3 x 3 x 3 inch Growing Blocks. Used as a second stage from smaller cubes. Growing blocks are great for ebb and flow hydroponic systems or for use as mid stage for plants eventually going on to Rockwool slabs. The blocks are individually wrapped in plastic on four sides to hold moisture and stop algae growth. The base of each block is grooved for drainage. Blocks are supplied in 24 inch long tear away strips with 8 cubes per strip. Case of 384.

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