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Crushed Glass as Soil Amendment Grows Better Plants

A recent University-based study demonstrates that incorporating glass sand into soil produces plants that are larger, more vibrant, and healthier than plants grown in “control” soil that do not incorporate glass sand. In the study, a mixture of 20% glass sand and 80% soil produced superior tomato plants. The plants appear to have benefited from the water retention properties of the glass sand, as well as the presence of silica, a necessary nutrient for plant growth. Further, the study demonstrated that glass sand had no effect on the pH balance of the soil, as glass is inert. Another positive benefit of using glass sand is that greenhouse gas emissions are vastly reduced (by almost 70%) over applications incorporating mined sand. We hope to see more such studies in the future and encourage patrons to experiment with our glass sand in their home gardens and share their results!

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