Semester, where students received in-depth and hands-on cannabis cultivation education and training to design their own personalized cultivation site. These quickly became OU's most popular classes.

In 2009, Oaksterdam University moved to an even larger, 30,000 square foot building replete with a 100-student capacity lecture hall, a hands-on, living grow lab (which Joey designed), testing lab, and teaching kitchen. During this time, Joey became the Lead Horticulture Instructor and has since been responsible for developing and implementing all new cultivation class curricula. Since then, he continues to teach most of OU's classes on cultivation, and grow room design/operations. He developed an array of new classes, including Organic Cultivation, Basic and Advanced Grow Room Design, Pest and Pathogen Prevention & Treatment, Electrical Safety, Beneficials and Compost Teas, and Anatomy, Physiology and Conditions for Optimal Growth, including concepts and methods for optimizing photosynthetic rate, transpiration, and CO2/water/nutrient availability and uptake.

In 2012, Oaksterdam University moved to its current location and in the pursuant 7 years, OU has expanded its classes to include an Outdoor Cultivation Semester, including Site Selection, Land Prep, Strain Selection, Irrigation, Organics and Soil Science, and Greenhouse Gardening. OU also offers a 5-day weekend Cultivation Seminar (both in Oakland, Las Vegas and in traveling seminars around the country), where students receive a breadth of instruction on designing, equipping, and operating a cultivation site. Many of these students have been from states with new cannabis laws and are currently applying for dispensary and cultivation permits.

In 2019, Joey became the Horticulture Department Chair. During Joey's tenure at Oaksterdam University, he has worked alongside numerous industry leaders and been thoroughly educated about nearly every facet of the cannabis industry. One of Joey's esteemed colleagues, author and Oaksterdam University instructor, Ed Rosenthal, is recognized as the international authority on cannabis cultivation. Ed has commissioned Joey to co-author and edit his newest book on cannabis horticulture.


2020 - Present: Cultivation Director | C4 Pharms - Carrollton, MO

 In 2019, The entire Let It Grow Consulting team partnered with C4 Pharms to help with their license applications and facility design in the Missouri medical cannabis market. We won all four licenses (3 cultivation and 1 manufacturing) and immediately began build out of our 40,000sf facility. Despite the limitations of the COVID-19 pandemic, we launched the facility in record time and are the premiere producer of cannabis biomass in the state. Joey continues to direct, train and guide the success of this rapidly-growing company.


2017 - 2019: Cultivation Director | Terra Luna Farms - Sonoma County, CA

In early 2017, Joey teamed up with SPARC, the Bay Area's premiere cannabis dispensary, to launch an exciting new project in the heart of California's famous wine country - Sonoma's Valley of the Moon. This 400-acre property will become a model for collaborative and highly sustainable cannabis cultivation. In under 2 years, Joey was able to get Terra Luna Farms the coveted Biodynamic Certification from the Demeter organization, the world's oldest sustainable certification held by a very select group of worldwide farms. During this time, Joey helped Terra Luna Farms and nearby, cooperative farmers to get local and state authorization under California's new Medical and Adult Use Cannabis Regulation and Safety Act, and helped to pass Sonoma County's first major cannabis regulatory changes, allowing for central Processing licenses, similar to the wine industry's central grape crush model.


2014 - 2018: Chief Operations Officer & Owner | Green Therapeutics - Las Vegas, NV

In 2014, Joey teamed up with Oaksterdam alumni Dr. Duke Fu (Radio-nuclear Pharmacist), Dr. Druce Fu (Emergency Room Director), and Dr. Amy Fu (Managing Pharmacist - Walgreens) to form Green Therapeutics (GT) and apply for Nevada state cannabis licenses. GT won four state medical cannabis licenses (two cultivation and two production) for two facilities - 8,000 s.f. in Unincorporated Clark County and 35,000 s.f. in North Las Vegas. In 2017, GT was also awarded four more Nevada state adult-use cannabis licenses. Green Therapeutics' mission is to cultivate, extract and manufacture premium-grade cannabis flowers and products for the cannabis connoisseur. Using state of the art technologies, GT is a model for the future of medical and adult-use cannabis cultivation, extraction and product manufacturing.


2006 - 2009: Manager | Oaksterdam Nursery: Oakland, CA 94612

         The Oaksterdam Nursery was founded in 2005 in order to produce high quality, cannabis stem cuttings and new seed hybrids for medical patients in California. Joey began working at the Oaksterdam Nursery in 2006 as a Propagation Manager. He initially helped build and operate the nursery's expanded cultivation site. He was then responsible for maintaining a healthy stock of mother plants for every variety of cannabis in our catalog, and for helping to produce thousands of propagated plants on a weekly basis. Along with his cultivation duties, Joey was also positioned at the local dispensary, Coffee Shop Blue Sky, one of four medical marijuana dispensaries licensed by the City of Oakland, CA. There, he assisted patients in selecting appropriate plant varieties and educated them about proper plant care. Joey worked at the Oaksterdam Nursery until mid-2009, when he switched to full-time teaching and consulting.


2005 - 2013: Master Gardener & Consultant | Dr. Puppy Patient Collective: Upper Lake, CA 95485

         The DPPC is a collective of medical cannabis patients who, pursuant to California medical marijuana law, joined cooperatively to cultivate their own medical cannabis. DPPC founded the collective in May 2005, and operated outdoor and greenhouse cultivation sites using solar power and organic cultivation techniques, nutrients and pesticides. For the collective, Joey was the designer and master gardener (2005), and in subsequent years was an ongoing consultant, harvest manager, and patient liaison.


1994 - 1996: Grower and Volunteer | Cannabis Action Network: 1605 Ashby Ave Berkeley, CA 94703

         Cannabis Action Network (CAN) educates the general public about the beneficial uses of cannabis. CAN also reaches out to medical cannabis users to empower them to protect their rights and safety. Strategies focus on grassroots education and outreach projects, using web-based tools, literature distribution, public events like trainings and conferences, and other forms of communication. CAN promotes a good neighbor and sensible cannabis use campaign, and teaches people about their constitutional and juror rights.

Joey began collaborating with the Cannabis Action Network in 1994, while a freshman at U.C. Berkeley. At the time, CAN was providing care and free medicinal cannabis to local patients with debilitating diseases. Joey, CAN and other local advocates also worked to petition the Berkeley and Oakland City Councils to make possession of small amounts of cannabis the Lowest Law Enforcement Priority in those cities. This successful effort to decriminalize marijuana, served as a stop-gap measure in the years preceding the passage of Proposition 215, the nation's first voter-approved, state medical marijuana law.