Growstones are one of the best hydroponic grow mediums we have seen to date. Ultra lightweight, so it is inexpensive to ship. It has a high silica content to promote strong stems and leaves, and also is very porous to promote aeration, and multiple sites for roots to adhere. And they save the environment because they are recycled!

Growstone products keep waste glass from the landfill by using green technology as an alternative to destructive strip mining of pumice. New products are also creating viable alternatives for additional strip mined materials, such as perlite, vermiculite and haydite (shale). On top of that, these products have superior physical characteristics and performance which exceeds that of the traditional alternatives.