8 Quarts xGarden Horticultural Grade Premium Vermiculite – Extra Chunky

8 Quarts of Horticultural Grade Premium Vermiculite by xGarden (Extra Chunky). Gardeners use vermiculite to aerate their soil and to improve plant root health. Loose and lightened aerated soil improves drainage and prevents soil compaction, which can damage roots. Expanded Vermiculite is derived from different minerals and contains silica, aluminum oxide, iron oxide, and magnesium oxide. Vermiculite ore is heated at high temperatures and once heated, the ore expands to up to 20 times its original volume due to the release of water trapped in the ore. Vermiculite particles act as sponges for water retention and is available in various grades of coarseness – The less coarse (chunky) the vermiculite, the more moisture it can retain. Vermiculite is non-toxic, sterile, and PH neutral. Vermiculite also acts as an excellent PH buffer, helping soil maintain a constant PH level, which helps plants to flourish. Vermiculite also adds potassium, magnesium and silica to soil mixes.8 Quarts xGarden Horticultural Grade Premium Vermiculite – Extra Chunky