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Grodan Delta 8, 4" x 4" x 3", with hole. Per Strip

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Gro-block are similar to a plant container. Need a 3 in pot? Then choose a 3 in gro-block. Small plants can be fully grown in our larger gro-block. Holes are perfect size for any 1.5 in starter plug. Come in Pack labeled with instructions. Big mama is Grodan largest block ever produced! Big enough to grow a large plant for its entire life. More than twice the amount of wool as our Hugo block.