Better Knowledge. Better Decisions.
Successful cultivation is not about copying a feeding chart or buying the most expensive equipment. It begins with understanding the plant.
The Master Grow Class with Bob Calkin brings the essential principles of cannabis cultivation together in one clear, professionally presented live course. Across a complete day of education, Bob explains how genetics, environment, light, water, nutrition, plant health and grower decisions work together.
The class is designed to replace confusion with understanding. Rather than offering one rigid growing formula, it helps attendees recognise what their plants are communicating and respond appropriately.
No exaggerated promises. No unexplained jargon. No assumption that everyone in the room is already an expert — just practical education that can help growers make more informed decisions.
From the First Decision to the Final Harvest
The class follows the natural progression of the plant, giving attendees a practical framework they can apply to different cultivation methods and growing environments.
Understand why genetics matter, how plant characteristics differ and what growers should consider before beginning a cultivation project.
Explore the foundations of strong early growth — seed starting, cloning, root development and the importance of stable conditions from the beginning.
Learn how temperature, humidity, airflow, light and available space affect plant development.
Understand watering habits, nutrient requirements, pH, common feeding mistakes and why more is not always better.
Explore practical methods for managing structure, improving airflow, using available light and maintaining a workable cultivation space.
Learn how to identify early warning signs, reduce preventable problems and develop a cleaner, more consistent growing routine.
Understand the transition into flowering, the final stages of plant development and the considerations involved in determining harvest readiness.
Explore the principles of drying, curing, storage and protecting the quality of a completed harvest.
Every event recognises that laws differ between territories. The class encourages responsible practices and compliance with the laws applicable in each host country.
Attendees can ask Bob about the principles covered during the day and gain further clarity on common cultivation problems.
The Master Grow Class provides general horticultural education. It is not legal, medical or patient-specific advice.
Start Where You Are. Leave Knowing More.
The programme has been designed to remain accessible to new growers while providing useful insight for attendees with practical experience.
Build a solid foundation before investing in equipment or making avoidable early mistakes.
Improve consistency, understand recurring problems and strengthen the decision-making behind an existing setup.
Develop a clearer understanding of cultivation fundamentals and responsible plant care. The programme does not replace professional medical advice.
Explore plant health, environmental management and cultivation through the perspective of a specialist crop.
Gain broader cultivation knowledge relevant to retail, customer education, equipment, nutrients, media and emerging regulated markets.
Use the class as shared professional development and an opportunity to compare practices outside the normal working environment.
You do not need previous cultivation experience to attend.
A Full Day Built Around Learning
The Master Grow Class combines professional presentation, visual content, practical explanations and direct audience questions.
Exact timings may vary by venue. The confirmed schedule will appear on each city’s ticket page.
Education Without the Ego
Bob Calkin is a veteran cannabis educator, author and advocate whose work has helped people better understand cultivation, cannabis culture and the developing legal industry.
His teaching style combines technical knowledge with direct, accessible communication. Complex subjects are broken into understandable principles without speaking down to beginners or oversimplifying the challenges involved.
Bob’s approach is based on helping people understand why a cultivation decision matters — not simply instructing them to repeat a process without context.
The Master Grow Class brings that experience into a focused live setting where attendees can learn directly, ask questions and connect the different stages of cultivation into one complete picture.
One Class. Several Ways to Attend.
Ticket availability and final pricing may vary between cities.
The complete in-person learning experience.
The most complete in-person experience.
Attend from home or from another country.
For teams, retailers, carers’ organisations and industry.
Selected tour dates may also offer an evening ticket for Stories from the Stash, the accompanying live comedy production. The comedy show is an optional addition and is not required to attend the Master Grow Class.
Find Your Nearest Master Grow Class
The Master Grow Class is being developed for theatres, conference venues, education spaces, exhibition centres and selected industry events.
New Dates Are Being Prepared
Register to receive city announcements, ticket-release details and livestream information.
Reach an Audience Investing in Better Cultivation
Audience profiles, placement examples, partnership levels and the full deck live in our partner area.
Bring the Master Grow Class to Your Market
The Master Grow Class provides promoters, venues, festivals and trade events with a distinctive daytime education product supported by multiple ticket options, partnership opportunities, merchandise and digital content potential.
The touring format is designed to work within theatres, conference venues, hotel ballrooms, exhibition spaces and selected educational environments.
Learn Responsibly
The Master Grow Class is an educational event. Attendance does not authorise the cultivation, possession, distribution or consumption of cannabis in any territory.
Every attendee is responsible for understanding and complying with the laws applicable to their own location.
No cannabis is included with any ticket. Any displayed products, demonstrations or partner activations must comply with local legislation and venue policy.
Build Your Knowledge
From the Ground Up
Spend one complete day learning directly from Bob Calkin and leave with a clearer understanding of the entire cultivation cycle.
For class, promoter and production enquiries:
booking@stonewheatagency.com
From Seed to Success
Also from the producers: Stories from the Stash
The Master Grow Class provides general education only. Local laws apply. It does not sell, supply or facilitate access to cannabis or any controlled substance, and is strictly 18+. © 2026–2028 Master Grow Class. All rights reserved.