Grodan Improved Gro-Block3in - Small - GR4 - 3in x 3in x 2.6in - Pre-Cut Holes - Shrink-wrap/StripGrodan's Improved Gro-Blocks utilize improved hydrophilic technology and density for better water distribution and root development. Shrink Wrapped. Non-Shrink Wrapped version can be ordered with item# GRD287055.
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