Size Range of Perlites

Particle Size: Typically, particles are larger than 1/2 inch (12.7 mm) in diameter.

Texture: Noticeably coarse, with a more uneven texture compared to other sizes.

Applications: Commonly used for specialty horticultural purposes, especially for orchids and other plants that require superior drainage and air circulation. It can also be used in stormwater filteration systems.

Particle Size: Generally ranges from 1/4 inch (6.35 mm) to 1/2 inch (12.7 mm) in diameter.

Texture: Coarse but relatively uniform.

Applications: Popular in horticulture for potting mixes, to improve soil aeration and drainage.

Particle Size: Often between 1/8 inch (3.175 mm) and 1/4 inch (6.35 mm).

Texture: Medium to fine-grained particles; more uniform in size than Coarse grade.

Applications: This size is versatile and widely used. In horticulture, it’s a common choice for general potting soil mixes and seed starting mediums. In industrial settings, it’s employed in lightweight insulating concrete and plasters.

Particle Size: Ranges between 1/16 inch (1.5875 mm) and 1/8 inch (3.175 mm).

Texture: Fine but still retains the distinct porous structure.

Applications: Used in certain horticultural applications where finer soil texture is desired, like in propagation trays.

Particle Size: Typically smaller than 1/16 inch (1.5875 mm), approaching a powdery consistency.

Texture: Very fine, almost like dust, yet maintains perlite’s inherent absorbent properties.

Applications: Often used as a filler in products or for specialized industrial processes. Due to its fine nature, it’s effective as a filter aid and can be used as a suspension agent in liquids.