Dr. Russell Sharp closes out Hydroponics Daily’s 2025 run with a compact guide to the most toxic plants. He explains why “natural” or “plant‑derived” doesn’t mean safe and shares examples of species that can cause severe harm.
The episode lists the top poisonous plants to watch for, such as hemlock, giant hogweed, deadly nightshade, Brugmansia, monk’s hood, yew, oleander, castor bean, water hemlock and foxglove, plus practical safety warnings for growers and gardeners.
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Dr. Russell Sharp closes out Hydroponics Daily’s 2025 run with a compact guide to the most toxic plants. He explains why “natural” or “plant‑derived” doesn’t mean safe and shares examples of species that can cause severe harm.
The episode lists the top poisonous plants to watch for, such as hemlock, giant hogweed, deadly nightshade, Brugmansia, monk’s hood, yew, oleander, castor bean, water hemlock and foxglove, plus practical safety warnings for growers and gardeners.
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Tony Knight — Colorado State University
Richard Walter — Colorado State University
James Pfister — USDA-ARS Poisonous Plant Research Laboratory
Bryan Stegelmeier — USDA-ARS Poisonous Plant Research Laboratory
Michael Ralphs — USDA-ARS Poisonous Plant Research Laboratory
Dale Gardner — USDA-ARS Poisonous Plant Research Laboratory
Kip Panter — USDA-ARS Poisonous Plant Research Laboratory
Benedict Green — USDA-ARS Poisonous Plant Research Laboratory
Kermit Price — USDA-ARS Poisonous Plant Research Laboratory
Clinton Stonecipher — USDA-ARS Poisonous Plant Research Laboratory
Kevin D. Welch — USDA-ARS Poisonous Plant Research Laboratory
Daniel Cook — USDA-ARS Poisonous Plant Research Laboratory
Scott Larsen — USDA-ARS Poisonous Plant Research Laboratory
Jennifer Colvin — USDA-ARS Poisonous Plant Research Laboratory
Tracy McCluskey — USDA-ARS Poisonous Plant Research Laboratory
Lynn James — USDA-ARS
Stephen B. Lee — USDA-ARS
Derek Bailey — USDA-ARS
Michael H. Smith — USDA-ARS
Daniel R. Gardner — USDA-ARS
Elizabeth A. Dauncey — Royal Botanic Gardens, Kew
Nicola Bates — Veterinary Poisons Information Service
Sally Bradberry — National Poisons Information Service
Simon Thomas — National Poisons Information Service
Allister Vale — National Poisons Information Service
Michael J. Balick — New York Botanical Garden
Lewis S. Nelson — Rutgers New Jersey Medical School
Richard D. Shih — Weill Cornell Medicine
Noah Whiteman — University of California, Berkeley
Sonny Larsson — Uppsala University
Sarah Lister — ASPCA Animal Poison Control Center
Ahna Brutlag — Pet Poison Helpline
Justine Lee — Pet Poison Helpline
Tina Wismer — ASPCA Animal Poison Control Center
Steven Hansen — Pet Poison Helpline
Timothy J. Evans — University of Illinois
Rebecca H. McClanahan — University of California, Davis
Philippa A. Smith — Royal Botanic Gardens, Kew
Eimear M. Nic Lughadha — Royal Botanic Gardens, Kew
William Milliken — Royal Botanic Gardens, Kew
Edward P. Krenzelok — Pittsburgh Poison Center
Robert S. Hoffman — NYU Grossman School of Medicine
William Banner — Oklahoma Center for Poison & Drug Information
Paul M. Wax — UT Southwestern Medical Center
Henry A. Spiller — Kentucky Poison Control Center
Mary Ann McGregor — Texas Poison Center Network
Kurt A. Kleinschmidt — Texas Poison Center Network
Donna L. Seger — Tennessee Poison Center
Christine Murphy — National Capital Poison Center
Gwen Wurm — Oregon Poison Center
David Trinklein — University of Missouri Extension
Karen Funkenbusch — University of Missouri Extension
Ralph Whitesides — Utah State University Extension
Corey Ransom — Utah State University
Bret A. Scasta — University of Wyoming
Keith Johnson — Purdue University Extension
Debra Hagstrom — University of Illinois Extension
Tom Dudek — University of Arizona Cooperative Extension
Maryline Seigler — University of Florida
Stephen L. Welsh — Brigham Young University
Craig A. Schmutz — University of Saskatchewan
David W. Hulbert — University of Queensland
Caroline Veresoglou — Freie Universität Berlin
Daniel J. Kliebenstein — University of California, Davis
Mark A. D. Goodwin — University of Georgia
James A. Duke — USDA
Julia F. Morton — University of Miami
Lawrence Kaplan — University of Massachusetts Boston
Peter A. Cock — Australia (Plant Toxins Research)
Robyn M. Gleadow — Monash University
Ian E. Cock — RMIT University
Philippa M. Forrester — University of Sydney
Mary T. Fletcher — The University of Queensland
Robert J. Petroski — University of Queensland
John M. Coleman — CSIRO
Ralph D. Tanner — CSIRO
Andrew W. Poulsen — CSIRO
John A. Sutherland — University of Adelaide
Peter J. McGee — University of New England
Bryan G. Fry — The University of Queensland
Alan L. Hart — University of Oxford
Mark W. Gurnell — University of Cambridge
David J. Watson — University of Tasmania
Ian D. Rae — Monash University
John M. Jacobsen — Montana State University
Wendy C. Weedon — University of Florida
Karin L. Wieringa — Wageningen University & Research
Rohan A. Davis — The University of Queensland
Vicki A. L. Mellick — University of New South Wales
Paul G. Jones — University of Reading
Nigel J. C. Veitch — Royal Botanic Gardens, Kew
Monica F. M. Gruber — University of Bristol
Anne Osbourn — John Innes Centre
Michael Heinrich — UCL School of Pharmacy
Christine A. Smart — Cornell University
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