Rockwool / Stonewool 4 Inch Gro Blocks – 6 Pack



  • 4″ Gro Blocks can be used as an intermediary or final container for planting.
  • Individually wrapped cubes hold the rockwool’s shape and prevent algae growth.

Wholesale & Commercial Pricing Available Call 905-435-5845 or Email

In Stock


Made in Denmark since 1969, Grodan rockwool (also called stonewool) is widely recognized as the ideal soilless substrate. For any growing application, rockwool offers speed, ease of use, and cleanliness. Rockwool is an alternative to coco coir and expanded clay for hydroponic applications.

Additional information

Weight 1 lbs
Dimensions 24 × 10 × 8 cm