This coarse, yet lightweight volcanic rock is perfect for starting seeds, rooting cuttings or adding aeration to any growing medium. Perlite has the advantage of being graded by size to give growers options for improving soil texture.

Vermiculite, when combined with peat or compost, promotes faster root growth and gives quick anchorage to young roots. The mixture helps retain air, plant food and moisture, releasing them as the plant requires them.