Hemp: an ancient fibre for a sustainable future

Hemp (Cannabis sativa L.) is an annual herbaceous plant known for its vigorous growth. It can reach heights of up to six metres and develops a deep and robust root system. Flowering begins in late summer and varies according to the variety: equatorial sativa strains are characterised by a prolonged flowering period, while temperate indica varieties complete their cycle within 8–10 weeks. Pollination occurs through the wind and in autumn, the plant produces round fruits containing highly nutritious seeds.

Hemp is native to Central Asia and it is spreaded across the world thanks to its extraordinary versatility and the remarkable strength of its fibres. Its cultivation dates back to the Neolithic period and that testifies to a long and fascinating history. The oldest known hemp artefact which was a fragment of fabric dating to around 8000 BC suggests that hemp was among the very first fibres used by humankind.

Hemp was considered sacred by Hindu cultures and it was used in China for its medicinal properties. In Europe, instead, its widespread use was closely linked to the Maritime Republics, which relied on its durability to produce ropes and sails for their powerful fleets. In Italy, between the late 19th and mid-20th centuries, national hemp yarn was internationally renowned, placing the country second worldwide in hemp production, after the Soviet Union.

Hemp provides high-quality fibres that have been used for centuries in the production of textiles, ropes and paper. The processing cycle (including retting, carding and spinning) transforms the plant itself into a valuable raw material.

In the post-war period, global hemp production declined sharply, making way for synthetic petroleum-based fibres and cotton. This marked the beginning of a long period of decline for one of the most useful plants known to humankind. In recent years, however, hemp has experienced a revival which is driven by growing awareness of its environmental and economic benefits.