Rockwool / Stonewool Slab 8″ x 36″ x 3″

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.

• The 6″ x 36″ x 8″ Slab is best fit for use in hydroponic drip systems.
• Individually wrapped cubes hold the rockwool’s shape and prevent algae growth.
• Grodan Rockwool Slabs are excellent for commercial or hobbyist cultivation of leafy greens, smaller vegetable crops, and other high-value plants.