Best Use:

Perlite is more porous and tends to allow water to drain more readily. As such, it is a suitable addition to soils utilized with plants that do not require very moist media, such as cactus, or for plants that generally thrive in well-draining soil. Due to perlite’s large surface area, it is a good choice for plants that require levels of high humidity. Evaporation of its surface area creates higher humidity levels.