Soilless potting mix - Grodan A OK Rockwool Cubes Sheet of 98, 1.5" | Seed Starting Plugs for Hydroponics

Starting your valuable seeds in a sterile, highly controlled environment ensures the absolute highest possible success rate for your garden. These Grodan A OK rockwool cubes act as an advanced soilless potting mix, giving your young plants a massive developmental advantage right from day one. You can confidently build a robust early root system without the unpredictability and mess of standard organic dirt.

Expertly spun from molten basalt rock into fine fibrous plugs, these cubes provide an absolutely ideal ratio of air capacity and moisture retention for rapid germination. When you use this media as a dedicated seed starting mix, the inert fibers offer zero resistance to fragile taproots as they expand. Because they are completely sterile, you have total control over the feeding schedule when you begin applying your preferred hydroponic nutrient solution. They will never degrade, break apart, or cloud your delicate reservoir systems like loose soil amendments tend to do.

Place your seeds or unrooted cuttings into the pre-drilled holes and position the entire sheet inside a plastic humidity dome until the roots push through the bottom. They easily and safely transition from propagation trays directly into larger rockwool blocks or a standard indoor potting soil setup without ever disturbing microscopic root hairs. The sheet of 98 uniform blocks offers commercial-scale consistency for serious growers who demand flawless, uniform crop propagation.

Store in a cool, dry place away from direct sunlight and moisture. Reseal packaging tightly after use to maintain product quality and effectiveness.