Hemp supplies bast fibre and woody hurd that can reinforce polymer composites at 30 to 40 percent loading, or be spun and woven as a textile. It grows fast with little pesticide input.
It replaces glass-fibre-reinforced PP in automotive parts, some rigid packaging and synthetic textiles. The US and EU hemp-plastics segment was estimated at about US$125 million in 2025, and the supply chain is fragmented and immature.
End of life depends entirely on the matrix polymer: a hemp-PP composite is not compostable, and a hemp-PLA composite is industrially compostable only. As a textile, hemp fibre biodegrades.
Drawbacks and greenwashing risks: products marketed as hemp plastic are usually 60 to 70 percent fossil polymer; supply is constrained; performance and price are a premium over glass fibre or PP. Ask for the exact fibre loading and matrix before accepting any plastic-reduction claim.