Growstones are breakthrough, high-performance growing mediums that are 100% recycled glass and 100% American made. Our highly porous, chemical and toxin-free hydroponic growth mediums and soil aerators are engineered to deliver proper air and water balance in the roots without the danger of overwatering. They can be customized to fit a wide range of plants and climates as well as different growing systems.


Growstones’ Revolutionary Growing Mediums and Horticultural products are:


  • Highly porous and provide high aeration to roots
  • 100% recycled and 100% American made
  • Not strip-mined like Hydroton and perlite
  • Non-toxic and chemical free
  • Lightweight, Dust-free
  • Impossible to overwater
  • pH stable after preparation
  • Proven yields
  • Non-degradable
  • Non-compacting
  • Reusable
  • Inert

Growstones 42L