In this episode of Founders in Full, I talk with Joe Weber, founder of Four Star Mushrooms, a Chicago-based mushroom company on a mission to transform our food system through regenerative agriculture, chef-driven partnerships, and urban farming innovation.

Joe’s journey began with a deep interest in ecology and sustainable agriculture. But after a lightbulb moment listening to a Paul Stamets podcast, he realized mushrooms could be the keystone species that brought his vision to life. With no prior experience growing mushrooms, he launched Four Star in 2019—and has been building ever since.

We dive into:

✔️ How a mission-driven vision became a high-growth urban farm in Chicago
✔️ What it really takes to build B2B relationships with top chefs and restaurants
✔️ How the brand grew organically through word-of-mouth and chef credibility
✔️ Why retail is the next big frontier—and how they’re educating consumers along the way
✔️ The power of staying adaptable, making fast decisions, and solving problems that customers never see

If you're building a values-driven business—or thinking about how to scale something rooted in both purpose and product quality—this episode is for you.

About Four Star Mushrooms:
Four Star Mushrooms is a modern mushroom farm growing premium, specialty mushrooms in the heart of Chicago. With a commitment to regenerative practices, local food systems, and strong chef relationships, Four Star is changing the way people think about mushrooms—one dish at a time.

👉 Learn more about Four Star Mushrooms: https://www.fourstarmushrooms.com

👉 Connect with Joe on LinkedIn: https://www.linkedin.com/in/weberjoe1/

About Dan and Third Act Marketing:

I'm Dan Ritzke, founder of Third Act Marketing. I work with founders and growing businesses to help them get clear on their brand, build smart marketing strategies, and turn big ideas into real momentum.

If the conversations on Founders in Full got you thinking about your own marketing — your story, your positioning, your growth strategy — let’s connect.

👉 Learn more at: https://www.thirdactmarketing.com

👉 Connect with me on LinkedIn: https://www.linkedin.com/in/ritzke

Want to be on the podcast — or know a Founder with a story to tell and insights to share?

Founders in Full features real, honest conversations with founders about the highs, lows, and lessons of building a business. If you’d be a great guest (or know someone with a story worth sharing), I’d love to hear from you.

👉 Nominate a guest or apply to be on the show at https://www.thirdactmarketing.com/podcast