Grodan Rockwool Cubes 4 x 4 x 2.5

$5.41 USD

Otherwise known as 4″ Large hole

6 Pack is wrapped in plastic like picture


  • Effortless start-up of propagation
  • Uniform WC and EC distribution
  • Easy WC management
  • Excellent root growth throughout the block
  • Greater firmness for better handling

In-store, curbside or delivery!

  • Check Mark Private parking & loading area around back
  • Check Mark Discreet package & labeling on all deliveries
  • Check Mark Minimum 1-year warranty on all products
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Grodan Rockwool Cubes 4 x 4 x 2.5 are cubes  of stonewool (rockwool) that have a grooved base. Promoting drainage to avoid root rot. Grodan Rockwool is pH neutral. Making it easy for you to maintain the ideal hydroponics  pH value of 5.5 – 6.5. Each gro-block is wrapped in white plastic, For shape stability.  Rockwool Cubes have evenly distributed air pores that encourage your plants root growth throughout the entire block.

Additional information

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