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About Ed Rosenthal Speaking, Events and Consulting Zero Tolerance Contact International Cannabis Business Conference The Hash Marihuana & Hemp Museum Amsterdam Green Aid: The Medical Marijuana Legal Defense and Education Fund Quantum 9 Marijuana Consulting
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The Guru of Ganja

CANNABIS CULTIVATION

Curious about indoor cannabis cultivation? Read my blog or sign up for my newsletter. We will study hydro and soil indoor cannabis cultivation in my free online class of 2025.

Featured
Purple Caper Semi-Autos: The Must-Try Cannabis Genetics for Home Growers
Cannabis Breeding, Cannabis Cultivation
Purple Caper Semi-Autos: The Must-Try Cannabis Genetics for Home Growers
Cannabis Breeding, Cannabis Cultivation

If you’re a home grower looking for faster harvests, bigger yields, and resilient outdoor cannabis strains, it’s time to get familiar with semi-autos, also known as fast photoperiod cannabis or quick photos.

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Cannabis Breeding, Cannabis Cultivation
How to Identify, Prevent, and Treat Powdery Mildew on Cannabis Plants
Cannabis Cultivation
How to Identify, Prevent, and Treat Powdery Mildew on Cannabis Plants
Cannabis Cultivation

Learn how to identify, prevent, and treat powdery mildew on cannabis plants. Discover how GrowSafe by Agromagen offers a natural, effective solution for growers.

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Cannabis Cultivation
Cannabis Indoor Growing Class: The Homestretch
Cannabis Cultivation
Cannabis Indoor Growing Class: The Homestretch
Cannabis Cultivation

Jackie and Christian are on the final stretch of their first indoor cannabis grow, and things are looking fantastic. The flowers are thriving, and they’re both eager to harvest and process the fruits of their labor.

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Cannabis Cultivation
Cannabis Indoor Growing Class - Prevention: a key word in Cannabis growing
Cannabis Cultivation
Cannabis Indoor Growing Class - Prevention: a key word in Cannabis growing
Cannabis Cultivation

Prevention is key in cannabis cultivation. Stopping mold and infestations early saves time and protects your plants. In our Vivosun tent experiment, we're using Grow SafeⓇ, an OMRI-certified, non-toxic, all-natural solution, powerful yet safe for organic cultivation. Stay proactive to ensure healthy, thriving plants and avoid costly issues before they start.

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Cannabis Cultivation

If you're interested in any Vivosun products, check out the Vivosun Shop! They’re running some fantastic sales, and with the promo code Ed420, you’ll get an exclusive 15% discount across all their products! 🌱🔥

 
 


 
 
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Magic Mushrooms
Top Ten Mushroom Spores by InoculateTheWorld
Top Ten Mushroom Spores by InoculateTheWorld

This blog dives into the fascinating world of Psilocybe cubensis strains, exploring the best options for homegrowers. As psychedelic laws and culture evolve, we take a closer look at landrace genetics and the origin stories behind some of today’s most unique and sought-after mushroom spores.

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The fine art of fungi cultivation
The fine art of fungi cultivation

Cultivating cannabis and psychedelic fungi has many similarities—and a number of differences. Both plants offer a unique experience upon consumption, a heightened reward that compels growers to work tirelessly in the hope the fruits of their labor will provide a blissful bounty.

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Going Underground : Paul Stamets On The Vast, Intelligent Network Beneath Our Feet
Going Underground : Paul Stamets On The Vast, Intelligent Network Beneath Our Feet

Mycologist Paul Stamets discusses mushrooms, and how mycelia perform important ecological roles: nourishing ecosystems, repairing them, and sometimes even helping create them. An in-depth interview with writer Derrick Jensen.

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Terence McKenna's Preface to ‘Psilocybin Magical Mushroom Grower’s Guide’
Terence McKenna's Preface to ‘Psilocybin Magical Mushroom Grower’s Guide’

Terence McKenna's truly the classic manual on home cultivation, the wisdom of Psilocybin: Magic Mushroom Grower's Guide continues to inspire new students of psycho-mycology—and refreshes psychedelic memories for others. Get yours >

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4 ways to make hashish at home

 
 
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Cannabis and your health

The Guru of Ganja Blog
Why Opioids Can Kill and Why Natural Cannabinoids and Cannabis Do Not
Why Opioids Can Kill and Why Natural Cannabinoids and Cannabis Do Not

Learn about the pharmacological concept of binding affinity and why opioids can cause respiratory arrest and death and the natural cannabinoids in cannabis do not. By Uwe Blesching, Ph.D.

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Cannabis as an Effective Pain Reliever: Uwe Blesching’s Evidence-Based Response to the Opioid Crisis
Cannabis as an Effective Pain Reliever: Uwe Blesching’s Evidence-Based Response to the Opioid Crisis

Medical cannabis expert Uwe Blesching Ph.D. breaks down the top 5 evidence-based reasons why cannabis is an effective pain reliever as compared to opioids, and describes how the future of medical marijuana is moving toward a chemotype-based classification system.

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How Cannabis Works for Post-Traumatic Stress Disorder (PTSD)
How Cannabis Works for Post-Traumatic Stress Disorder (PTSD)

Post-Traumatic Stress Disorder (PTSD). Learn the facts: the signs, the research, and how cannabis can help relieve PTSD symptoms and save lives.

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THE ENDOGENOUS CANNABINOID SYSTEM (ECS): What’s All the Fuss About?
THE ENDOGENOUS CANNABINOID SYSTEM (ECS): What’s All the Fuss About?

Discover the science behind the lesser known cannabinoids. Cannabinoids are fundamental components of human health. The term “entourage effect,” describes Dr. Mechoulam’s discovery of the human body’s natural cannabis receptor system—the system cannabinoids like CBD, THC, CBDa, THCa, CBGa act upon.

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Cannabinoids: THC and CBD
Cannabinoids: THC and CBD

Part 1 of ‘Ask Ed’ Rosenthal’s 3 part series on cannabinoids focuses on THC and CBD. Because cannabinoids are behind the desirable impacts of cannabis consumption, they are also the key target of extraction. Learn more.

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