Size Range of Perlite

The size range of perlite grains is essential as different sizes serve varied purposes across several industries. Let’s dive into the specifics of each size category, from x-large to x-small:

  • X-Large
  • Large
  • Medium
  • Small
  • X-Small

X-Large Perlite

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.

Perlite Extra Large

Large Perlite

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. In the construction sector, it’s used in lightweight plasters and mortars.

Perlite Large

Medium Perlite

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.

Medium Density Perlite

Small Perlite

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.

Small Perlite

X-Small Perlite

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.

Extra Small Perlite
Why Choose Perlite

In Summary

Processed perlite, in its various forms, is a testament to the versatility of this volcanic mineral. Whether in its raw state, expanded for a plethora of general applications, or specifically coated for niche requirements, perlite’s adaptability has solidified its position in numerous industries. Recognizing the distinctions and characteristics of each form ensures that industries and users can harness perlite’s full potential effectively.