Package contents: - 2 sheets, each with 28 cubes (total 56 cubes) How to prepare and use: - Soak each Rockwool cube briefly in acidic nutrient solution for 10 seconds. - Adjust the solution pH to 5.5. - Do not press the cube during preparation. Material and performance: - Made from inorganic basalt rock wool fibers, compressed into blocks by proprietary processes. - Soft texture with excellent water absorption and strong air permeability. - Ideal substrate material for soilless cultivation and hydroponics. Design and drainage: - Slotted mesh pots for hydroponics with bottom holes promote even drainage. - Roots can grow through the mesh cup and emerge from the side, forming larger and healthier root systems. Transplantation and handling: - Suitable for cultivation as a whole block or as individual cubes. - Rockwool is transverse-textured; wear gloves and cut with scissors rather than tearing by hand. - High water absorption supports root development, contributing to a higher transplant survival rate. Use scenarios: - Seed starting for leafy greens and herbs in hydroponic or soilless systems. - Propagation of cuttings to establish a robust root system before transplant. - Transplant into larger hydroponic net pots or aeroponic systems in greenhouse or indoor farming setups.