Our Story

From Volcanic Rock to Precision Growing

In the 1960s, plants began growing naturally on discarded pieces of 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

Research the helps growers stay ahead

Around the world, Grodan invests in cannabis research so growers can make better decisions with less guesswork. Through in-house expertise, scientific trials, industry partnerships, and real-world cultivation data, Grodan studies what impacts crop performance across different genetics, facilities, climates, growing strategies, and production goals.

From propagation and crop steering to pest pressure, labor efficiency, input use, yield, quality, and scalability, Grodan translates research into practical guidance growers can apply in their own operation. 

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.

The ROCKWOOL Group

Built on More Than a Century of Stone Wool Expertise

Grodan is part of the ROCKWOOL Group, a global leader in stone wool solutions founded in 1909.

What began as a building material company evolved into a family of businesses serving industries ranging from construction and acoustics to horticulture. Today, Grodan combines more than 50 years of horticultural expertise with the resources, innovation, and manufacturing capabilities of one of the world's leading stone wool companies.

This connection allows Grodan to continuously invest in product development, crop research, manufacturing excellence, and grower support.

Let's Talk About Your Operation

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