Grow Medium Perlite

Perlite is an amorphous volcanic glass expanded through high-temperature processing, commonly used as a soil amendment and hydroponic medium in cannabis cultivation. The material's porous structure provides excellent drainage and aeration, reducing root rot risk in containerized systems. Breeders and cultivators working with perlite-amended substrates often report consistent moisture regulation across growing trials. Perlite is frequently blended with coco coir, bark, or peat moss rather than used alone, as pure perlite lacks organic nutrient content. The medium's neutral pH and inert chemistry make it compatible with various feeding regimens.

Controlled-environment breeders use perlite-based mixes to standardize root-zone conditions across phenotype selection trials, isolating genetic expression from substrate variables. Consistent drainage characteristics help ensure uniform plant development when comparing genotypes side-by-side.