Grodan AO Flats

Grodan AO (A-OK) starter plugs are high-quality, stonewool (rockwool) growing media designed for seed germination and cutting propagation. These plugs are generally sold in sheets that fit into standard 10x20 hydroponic flats, making them ideal for managing large numbers of seedlings or clones.

• Optimal Air/Water Balance: The fibrous structure maintains a high capacity for nutrient absorption while ensuring sufficient oxygen for rapid root development.
• Uniform Growth: Pre-drilled holes ensure seeds stay in the centre, promoting uniform germination and preventing tangle roots between plugs.
• Tapered Design: AO plugs are tapered (v-shape) at the bottom, making them easy to separate or transplant into larger growing blocks.
• Convenient Packaging: Often sold in sheets of 98 (1.5" size) that fit standard 10x20 inch propagation trays