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Details: Grodan’s Gro-Blocks are used in grow rooms and greenhouses worldwide. Trusted by hydroponic growers for over a decade, Grodan Gro-Blocks allow professional cultivators to grow more top quality produce with fewer inputs. The homogeneity of Grodan Gro-Blocks provides growers with a solid, consistent base for optimizing crop production. Cultivators can easily achieve a great balance of oxygen to nutrients and drive rapid plant growth. Grodan Gro-Blocks are clean, lightweight, and easy-to-use. Professional growers love Grodan Gro-Blocks because they allow efficient use of water and nutrients throughout the growth cycle. Effortless start-up of propagation. Grodan Gro-Blocks are perfect for propagating young plants under a wide range of propagating conditions. The Grodan Gro-Blocks are easy to saturate and water is distributed uniformly throughout the block, for reliable root development and plant growth Excellent root growth throughout the block. The Grodan stone wool ensures uniform distribution of water and nutrients throughout the block, encouraging the roots to penetrate deeply into the block. Greater firmness for better handling. During the propagation stage, blocks generally will be manually or mechanically handled several times. Due to the greater firmness of the Grodan Gro-Blocks, this handling is no problem and the Grodan Gro-Block will maintain its shape and structure. The stable firmness of the blocks becomes particularly important when the blocks are placed, spaced and picked up several times during propagation.