RELAX 50PCS Rockwool Stonewool Grow Cubes Starter Sheets for Cuttings Cloning Plant Propagation Seed Starting Hydroponic Grow Media Growing Medium for Vigorous Plant Growth

Specification: Material: rock wool Material: 4*4*4mm 20mm in diameter and 27mm in height (Due to manual measurement there will be an error of 1-3mm.) Description: Preparation and planting of rock wool blocks. Soak in water for 2 minutes. Take it out of the water and let it sit for about 15 minutes. Put the seeds in the holes of the cube. Spray water after the seeds are inserted. Put it in the seed tray. Package Including: 24pcs 40*40*40mm Rockwool Cubes or 50pcs 20mm*27mm Rockwool Cubes (Buy whichever you need)