The Swiss hemp story

TL;DR

• Hemp-fibre finds in Swiss lake-dweller sites date back > 2,500 BCE.
• Medieval key raw material for ropes, sails, clothing.
• Commercial cultivation until the mid-20th century, then displaced by synthetics.
• 1951 Narcotics Act criminalised THC-cannabis; industrial hemp remained legal until 1975.

From lake dwellings to industrialisation

Archaeological finds in Zug, Zurich and Neuchâtel document hemp seeds and fibres from the Neolithic. In the 18th-19th centuries hemp was cantonally promoted — Vaud, Valais and Ticino ran specialised hemp mills. Only after 1945 did imported cotton and nylon marginalise demand (Clarke & Merlin 2013).

From useful hemp to banned drug

The 1951 Narcotics Act ratified the 1925 Geneva Opium Convention and brought cannabis under control. The 1975 revision fully banned high-THC hemp cultivation; industrial hemp < 1% THC remained legal.

The historical shift in hemp use in Switzerland

For centuries, the agricultural importance of hemp cultivation in Switzerland was closely linked to the self-sufficiency of the rural population. Particularly in the pre-Alpine regions and the Mittelland, the plant served as an indispensable raw material for the production of textiles, ropes, and paper. Decentralised processing in local hemp mills shaped the landscape and represented an important source of income for farms. It was only the increasing globalisation of trade routes and the import of cheaper raw materials that heralded the end of this traditional era.

With the advent of synthetic fibres and the industrial processing of cotton, Swiss industrial hemp rapidly lost its competitiveness during the twentieth century. Large-scale hemp fields disappeared almost completely from the Swiss agricultural sector, as cultivation was no longer economically viable. This structural change took place gradually, even before regulatory measures restricted the handling of the plant. As a result, valuable agricultural knowledge about the breeding and processing of this robust fibre plant was also temporarily lost.

• Significance for historical self-sufficiency in the Swiss Plateau
• Loss of competitiveness due to cheap cotton imports
• Displacement of traditional hemp mills by industrialisation
• Structural change in Swiss agriculture prior to the bans

Legal developments and the threshold in the Narcotics Act

The legal classification of cannabis in Switzerland is based significantly on the Federal Act on Narcotics and Psychotropic Substances. A decisive turning point in recent Swiss legislation is the definition of the THC threshold. Hemp products with a total THC content of less than one percent are not considered narcotics under the Narcotics Act (BetmG) and can therefore be purchased legally. This threshold, which is liberal by international standards, has led to a renaissance of industrial hemp in Switzerland and to a flourishing market for CBD products that are subject to strict quality controls.

The law provides clear rules for the consumption and possession of THC-rich cannabis above this threshold. Adults caught with up to ten grams of cannabis for personal consumption can be fined a fixed penalty of one hundred francs, although the enforcement of this regulation is subject to cantonal differences. This decriminalisation of small quantities reflects the legislature's efforts to regulate consumption pragmatically, while illegal trafficking continues to be consistently prosecuted under criminal law.

• Limit of under one percent total THC for legal products
• Fixed penalty proceedings of one hundred francs for minor quantities
• Cantonal differences in the enforcement of legal requirements
• Distinction between legal industrial hemp and illegal narcotics

Modern pathways: Medical cannabis and scientific pilot projects

In recent years, Swiss cannabis policy has taken significant steps towards regulated distribution and medical use. Since August two thousand and twenty-two, medical cannabis has been prescribable by doctors in Switzerland without prior exceptional authorisation from the Federal Office of Public Health (FOPH). This new regulation significantly facilitates patient access to standardised therapeutic preparations. Prescription and dispensing are controlled through pharmacies, which strengthens patient safety and ensures medical supervision by professionals.

In parallel, scientific pilot trials conducted on the basis of the Narcotics Act are investigating the effects of a regulated sale of cannabis for recreational use. These time-limited projects, which involve cities such as Zurich or Basel, are strictly monitored by the Federal Office of Public Health (FOPH). The aim of these studies is to obtain sound scientific data that can serve as a basis for decision-making for a future, health-oriented Swiss cannabis policy. The focus is on the protection of minors and addiction prevention.

• Facilitated prescription of medical cannabis since August 2022
• Scientific pilot trials in Swiss cities according to Art. 8b of the Narcotics Act (BetmG)
• Supervision and licensing by the Federal Office of Public Health (FOPH)
• Focus on the protection of minors, prevention and scientific data collection

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