Bast Fiber

Bast fiber refers to the strong, flexible fibers found in the phloem tissue of cannabis stems, a trait historically relevant to hemp cultivation and breeding programs. These fibers have been selectively preserved in industrial hemp varieties for centuries, particularly in European and Asian breeding lineages focused on dual-purpose or fiber-dedicated cultivars. The fiber quality, length, and ease of separation from woody core tissue vary significantly across genetic backgrounds, with some landraces and modern breeding lines showing superior processing characteristics. Breeders working in the bast fiber category typically select for plants with longer internodes, thicker stems, and delayed lignification to optimize fiber yield and quality. While primarily associated with hemp genetics rather than high-cannabinoid varieties, understanding bast fiber traits remains relevant to comprehensive

Breeders maintaining dual-purpose or fiber-focused hemp lines intentionally select for robust bast fiber development, stem strength, and fiber separation traits. This selective breeding has produced distinct hemp cultivars optimized for textile, composite, and industrial applications alongside or instead of cannabinoid production.