In the 1960s, plants began growing naturally on discarded pieces of Grodan stone wool. Researchers discovered that the material’s unique structure created an ideal balance of water and oxygen around plant roots, helping crops grow more consistently and predictably.

That discovery led to the creation of Grodan in 1969 and the introduction of stone wool growing media for horticulture.

For more than 50 years, Grodan has helped cannabis growers produce healthier, more uniform crops using precision-engineered stone wool, backed by industry-leading crop research and expert support.

Whether you're exploring stone wool for the first time or optimizing a commercial facility, Grodan's team is ready to help.

Why Growers Choose Grodan

A complete growing system built for your success.

Grodan combines products, technology, expertise, and education to help growers make better decisions throughout the crop cycle.

Research & Innovation

Insights that help growers stay ahead

Around the world, Grodan invests in cannabis research to help growers make informed decisions with less guesswork. Through scientific trials, industry partnerships, and real-world cultivation data, we study how genetics, climate, and growing strategies influence crop performance.

We turn these findings into practical guidance to help you refine irrigation and crop steering strategies, improve efficiency, and achieve more consistent results.

Sustainability & Stewardship

Investing in a More Sustainable Future

Grodan stone wool begins with naturally occurring basalt rock, one of the most abundant volcanic materials on Earth. This rock is then engineered into a growing medium designed to maintain a consistent balance of water and oxygen in the root-zone, supporting precise irrigation and efficient resource use. Beyond cultivation, stone wool also offers opportunities for recycling and reuse, giving the material a second life after harvest.

Meet the Experts

Decades of crop knowledge. Real-world growing experience.

Every growing operation comes with its own challenges. Grodan's team combines crop science, data analysis, and hands-on cultivation experience to help growers make informed decisions throughout the crop cycle.

Whether you're selecting products, optimizing irrigation strategies, interpreting sensor data, or troubleshooting crop issues, our specialists are here to help.

Let's Talk About Your Operation

From finding the right products to requesting a trial, our team is here when you need us.