Grodan Gro-Block Jumbo 6 x 6 x 4 with Hole is a rockwool block designed to accept starter plugs or smaller transplants and carry plants forward into active production. The pre-formed hole makes transplanting quick and consistent, while the engineered rockwool structure helps roots spread evenly through the block. It is ideal for hydroponic growers who want dependable watering behavior and a tidy, professional media system.
