Organic Cannabis Cultivation: Living Soil, Microbes & Terpenes with Luna Whitcomb

What is living soil cannabis cultivation, and how do soil microbes, mineral balancing, and growing environments influence cannabis plants? On this episode of the Bioactive Podcast, Dr. Riley Kirk sits down with Luna Whitcomb, an organic cannabis cultivator, consultant, writer, and breeder, to explore the science of living soil, soil food web ecology, plant nutrition, and terpene expression. With more than 18 years of cultivation experience across indoor, outdoor, greenhouse, and large-scale hemp operations, Luna shares how organic cultivation practices can support soil health, nutrient cycling, and the unique expression of cannabis genetics. This conversation explores the differences between hydroponic cultivation and living soil, the concept of terroir, and how soil composition, microbial diversity, mineral availability, and light exposure may influence plant structure and aroma. Luna explains soil mineral balancing, soil testing, reusing and re-amending soil, composting, worm castings, insect frass, and the role of companion planting in nutrient cycling. The discussion also examines the risks associated with improperly composted animal manures, the challenges of managing pests and pathogens, and the limitations of current cannabis lab testing when it comes to measuring the full range of aroma compounds. Dr. Riley Kirk and Luna also discuss cannabis cultivation across different regions, from the differences Luna observed between British Columbia and eastern Canada to her experience judging a Thai landrace cannabis competition. They explore the challenges of growing equatorial genetics outside their native environments, auto-deprivation greenhouses, large outdoor plants, and even the debate around using urine as a fertilizer. Whether you're interested in organic cannabis cultivation, living soil, soil microbiology, terpene science, or sustainable growing practices, this episode offers a deeper look at the ecology behind the plant. Chapters 00:00 Meet Luna Whitcomb 00:35 Origin Story Growing Cannabis 02:41 Living Soil vs Hydro 05:56 Terroir Microbes Minerals 08:51 Getting Started Living Soil 12:30 Soil Testing Reuse 15:00 Can You Taste Living Soil 16:56 Consulting And Microscopy 20:56 Why Living Soil Matters 22:59 Compost Worms Frass 25:05 Manure Pathogen Risks 27:44 Pests Ecosystems Canada 29:45 Canada Flower Quality 31:03 BC Terroir Talk 31:52 Thailand Landrace Judging 32:11 What Landrace Means 33:59 Got Sick From Smoking 35:15 Solo Trip Into Mountains 37:37 Lanterns And Bamboo Bong 39:30 Growing Equatorial Genetics 41:35 Auto Dep Greenhouse 42:21 Monster Outdoor Plants 44:50 Companion Planting Science 46:36 Pee As Fertilizer Debate 48:26 Where To Find Luna 49:01 Seed Laws And Landrace Sales 50:26 Final Wrap Up Connect with Luna Whitcomb Instagram: https://www.instagram.com/lunallday/ Website and seed inventory: https://moongrownbotanicals.com/ Support the Bioactive Podcast Support the show on Patreon for more cannabis science and educational content: https://www.patreon.com/Cannabichem Sign up for updates and educational resources from Applied Pharmacognosy: https://www.appliedpharmacognosy.org/ Keep Up with Dr. Riley Kirk https://www.bioactivepodcast.com/ https://www.youtube.com/@cannabichem https://www.instagram.com/cannabichem/ https://www.appliedpharmacognosy.org/ If you enjoy conversations about cannabis science, organic cultivation, soil microbiology, terpenes, and plant chemistry, subscribe to the Bioactive Podcast, leave a comment with your biggest takeaway, and share this episode with someone interested in the science of growing cannabis. Learn more about your ad choices. Visit megaphone.fm/adchoices