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    Delta 4 - 3 x 3 x 2.5 in. Image
    Delta 4 - 3 x 3 x 2.5 in. Image
    Delta 4 - 3 x 3 x 2.5 in. Image
    Delta 4 - 3 x 3 x 2.5 in. Image

    Delta 4 - 3 x 3 x 2.5 in.

    Gro-Blocks with Hole - Stonewool - 8 Blocks Per Strip - Grodan RWDM4G

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    Delta 4 - 3 x 3 x 2.5 in.

    Gro-Blocks with Hole - Stonewool - 8 Blocks Per Strip - Grodan RWDM4G

    Comparable Products

    Delta 4 - 3 x 3 x 2.5 in. Image Delta Big Mama - 8 in. Image Delta 5.6 - 3 x 3 x 4 in. Image Grow Cubes - 1 cu. ft. Image Growing Media - Clay Pebbles - 25 Liters Image
    Description Delta 4 - 3 x 3 x 2.5 in. Delta Big Mama - 8 in. Delta 5.6 - 3 x 3 x 4 in. Grow Cubes - 1 cu. ft. Growing Media - Clay Pebbles - 25 Liters
    Price $4.43 $5.27 $5.63 $16.50 $19.45
    Brand Grodan Grodan Grodan Grodan Grow!T
    MPN (Part No.) RWDM4G RW108001 RWDM56 RW91001 GMC25L
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    Grodan RWDM4G Delta 4 gro-blocks are the perfect size for you to place a 1.5-inch round starter plug, macro-plug, or mini-block. When seedling roots have grown one inch long from the bottom of your starter plug, simply transplant the plug into this 3 x 3 x 2.5-inch block. The Delta 4 block can then be placed on top of a grow slab to provide for a larger growing volume if desired. This is the most uniform block available on the market with its compressed stonewool fibers and improved grooved base to promote superior drainage. Gro-blocks are sold in strips of eight and labeled with instructions.

    Additional Videos


    MPN (Part No.):RWDM4G
    Safety Rating:Not Applicable
    Type:Grow Blocks/Stonewool
    Length:3 in.
    Height:2.5 in.
    Width:3 in.
    Package Quantity:8
    Weight:23.2 lbs.
    Case Quantity:48

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    Some grow lights and accessories have their respective factory warranties stated on our website. 1000Bulbs.com will assist its customers with these factory warranties in the following manner:

    If a product is declared defective and is under warranty; the customer is asked to contact customer service or their account manager and ask for a return merchandise authorization. (RMA) With the RMA, our customer may return the declared defective product at the customer's expense, for factory testing. When the factory tells 1000Bulbs.com that the product is defective and not a product that has been improperly installed, we can credit our customer for the product and we will also credit the original shipping costs of that original purchase. If a replacement is needed, it must be ordered and paid for as if it were a new order. (A credit for the defective may take from 2-4 weeks to be declared acceptable under warranty.) Any and all remedies concerning Hydroponics Supply purchases will follow guidelines as set forth here. Other products are not returnable under circumstances outside those described above.

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