Peat Based Growing Media

Peat-based growing media refers to cultivation substrates where sphagnum peat moss comprises a significant portion of the composition, often blended with perlite, vermiculite, or coco coir. Peat offers high water retention and cation exchange capacity, making it a traditional choice in cannabis breeding programs for seedling propagation and vegetative growth. The material's pH typically ranges from 3.5–4.0, requiring amendment for cannabis cultivation. Breeders working with peat systems have documented consistent results in clone rooting and seed germination protocols. Environmental considerations around peat harvesting have led many modern programs toward peat alternatives or reduced-peat formulations.

Breeders historically standardized peat-based media for phenotype evaluation because its consistent water and nutrient availability reduces environmental variables during controlled crosses. Transition from peat to alternatives like coconut coir has prompted breeding programs to recalibrate feeding schedules and microbial inoculation strategies.