Gro-Block Improved Uni-Block 8 in x8 in x4 in, No hole, case of 36

The Grodan Improved Uni-Block was designed as the ideal stacking block, giving you more choice in your growing configuration. It was developed specifically for larger plants, to increase yields, with a solid base for top-heavy plants. The Uni-Block has excellent water holding capacity and provides a larger substrate volume for extra root growth. 8"x8"x4" block (case/36).