# Episode 165: Boosting Yields 50% with a 13-Hour Photoperiod? Debunking Cannabis Science with Dr. Youbin Zheng

Page: https://stenobird.com/podcast/cannabis-cultivation-and-science-podcast-224812/episode-165-boosting-yields-50-with-a-13-hour-photoperiod-debunking-cannabis-science-with-dr-youbin-zheng
Text version: https://stenobird.com/podcast/cannabis-cultivation-and-science-podcast-224812/episode-165-boosting-yields-50-with-a-13-hour-photoperiod-debunking-cannabis-science-with-dr-youbin-zheng.md
Podcast: [Cannabis Cultivation and Science Podcast](https://stenobird.com/podcast/cannabis-cultivation-and-science-podcast-224812)
Published: 2026-05-19T16:00:46+00:00
Episode link: https://www.kisorganics.com/pages/podcast
Audio file: https://afp-901980-injected.calisto.simplecastaudio.com/eb565bbc-b99d-4ea2-a59e-7c4a2ca16b15/episodes/54b04e9f-24d6-4262-b342-16640dba5efa/audio/128/default.mp3?aid=rss_feed&awCollectionId=eb565bbc-b99d-4ea2-a59e-7c4a2ca16b15&awEpisodeId=54b04e9f-24d6-4262-b342-16640dba5efa&feed=WsEnHj2A
Processing state: not_requested
JSON: https://stenobird.com/v1/public/podcasts/cannabis-cultivation-and-science-podcast-224812/episodes/episode-165-boosting-yields-50-with-a-13-hour-photoperiod-debunking-cannabis-science-with-dr-youbin-zheng
Duration seconds: 4004

## Resource

Can a simple 1-hour change to your lighting schedule increase your flower yields by 50% and your THC by 9%? On this week’s episode of the Cannabis Cultivation and Science Podcast, host Tad Hussey sits down with leading horticulture professor Dr. Youbin Zheng from the University of Guelph in Ontario, Canada. Dr. Zheng is a principal investigator at the absolute forefront of high-THC cannabis agronomy and the author of the definitive textbook, Handbook of Cannabis Production in Controlled Environments. Drawing directly from peer-reviewed data conducted inside commercial licensed facilities, Tad and Dr. Zheng smash some of the industry’s most deeply rooted legacy myths. They dive into why heavy phosphorus feeding is reducing your profits, the surprising truth about how modern high-THC genetics react to supplemental UV light, and the exact science behind using controlled deficit irrigation to trigger a late-flower cannabinoid spike. Whether you are managing a large-scale commercial facility or navigating a boutique organic living soil bed, Dr. Zheng’s pragmatic, data-first approach offers actionable insights to dramatically optimize your canopy’s ROI.

## Actions

- request_transcript: `POST https://stenobird.com/v1/public/podcasts/cannabis-cultivation-and-science-podcast-224812/episodes/episode-165-boosting-yields-50-with-a-13-hour-photoperiod-debunking-cannabis-science-with-dr-youbin-zheng/transcription-requests` — Idempotently request low-priority transcript generation for this episode.
- read_markdown: `GET https://stenobird.com/podcast/cannabis-cultivation-and-science-podcast-224812/episode-165-boosting-yields-50-with-a-13-hour-photoperiod-debunking-cannabis-science-with-dr-youbin-zheng.md` — Read the agent-friendly Markdown representation of this episode resource.

A page view does not enqueue transcription. Agents should invoke `request_transcript` explicitly when they need this episode processed.

## Transcript

Full transcripts are not published on public pages unless there is a clear rights basis.