Stone wool Macro plugs 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. If you’re ready to experience phenomenal growth with premium rockwool – the Grodan Macro Plugs are your gateway to better growing.
- These Rockwool plant starting plugs feature a slit for easy insertion of rooted cuttings
- Ideal for growers using aeroponic EZ clone machines
- They fit perfectly into the holes of any standard Rockwool blocks
- Inserted into pebbles, or any other type of growing mediums
- Fit perfectly inside the Grodan Gro-Smart Insert trays for added support