What is Vermiculite? Vermiculite is a mineral made up of magnesium, aluminum, and iron silicates and is used as a soil amendment, says Jane Dobbs, expert gardener and gardening te ...

Gardeners and horticulturists have been using vermiculite in plant propagation for many years. It's particularly useful when ...

VERMICULITE consists essentially of mica-like silicate layers separated by double sheets of water molecules carrying exchangeable cations, the cations being located midway between the water sheets ...