Vermiculite is a naturally occurring mineral (magnesium-aluminum-iron silicate). is lightweight, non-toxic and sterile and does not deteriorate over time. It has a neutral pH. Vermiculite can absorb three or four times its weight in water and also attracts various plant nutrients such as potassium, magnesium and calcium.
How to Use:
Use 1/3 to 1/2 vermiculite in your potting soil for containers or when building your raised beds, or improve your garden soil by adding it in with your other soil amendments and compost.