Grodan Rockwool Cubes Sterile Inorganic Growing Medium for Seed Starting & Rooting Cuttings (1.5 Inches) 49 Cubes

Promote healthy root development and efficient propagation with Grodan Rockwool Cubes. Made from spun molten rock, this sterile, inorganic growing medium offers a nutrient-free environment ideal for rooting cuttings and starting seeds. Each 1.5-inch cube provides 20% air space when saturated, balancing moisture retention with optimal oxygen flow for vigorous root growth. Easily prepared by soaking in pH-adjusted water, these cubes ensure uniform size and consistency for seamless transplanting. Perfect for hydroponic systems, greenhouses, and home gardening, this 49-pack of reusable Rockwool cubes supports sustainable, high-quality plant propagation.

About this item

• Premium Inorganic Growing Medium – Made from spun molten rock, Grodan Rockwool cubes provide a sterile, nutrient-free environment perfect for rooting cuttings and promoting healthy plant growth.
• Optimal Air and Water Balance – With 20% air space when saturated, these cubes ensure excellent oxygen flow and moisture retention, creating ideal conditions for strong root development.
• Easy to Condition for Best Results – Simply soak the cubes for 8 hours in water with a pH of 5.0-5.5, then rinse with pH 7.0 water to prepare them for planting and maximize rooting success.
• Consistent Size for Uniform Growth – Each 1.5-inch cube is precisely sized to support consistent seedling growth and easy handling during propagation and transplanting.
• Versatile and Reusable – Perfect for hydroponics, greenhouses, and home gardening, these 49-pack cubes can be rinsed and reused, offering long-term value and sustainable growing.

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