About Ultimate Agri Products

Proudly Australian. Built on the Land. Trusted for Over 25 Years.

At Ultimate Products (Aust) Pty Ltd we’ve always believed that good land deserves great care. We started back in June 1997 with just three products and one clear goal, to help Australian growers get better results from their soil and crops.

Our story really begins in the fields. Glen McDonald, our co-founder and Managing Director, spent years as a vegetable grower – since 1983, in fact. Always curious and open to better ways of doing things, Glen set out to replace the bulk gypsum and lime products that just weren’t cutting it. By 1999, that curiosity paid off with the launch of GYP-FLO and pH PLUS – two products still trusted by farmers today.

Fast forward over 25 years, and our product range has grown to over 10 carefully developed solutions — all designed to solve real challenges in the field. We now work with a wide range of industries, including:

  • Agriculture & Horticulture

  • Civil Construction & Infrastructure

  • Re-Vegetation & Land Rehabilitation

Whether you’re looking to loosen compacted soil, correct pH, improve crop health or manage water quality — our focus is the same: real results that help you grow smarter and stronger.

Soil Solutions

Water Solutions

Crop Solutions

Our Mission

To deliver innovative and sustainable solutions that support healthier soil, stronger crops, and better land outcomes across Australia.

Our Vision

To be the go-to provider for land and water management products that empower growers, builders, and communities.

Let's Work Together

Reach out to discover the right products and support for your agricultural needs.