Can I grow one cannabis plant for personal use in Switzerland?

No. Growing cannabis at 1% THC or above is prohibited in every canton, including for personal use. The CHF 100 fixed penalty only covers possession of up to 10 grams.

How many CBD plants may I grow?

Hemp below 1% total THC is permitted; there is no federal limit on plant count. Depending on the canton, notification or permit duties apply and compliance with the threshold must be demonstrable.

Are there cantons where growing is tolerated?

The law is the same everywhere. Only enforcement intensity varies — a lenient practice is not permission and does not protect you from proceedings.

What happens if an indoor grow is discovered?

Seizure of the plants and proceedings under Art. 19 NarcA. The sanction depends on quantity, professionalisation and evidence of supply; in rented flats, termination of the lease is an added risk.

Can I buy and possess seeds?

Seed trading is tied to plant-variety law and THC potential and remains legally delicate. Growing THC varieties from them stays prohibited in any case.

Cannabis cultivation: the legal situation in all 26 cantons

Growing THC cannabis is prohibited throughout Switzerland — the legal basis is federal, in the Narcotics Act. What differs is how strictly each canton enforces it, and which exemptions apply to hemp, research and pilot trials.

At a glance

Private cultivation of cannabis above 1% THC is prohibited in all 26 cantons, including for personal use.
Hemp below 1% THC may be grown; cantonal notification and permit duties apply.
Legal THC cultivation exists only with a Swissmedic licence (medicine, research) or inside an approved pilot trial.
Cantons differ in enforcement: lenient practice in Zurich and Geneva, strict prosecution in several rural cantons.
Cultivation is never a minor matter: it triggers ordinary criminal proceedings, not a fixed penalty.

What federal law says

Cannabis with a total THC content of 1% or more counts as a prohibited narcotic (Art. 2 NarcA together with the narcotics schedules ordinance). Cultivation, production, possession and supply are prohibited.

The CHF 100 fixed penalty introduced in 2013 applies only to possession of up to 10 grams for personal use by an adult. Cultivation does not fall under it: growing plants exposes you to ordinary proceedings under Art. 19 NarcA, regardless of whether the harvest was meant for sale or personal use.

Three exemptions exist: hemp below 1% THC, Swissmedic-licensed cultivation for medicine and research, and production for an approved pilot trial under Art. 8a NarcA.

All 26 cantons in one table

The legal position on THC cultivation is identical nationwide — enforcement practice is not. The "enforcement practice" column describes how strictly police and prosecutors act in observed practice; it is an observation, not a legal basis.

Hemp below 1% THC: what is permitted

Growing hemp varieties with less than 1% total THC is permitted and forms the basis of the Swiss CBD sector. Several layers apply: variety selection with documented genetics, per-batch analysis, in some cantons a notification duty to the agricultural authority, plus food and cosmetics rules once you process the material.

Outdoor growers should account for the threshold being exceeded through stress or a late harvest: if THC rises above 1%, the crop legally becomes a narcotic — even without intent.

Permitted — Varieties below 1% total THC, with batch analysis and variety documentation.
Notifiable — In several cantons, a cultivation notification to the responsible cantonal office.
Prohibited — Any crop above 1% THC without a Swissmedic licence or pilot-trial approval.

What happens if you are reported

When a grow is discovered, the usual sequence is a house search, seizure of the plants and proceedings for a Narcotics Act offence. What matters is the number of plants, estimated yield, degree of professionalisation (tent, lighting, ventilation) and any indication of supply to others.

For small personal-use quantities, cases often end with a monetary penalty or fine plus a record. For larger setups, prosecution for commercial offending, confiscation and — in rented accommodation — a real risk of extraordinary termination of the lease are added.

What the Cannabis Products Act could change

The draft from the Social Security and Health Committee foresees a regulated model with licensed producers, quality requirements and controlled distribution. Limited home growing is part of the debate but politically contested and undefined in detail.

Until a law takes effect — realistically not before the end of the decade — current law applies. For consumers, the legal routes remain a prescription, a pilot trial or legal CBD products below 1% THC.

Frequently asked about growing

Can I grow one cannabis plant for personal use in Switzerland?: No. Growing cannabis at 1% THC or above is prohibited in every canton, including for personal use. The CHF 100 fixed penalty only covers possession of up to 10 grams.
How many CBD plants may I grow?: Hemp below 1% total THC is permitted; there is no federal limit on plant count. Depending on the canton, notification or permit duties apply and compliance with the threshold must be demonstrable.
Are there cantons where growing is tolerated?: The law is the same everywhere. Only enforcement intensity varies — a lenient practice is not permission and does not protect you from proceedings.
What happens if an indoor grow is discovered?: Seizure of the plants and proceedings under Art. 19 NarcA. The sanction depends on quantity, professionalisation and evidence of supply; in rented flats, termination of the lease is an added risk.
Can I buy and possess seeds?: Seed trading is tied to plant-variety law and THC potential and remains legally delicate. Growing THC varieties from them stays prohibited in any case.

This overview does not replace legal advice. Enforcement information is based on publicly available sources and our own observation and may change. For specific questions, consult a lawyer. Last updated August 2026.