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About TCO Agromart

TCO Agromart is a leading provider of crop inputs and services in Central Eastern Ontario. Over the years, we have grown through numerous structural changes. Our commitment to provide quality products and exceptional customer service to the agricultural community has remained constant.

Wheat fields with blue sky in the background
TCO Agromart Ltd. Grain photo

Our Core Purpose

“We care for our customers, like they are part of our family”

We live this every day through our valued customer and community relationships, our alliance with our corporate partner, Sollio Agriculture (The Agromart Group) and our many suppliers who we partner with.

We could not do this without our amazing team of employees. Many have been working for the company for over 25 years and have a wealth of knowledge and experience to help our customers be successful.

We could not do this without our amazing team of employees. Many have been working for the company for over 25 years and have a wealth of knowledge and experience to help our customers be successful.


We could not do this without our amazing team of employees. Many have been working for the company for over 25 years and have a wealth of knowledge and experience to help our customers be successful.

Our Values

🌾 Honesty & Integrity

We work with each other, our customers and suppliers with honesty and integrity.

🌾 Teamwork

We build loyalty through teamwork, commitment and respect.

🌾 Pride & Professionalism

We take pride in striving to be professional in everything we do.

🌾 Knowledge & Experience

We are committed to using applied knowledge and experience to create value for our customers and grow our business.

🌾 Innovation

We anticipate change with applied innovation.

History of TCO Agromart


  • In 1979 Don Thrasher (owner of Tri-County Agromart) formed a joint venture with The Agromart Group (previously known as CIL).
  • The fertilizer plant was built in the fall of 1979 and the first fertilizer was shipped in the Spring of 1980 out of Trenton at its’ current location. Thrasher’s Agromart was the first Agromart in the area.


  • In 1983, Don sold his shares to John Fleming who was an employee at that time and to Rosemary Davis who was an employee at Agrico in Cobourg.


  • In 1985, Rosemary became the sole owner and the name changed to Tri-County Agromart.
  • Rosemary worked hard to grow the business. Larry Hutchinson, a key employee of Tri-County Agromart worked very closely with Rosemary over the years and with her leadership and mentoring Larry worked in every aspect of the business.
  • He started at the Agromart in 1985 and is currently the General Manager of TCO Agromart.


  • In 2006, Rosemary expressed an interest in retiring and selling her shares of Tri-County Agromart.
  • Larry who managed the operations in Trenton along with Terry and Sandra O’Neill of O’Neill’s Farm Supply in Napanee formed a partnership and became the new owners of Tri-County Agromart with their Corporate Partner, The Agromart Group (previously known as the Agronomy Company of Canada) on June 1st, 2007.


  • Terry and Sandra O’Neill started O’Neill’s Farm Supply in Napanee in 1994 after purchasing the business from Top Notch Feeds.
  • They were the sole owners of the company from 1994 to 2007.
  • In 1994, that business primarily focused on feed and some crop input business.
  • Terry developed a close business relationship with Rosemary Davis from Tri-County Agromart over the years who also mentored him and helped O’Neill’s Farm Supply grow their crop input business.
  • O’Neill’s purchased all their fertilizer from Tri-County Agromart and worked very closely with Rosemary and Larry to ensure that the Napanee area customers would receive fertilizer in a timely fashion.
  • With a focus on growth and sustainability, O’Neill’s purchased Bradshaw Feeds in 1999 and operated out of 3 locations including a Feed Mill.
  • The equipment fleet grew in those years as the various business segments grew.


  • When Tri-County Agromart and O’Neill’s Farm Supply combined in 2007, we needed to form alignment and develop synergies across the company.


  • In 2011, we developed a strategic plan and underwent a name change to better represent the vision of the overall business and geographies.
  • The name TCO Agromart was chosen as the new name which used the initials of Tri-County and O’Neill’s and was an excellent acronym for how we live our core values at this company “a Trusted, Caring, Organization”.

2018 – 2021

  • In 2018, TCO Agromart purchased land on Telephone Road in Colborne to plan a green site for the Trenton Location to move to.
  • A chemical warehouse was completed in the fall of 2021.

March 1, 2021

  • TCO Agromart and Northumberland Grain merged to form one company.
  • This exciting venture brought new partners into the business
  • Presently, the partners of TCO Agromart are:
      • Karen and Dexter Harder
      • Larry Hutchinson
      • Patrick O’Neill
      • Sandra and Terry O’Neill
      • Sollio Agriculture (The Agromart Group) – Corporate retail partner

History of Northumberland Grain

  • Founded exclusively as a Grain Elevator by Robert Elliott. Called Northumberland Grain & Feed in 1980.
  • In 1984, Dexter & Karen Harder became a shareholder of Northumberland Grain & Feed.
  • Three-way partnership was formed between Agrico (Robert L. Whitelaw), Dexter & Karen Harder and Ben Currelly in 1996.
  • Crop inputs were added to the business in 1997, transforming Northumberland Grain into a diversified Agri-retailer, and name officially changed to Northumberland Grain.
  • In 2002 Northumberland Grain purchased Agrico’s Farm Centre on Division Street in Cobourg to expand the business.
  • 50/50 joint Venture between The Harder’s and Agrico was formed for the company in 2005.
  • Purchased Hunco Farm Supply, Cobourg, On in 2007.
  • Consolidated its Cobourg operations from the old Division Steet location to the newer and more efficient former Hunco facility in 2008.
  • To further expand, purchased Agrico’s Belleville Farm Center in 2009.
  • TCO Agromart Ltd. Belleville location
  • TCO Agromart Ltd. Brighton location
  • TCO Agromart Ltd. Cobourg location
  • TCO Agromart Ltd. Inside Colborne Facility
  • TCO Agromart Ltd. Selby location
  • Agromart-Agromart-Ltd. Trenton location
  • TCo Brighton Grain elevator

Present Day Operations

TCO Agromart now operates out of 5 sites. Napanee (Selby location), Belleville, Trenton, Brighton, and Colborne (new site).  As the new site project draws to completion, all operations out of Trenton will move there.

TCO Agromart is now poised to be a leading Canadian supplier of Crop-Inputs, Feed and Supplies to farmers in East-Central Ontario covering the counties of Leeds, Frontenac, Lennox & Addington, Hastings, Prince-Edward, Northumberland, Durham, and Peterborough. We look forward to continuing to grow and advance our business to meet our customers’ needs.