Perlite is a volcanic rock that has been superheated into very lightweight expanded glass pebbles. 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. Horticulture perlite can be used as a soil amendment or alone as a medium for hydroponics or for starting cuttings. When used as an amendment it helps prevent water loss and soil compaction. Like perlite, vermiculite is another mineral that has been superheated until it has expanded into light pebbles. Vermiculite holds more water than perlite and has a natural "wicking" property that can draw water and nutrients in a passive hydroponic system. If too much water and not enough air surrounds the plants roots, it's possible to gradually lower the medium's water-retention capability by mixing in increasing quantities of perlite.

Perlite 8 Qt $3.95 Add to Wishlist Add to Compare	Perlite 4 cu ft $19.95 Add to Wishlist Add to Compare	Big and Chunky Perlite 4 cu ft $34.95 Add to Wishlist Add to Compare	Vermiculite 8 Qt $3.95 Add to Wishlist Add to Compare
Vermiculite 4 cu ft $29.95 Add to Wishlist Add to Compare