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landscapearchitect.com just celebrated the 100 birthday of Dr. John Ansel Armstrong Thomson, the developer of horticultural vitamins-hormones solution SUPERthriv. www.landscapearchitect.com/research/article.php/15839. We’re sad to report we now have to publish his in memoriam.
Dr. Thomson passed away peacefully Nov. 28 just five days after his 100th birthday.
Preceded in death by his lovely wife June Anna Mae Hummel Thomson, Dr. Thomson is survived by three children, Sheryll, Patrisha, and Robert Thomson, all located in the Los Angeles area; three grandchildren, Travis and Ben Thomson, and Leah Flanagan; and four great-grandchildren, Elijah and Alannah June Thomson and William and Margaret June Flanagan.
Thomson developed the SUPERthrive formula in 1939. Seventy-two years later, he was still engaged in the daily operations of his company, Vitamin Institute, actively selling worldwide. As the new president, his daughter Patrisha Thomson will continue her father’s legacy of improving horticultural and agricultural crops with the firm’s sole product.
Holding a PhD in biochemistry, Dr. Thomson collected awards and commendation for his lifetime of work. In 1940, he earned the Science & Industry’s only Gold Medal at the San Francisco World’s Fair Golden Gate International Exposition. In 2006, Dr. Thomson became the first chemist to be honored with a Lifetime Achievement Award from the Lawn & Garden Marketing & Distribution Association. Other honors include Lifetime Environmental Awareness Award from Sustainable Environmental Education and induction into the “Nursery Retailer” magazine’s Hall of Fame.
Dr. Thomson attributed his longevity to his family upbringing, a fortunate environment and a mental ability that hit the ceiling on the Standard I.Q. test.
Thomson’s grandfather and great-grandfather were owners of the biggest hotel in Detroit, and both of his parents were successful professionals and top money-raisers for the American Red Cross during World War I. His mother, Florence Antisdel Thomson, raised enough funds to build a Red Cross base hospital in France.
His parents promoted individuality and personal health, fueling John’s life-long interest in nutrition, leading to his life’s work in nutrition for both people and plants.
Throughout World War II, SUPERthrive was used by five U.S. Government departments (Army Corps of Engineers, Air Force, Navy, Department of Agriculture and the Forest Service) to transplant mature trees for defense plant camouflage; plant and sustain low-dust turf landing fields; improve soil conditions where salt interfered with plant success; develop vital drug and oil-bearing plants domestically; and increase production of necessary guayule rubber.
Dr. Thomson is listed in 39 different Who’s Who Directories and has served in many community positions: as officer and delegate with Boy Scouts of America, and as president of both Kiwanis of North Hollywood and the China Society in Los Angeles. Founding members of the latter included Dr. Thomson’s wife and her parents, Dr. William and Mildred Hummel.
A longtime member of the First United Methodist Church of North Hollywood, Dr. Thomson served on the church administrative board and as chairman of the Commission on Church & Society. He was an honorary lifetime member of United Methodist Men and has served as its president, and as program leader and lecturer.
Dr. Thomson was fortunate in his last months to have a wonderful staff of medical personnel and companions to watch over and encourage him, for which the family expresses deep gratitude. He will be greatly missed by all who knew him.
When asked about his primary philosophy of life, Dr. Thomson summed it up saying, “My whole idea is to try to leave the world better off for wherever I touch it.”
Francisco Uviña, University of New Mexico
Hardscape Oasis in Litchfield Park
Ash Nochian, Ph.D. Landscape Architect
November 12th, 2025
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