These 1.5” Macro plugs are cylindrical, with a slit up the side that allows for the effortless insertion of a cutting or bare-root plant. They’re perfect for for Seed Starting, Plant Propagation, Root Cuttings and Cloning.

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.