About this episode

Jack Higgins interviews Kirk Castner about the evolution and growth of EarthWorks over the past decade.

Jack Higgins sits down with EarthWorks’ Kirk Castner for a behind-the-scenes look at how the company has evolved over the past decade and where it's headed next. Rather than focusing on agronomy alone, this episode explores the people, manufacturing, logistics, and philosophy that allow EarthWorks to continue meeting growing demand while maintaining product quality. Jack and Kirk reflect on their years with EarthWorks and discuss the tremendous growth the company has experienced, expanding from a single granulation facility to multiple production plants across the United States. They explain how increasing demand from golf courses has expanded into sports turf, parks, universities, hydroseeding, construction, and tree care, requiring significant investments in new manufacturing capacity. The conversation dives into the unique partnership with Rose Acre Farms and how EarthWorks turns poultry manure into premium compost-based fertilizers through a true circular economy. Kirk explains the lengthy composting process, new composting technologies, odor reduction efforts, expanded compost storage, and additional granulation facilities currently under construction. They also discuss the…

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