ROCKWOOL Granulate Loose 20 kg

Regular price $269.99

*NOTE as of August 2022: Grodan raised the price by 300% on this guy!*

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