40 Under 40, Class of 2016

Allison Hope Justice


Biological Defense Systems, Fair Play, South Carolina

Job Title



  • Owns and operates two different businesses — a commercial greenhouse operation as well as Biological Defense Systems that provides a way for growers to rear their own entomopathogenic nematodes in-house.
  • Earned her doctorate in ornamental horticulture from Clemson University.


On Her Nightstand: The Outlander Series by Diana Gabaldon. “It is the perfect mix between mystery, history and romance. It is also based around all of Scotland which is neat because I’ve spent a good deal of time in Scotland.”

Fun Facts

A Family Tree with Deep Horticultural Roots: Almost all of Allison’s family is involved with plants. Her maternal grandparents were cotton farmers and her paternal grandmother was a florist. Her sister and brother-in-law are landscape architects and she grew up on an ornamental tree farm, which led her to the green industry.

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GPN recognizes 40 industry professionals under the age of 40 who are helping to determine the future of the horticulture industry. These individuals are today’s movers and shakers who are already setting the pace for tomorrow.

75 Applewood Drive, Suite A
P.O. Box 128
Sparta, MI 49345

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