Growing Medium Peat Moss

Peat moss is a soil amendment derived from decomposed sphagnum moss, commonly used in cannabis cultivation to improve water retention and aeration in growing media. Breeders and cultivators incorporate peat moss into substrate blends to create a lighter, more workable medium that supports root development across various phenotypes. Peat moss typically comprises 20–50% of custom soil recipes, often combined with coco coir, perlite, and compost. Its acidic pH (3.5–4.5) requires buffering with lime or other amendments to suit cannabis cultivation ranges. Historical use in horticulture predates modern cannabis breeding, but lineage documentation now frequently notes peat-based substrates in phenotype trials and commercial grow records.

Breeders evaluating root architecture, nutrient uptake efficiency, and phenotypic stability often standardize peat-moss-based media to isolate genetic traits from environmental variables. Consistent substrate composition across generations helps establish reliable lineage records and predictable plant performance.