
What is Perlite? Uses, Benefits & Common Alternatives
For gardening, look for horticultural perlite, which can be large to medium grade with 1/2–inch—1/8-inch particles. Coarse grade or extra-large perlite with particles larger than ½ inches is perfect for orchids, succulents, and other plants that require good drainage. In construction, perlite is added to plaster or mortar to lighten them ...