Vermiculite is the name of a group of hydrated laminar minerals (aluminum-iron magnesium silicates). Horticultural vermiculite is processed with high temperatures which produce flake like particles that are completely noon-toxic. The flake then expands into an accordion shaped pellet composed of multiple layers of thin plates.
GardenersDream offer this product in a large variety of sizes ranging from 0.5L up to 200L with free UK postage. This is the leading product in improving soil aeration.
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