Made in Denmark since 1969, Grodan stonewool Starter Plugs have excellent capacity for absorbing nutrient solutions while retaining plenty of oxygen for rapid plant growth.
Pro-tip: These fit perfectly in the Grodan Gro-Smart tray. The big advantage of using the Gro-Smart tray is that it elevates the plugs above the waterline and ensures good airflow and drainage.
Stonewool Macroplugs are a sure bet for optimum germination. They start as basalt rock and chalk that is melted, spun into cotton candy-like fibers, and finally compressed into plugs. Their fibrous structure creates an ideal air-to-water ratio which contributes to robust root development throughout the entire plug. Includes 50 plugs.