Our People
Regulatory
Calvin Hartzog
Senior Regulatory Specialist - A nationally noted agronomist and plant pathologist, Mr. Hartzog is responsible for managing the registration process for FBS. Mr. Hartzog designed all company field research activities related to existing and new fungicide and growth regulator products for NuFarm International in Houston, Texas. In 2000 Mr. Hartzog joined Stoller Enterprises, Inc., in Houston, Texas, serving as product development manager. Since 2002 and before coming to FBS in 2008, Mr. Hartzog owned a product development and regulatory consulting company – Plant Synergists, Inc., in Houston, Texas.
Mr. Hartzog holds a masters degree from Colorado State University in plant pathology and weed science with a concentration in crop protection. His B.S. degree, which he also earned at Colorado State, is in soil and crop science.

