Thornton Laboratories, Inc.
Fertilizer Laboratory
Over 80 years of accurate referee analytical testing experience!
Thornton Labs Customer Commitment
- Quality & Accurate reports by experienced staff
- FAST turn around service of test results
- Reports e-mailed for faster service
- Competitive priced test procedures
Why choose Thornton Laboratories?
Founded in 1922 by Robert Thornton, chemist, Thornton Laboratories are independent analytical laboratories located in Tampa, Florida, one of the leading fertilizer exporters in the world. Because of our location, our chemists

Left: Charles Thornton, Chemist, 1972
have a vastexperience in testing inorganic and organic fertilizers. Our chemists test the ingredients at every step of the way: from prospecting, mining, procuring, shipping, formulating to blending and packaging. We qualify as specialists in testing all products from simple components to complex formulations. In our 15,000 sq.ft. testing facility we riffle, grind, prep, digest and analyze inorganic and organic fertilizer products from all over the world.
Our dedicated employees have over 290 combined years of analytical experience at our laboratories.
For Further Information Contact our Fertilizer Customer Representatives at (813) 223-9702
General Info:
info@thorntonlab.com
fax: (813) 223-9332
