Often mixed with perlite to create a seed and clone raising growing medium. Vermiculite holds more water than other growing mediums and is unsuitable for Hydro-Pot Hydroponics on it's own. Vermiculite is also often added to soil.

Perlite is a volcanic rock that has been superheated into very lightweight expanded glass pebbles. It is used loose or in plastic sleeves immersed in the water. It is also used in potting soil mixes to decrease soil density. Perlite has similar properties and uses to vermiculite but generally holds more air and less water. If not contained, it can float if flood and drain feeding is used. It can be used alone as growing medium, but doesn't provide enough anchorage for large plants. Perlite is often used to start seed and cuttings, which can be easily transplanted after rooting.