Growstone manufactures, markets, and sells engineered products for both the commercial and retail horticulture markets. The company provides growers, master-gardeners and novices with products that enhance plants and crop yields while also delivering a positive impact on the environment. The core of Growstone's products is its patented foam glass soil substitute which has been independently verified to increase crop yield by the world's leading agricultural universities. Growstone is a 'green product' made from recycled glass.

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