When most people in Ireland hear “hemp”, they think of CBD oil or wellness products. But the plant’s oldest and arguably most important use sits somewhere completely different: fibre. Hemp fibre has been spun, woven and built with for thousands of years, and a quiet conversation is now happening across Irish agriculture about whether this ancient crop could play a serious role in the country’s sustainability future.

What hemp fibre actually is

A hemp plant produces two types of fibre. The long, strong outer fibres (bast) come from the stalk’s exterior and are used for textiles, ropes, paper and high-end composites. The shorter, woodier inner fibres (hurd or shiv) make up the core of the stem and are used for animal bedding, biocomposites and — most notably — hempcrete, a breathable construction material that locks carbon into the building for its lifetime. Fibre varieties grown under Irish conditions can reach three metres tall, producing impressive yields per hectare.

Why “organic” is almost the default

Hemp grows fast, shades out weeds, and has natural resistance to most pests, which means it generally needs little to no chemical input compared with crops like wheat or potatoes. Many fibre growers find that organic certification is a relatively short jump from how the crop wants to be grown anyway. For Irish farmers facing pressure to reduce nitrogen use under the Climate Action Plan, hemp’s low-input profile is genuinely attractive.

The Irish bottleneck: processing

The cultivation side is the easy part. Industrial hemp grown for fibre and seed is legal in Ireland under licence from the Health Products Regulatory Authority (HPRA), licences are now valid for a full year, and farmers can apply at any time. The real constraint is what happens after harvest. Hemp fibre needs to be separated from the woody core in a process called decortication, and Ireland currently has no large-scale industrial decorticator. That means much of the fibre grown here is either exported for processing or used at small scale.

It is the textbook chicken-and-egg problem: farmers will not plant hemp without a processor to buy it, and investors will not build a decorticator without enough hemp going into the ground. Industry bodies like the Hemp Cooperative of Ireland and Hemp Federation Ireland have been working on this for years, and a Teagasc-hosted Industrial Hemp Conference recently highlighted hemp’s alignment with Ireland’s climate goals and the EU’s Common Agricultural Policy.

Where the demand is coming from

• Construction — hempcrete and hemp insulation, increasingly specified in low-carbon Irish builds.
• Automotive — major European car makers already use hemp biocomposites for door linings and parcel shelves.
• Textiles — premium clothing brands seeking alternatives to cotton, which has a far heavier water and pesticide footprint.
• Horticulture — biodegradable matting and growing media.

Why this matters for Ireland

Hemp fibre is not a wellness fad. It is a serious industrial input with a genuine carbon sequestration story, low input requirements, and decades of European data behind it. Ireland imports the bulk of the construction-grade hemp materials used here today, almost all from continental Europe and the UK. A domestic fibre industry would give Irish farmers a high-value rotation crop, reduce imports, and contribute to the country’s climate commitments. It needs investment in processing infrastructure to get there — but the agricultural fundamentals are sound.