56 Pieces Rock Wool Sponge Cubes for Hydroponic Planting Hydroponic Planting Cubes 4 x 4 x 4 cm Suitable for Soil Sowing in Greenhouses

Rock wool is made from a material, first spun into fibers, then compressed at extremely high temperatures to form soft blocks. This inorganic inert matrix is non-toxic, harmless, environmentally friendly and easily recyclable. Naturally environmentally friendly, rock wool is characterized by a light texture, low bulk density and high porosity. It has high absorption of nutrient solutions, excellent aeration, superior water retention and sufficient oxygen supply. Package includes two trays and two pairs of gloves. Each tray contains 28 small blocks of rock wool for plants, which is 56 blocks in total. Each small pad measures 4 x 4 x 4 cm, making them ideal for both amateur and commercial applications. Planting blocks have countless microscopic pores inside, allowing them to absorb and store significant amounts of water and nutrient solutions. Simultaneously, these pores ensure adequate air circulation, effectively preventing suffocation of the roots and promoting dense growth of the roots. Rock wool seedling blocks fit different sizes of pots, only requiring filling of empty spaces. Suitable for both large-scale seedlings and indoor planting, just place seedlings in blocks and add enough water.