Drug Trafficking for Home Marijuana Cultivation: Defence
In this article
Key Takeaways
- Personal use is not a crime
- 100g marijuana = SC threshold
- Unlawful search = nullity
- 1-3 years (basic type)
Growing marijuana at home for personal use is not necessarily a crime in Spain: consumption is not a crime (in public places, only an administrative offence), and what Article 368 of the Criminal Code punishes is cultivation, production or trafficking intended for third parties. The key is quantity and purpose: the Supreme Court uses a 3-5 day supply as a reference (around 100 g of marijuana or 25 g of hashish); above that, the quantity is an indication of a trafficking purpose that can be rebutted. As a substance that does not cause serious harm to health, the basic offence carries prison of 1 to 3 years and a fine. A home search without judicial authorization, valid consent or strict flagrancy is null, and everything found is unusable as evidence.
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Every year, thousands of people in Spain are arrested for growing marijuana at home. What many do not know is that growing for personal use is not necessarily a crime. The line between personal consumption (not punishable) and trafficking (a criminal offence) depends on factors that police and prosecutors try to simplify, but which a criminal lawyer specialized in crimes against public health can dismantle.
Personal Use vs. Trafficking: When Is It a Crime?
In Spain, the consumption of drugs is not a crime (in public places it is only an administrative offence under the Public Safety Act). What Article 368 of the Spanish Criminal Code (CP) punishes is the cultivation, production, trafficking or facilitation of consumption by third parties.
The key lies in the quantity and purpose:
- Personal use (not a crime): Amounts compatible with personal consumption over a reasonable period (the Supreme Court uses a 3-5 day supply as a reference).
- Trafficking (a crime): Amounts clearly exceeding personal use, presence of paraphernalia (precision scales, sealable bags, loose cash) or indications of sale (messages, ledgers).
Key Quantities According to the Supreme Court
The National Institute of Toxicology sets the following average consumption doses (multiplied by 5 days = reasonable supply):
- Marijuana: Up to 100g of plant matter is considered compatible with personal consumption.
- Hashish: Up to 25g of resin.
Above these amounts there is an indication of a trafficking purpose, not an automatic presumption: it can be rebutted.
How Many Plants Can I Have?
There is no magic number. The Supreme Court weighs the set of indicators:
- A few plants, with proven personal use, usually fit personal consumption (if visible from the street, the fine of Art. 36.18 LO 4/2015 may apply).
- Dozens of plants with professional lighting, industrial ventilation and extractors point to trafficking.
- What is decisive is the estimated yield and whether it is compatible with the person's own consumption.
Was the Search of My Home Lawful?
The inviolability of the home (Art. 18.2 of the Spanish Constitution) is a fundamental right. For a search to be lawful, it requires:
- A reasoned judicial authorization (a court order issued by the judge based on prior indicators, not just smell).
- Free consent from the occupant (without police pressure).
- Strict flagrancy (you are seen entering with the plants).
If they enter your home without any of these three grounds, everything found is null ("fruit of the poisoned tree"). It is one of our most effective lines of defence.
What Penalties Apply?
Marijuana is classified as a substance that does NOT cause serious harm to health, which means lower penalties:
- Basic type: Prison from 1 to 3 years and fine of one to two times the value.
- Substantial quantity (over 10kg): 3 to 4.5 years.
- If you are a habitual user: Mitigating circumstance of addiction which can reduce the sentence and suspend prison if you follow treatment.
Defence Strategies That Work
- Nullity of the search: If there was no court order or valid consent.
- Personal use: Proving your status as a habitual consumer (medical history, witnesses, consumption consistent with the estimated yield).
- Chain of custody: Challenging the weighing, drying and preservation of the substance.
- Mitigating circumstance of addiction: If you are a user, the sentence drops significantly.
- Damage repair: Depositing an amount as "symbolic reparation" to trigger the mitigating circumstance of Art. 21.5 CP.
Frequently Asked Questions
Is CBD legal?
Industrial hemp from authorised varieties, grown for fibre or seed, is lawful, and if your plants are CBD with negligible THC the defence can argue there is no drug for criminal purposes. But you need analytical proof of it.
Can I be charged for having seeds?
No. Cannabis seeds do not contain THC and their sale is legal in Spain. It only becomes a crime when the plant produces the active substance and the quantity exceeds personal use.
Does the smell of marijuana justify a search?
Not on its own. The Supreme Court has said that the smell can raise suspicion, but is not equivalent to flagrancy. Police need judicial authorization to enter based on smell alone.
Have they searched your home and found plants?
Do not give a statement at the police station without a lawyer. We can analyse whether the search was lawful and whether the quantity is compatible with personal use. Your freedom may depend on a technical detail.
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Official text: article 368 of the Spanish Criminal Code (BOE)
Frequently asked questions
Is growing marijuana at home for personal use a crime in Spain?
Not necessarily — drug consumption itself is not a crime in Spain (in public places, only an administrative offence), and Article 368 of the Criminal Code punishes cultivation intended for third parties, not cultivation genuinely limited to personal use.
What quantity of marijuana is treated as compatible with personal use?
The Supreme Court uses a 3-5 day supply as a reference point, around 100g of marijuana plant matter or 25g of hashish resin; above that, there is an indication of a trafficking purpose, which can be rebutted with evidence.
Is there a fixed number of plants that is legal to grow?
No — courts weigh the full picture, including estimated yield, growing setup and consumption history; a small number of plants with proven personal use usually fits personal consumption, while a large-scale setup with professional equipment points toward trafficking.
What makes a home search for cannabis plants lawful?
A search requires either a reasoned judicial authorization, the occupant's free consent, or strict flagrancy (being caught in the act); without one of these three grounds, anything found during the search can be excluded as unlawfully obtained evidence.
Does the smell of marijuana alone justify entering a home?
No — the Supreme Court has held that smell alone can raise suspicion but does not amount to flagrancy, so police still need judicial authorization to enter based on smell without more.
Are cannabis seeds themselves illegal to possess?
No. Cannabis seeds do not contain THC and their sale is legal in Spain; the conduct only becomes potentially criminal once the plant is grown, produces the active substance, and the quantity exceeds what is compatible with personal use.
Is CBD cannabis (low-THC) illegal?
Industrial hemp from authorised varieties, grown for fibre or seed, is lawful, and if your plants are CBD with negligible THC the defence can argue there is no drug for criminal purposes, though this requires analytical proof of the THC content.
Do you need criminal defence in this area?
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This page is for information purposes only and does not constitute legal advice: every case requires individual assessment. How this content is produced and verified: editorial policy.