Grow Medium Peat Moss

Peat moss is an organic growing medium derived from partially decomposed sphagnum plant material harvested from peatlands. In cannabis cultivation, peat-based substrates are valued for their water retention capacity, low initial nutrient profile, and ability to maintain consistent moisture while allowing adequate drainage when properly amended. Breeders and cultivators working with peat often combine it with perlite, coco coir, or compost to balance aeration and nutrient availability. Peat's acidic pH (typically 3.5–4.5) requires buffering with lime or other amendments to reach the neutral-to-slightly-acidic range preferred in cannabis growing. Historical cultivation records show peat substrates have been central to both seedling propagation and large-scale indoor production systems.

Breeders managing genetic lines often select peat-based systems for seed germination and early vegetative stages due to consistent moisture control and reproducibility across grow cycles. Peat's known chemical properties make it useful for standardizing growing conditions when phenotype-hunting or maintaining mother plants.