Organic Cannabis Cultivation: Living Soil, Microbes & Terpenes with Luna Whitcomb
52 min
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 Whitco...