Brian Whipker, PhD., Cannabis Insights: Diagnosing Nutrient Disorders

October 2023

Brian Whipker has been a Professor at NC State University for over 30 years specializing in plant nutrition, plant growth regulators, and disorder diagnostics. He has published >120 scientific papers and >300 grower articles during his career. He co-created an online grower resource fertdirtandsquirt.com which focuses on nutrient monitoring and nutrient standards. He also co-authored the book Nutrient Deficiencies in Bedding Plants: A Pictorial Guide for Identification and Correction. The culmination of his plant growth regulator research is emphasized in the Plant Growth Regulator Guide for Annuals published by Fine America/GrowerTalks. His current focus is to provide scientifically-based grower information about plant leaf tissue analysis standards and plant nutrition.

Learn more by registering for our webinar at the link below.

Previous Webinars

Alisha Holloway, PhD

September 16, 2026, 11:00 AM MT

Enhancing Cannabis Quality through Marker-Assisted Selection for Improved Solventless Extraction Yield

Alisha Holloway is the Chief Scientific Officer at Phylos where she leads the R&D and Breeding groups that focus on discovery and implementation of genetic markers for high value traits, and the development of new cannabis varieties […]

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Ken Mackie, PhD

September 10, 2026 1:00 PM MT

Cannabinoids and weight loss:  A twisted tale

Dr. Ken Mackie is a Distinguished Professor of Psychological and Brain Sciences at Indiana University, Bloomington, IN (IUB) and a Linda and Jack Gill Chair of Neuroscience. He received his MD from Yale University, did his Anesthesiology Residency at the University […]

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Christian Büser, PhD

August 20, 11 AM MT 2026

Is smaller better? Nanofertilizers in Cannabis Cultivation

Christian Büser is a doctoral researcher in Agricultural Sciences at the Institute of Crop Science of the University of Hohenheim in Germany, where he also earned his Master’s degree in Agricultural Sciences with a focus on plant physiology. For the past […]

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Joshua Gowin, PhD

Aug 13, 2026 01:00 PM Mountain Time

Brain Function Outcomes of Recent and Lifetime Cannabis Use

Joshua Gowin, PhD, is an Associate Professor within the Department of Radiology at the University of Colorado Anschutz Medical Campus. As a neuroscientist, his primary research program investigates the neural mechanisms of addiction, specifically focusing on how substance […]

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Andrew Maxwell Phineas Jones, PhD

July 15th @ 11:00AM MT

Ten years of Cannabis micropropagation: What has changed and what are the best uses

 Dr. A.M.P. (Max) Jones is a professor and leading researcher in cannabis biotechnology at the University of Guelph, Canada. For the last decade his research has focused on plant tissue culture and micropropagation systems for cannabis and in […]

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Kent Hutchison

July 9, 2026, 1 PM Moutain Time

Dr. Kent Hutchison is a Professor of Psychiatry at the University of Colorado Anschutz Medical Campus and Director of the Rocky Mountain Center for Cannabis Research. He received his Ph.D. from Oklahoma State University, completed postdoctoral training at Brown University, and has developed NIH-funded programs of research […]

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