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Grodan Granulate - 20kg

20 Kilo Bag Of Grodan Granulate 

Grodan Granulate is an ultra-clean, sterile substrate for hydroponic production. Granulate rockwool can be effectively used in recirculating or run-to-waste systems and has a very high water holding capacity. Grodan Granulate is compressed into a 20kg bale, but makes around 140L of growing medium.

  • Inert, sterile medium designed for horticulture
  • Care should be taken when handling rockwool by wearing gloves and mask
  • Suitable for a variety of hydroponic system designs
  • Very high water holding capacity (retention)
  • Can be mixed with other substrates to achieve desired moisture holding capacity. 
  • Perfect for large operations.