Fiber Phenotype

Fiber phenotype refers to cannabis plants selectively bred for elevated cellulose and hemicellulose content in stems and stalks, rather than cannabinoid production. These plants are cultivated primarily for industrial applications including textiles, bioplastics, paper, and construction materials. Fiber-dominant plants typically exhibit taller growth patterns, stronger stem structure, and lower THC/CBD concentrations compared to flower-focused cultivars. Lineage records frequently report fiber phenotypes emerging from European hemp breeding programs, particularly in countries with established agricultural regulations. The distinction between fiber and flower phenotypes represents a fundamental breeding direction, with seed selection and cultivation practices optimized around biomass yield and material properties rather than secondary metabolite profile.

Breeders working in industrial hemp focus on fiber phenotype selection to maximize stem yields and material quality for processing. Selective breeding for stalk strength, plant height, and cellulose content directly impacts commercial viability in non-flower applications.