Cannabis Cultivation Lawyers

Cannabis cultivation occupies a characteristic grey area of Spanish criminal law. Personal drug consumption is not a crime in Spain (only an administrative infraction under Organic Law 4/2015), but Art. 368 CP sanctions the cultivation, processing or trafficking of narcotic substances. There is no express regulation of self-cultivation for personal use, which has generated rich Supreme Court case-law that has consolidated criteria to differentiate unpunished self-cultivation from criminally typical cultivation. As criminal lawyers specialising in offences against public health, we articulate coordinated criminal, technical and expert defence focused on the self-consumption doctrine.

The typical modalities of criminally investigated cultivation are varied. Professional indoor cultivation at home with intensive electrical installation (400-1000W HPS or LED lamps, extractors, climate control, automated irrigation, frequently powered through illegal grid connection - Art. 255 CP). Outdoor cultivation on terraces, gardens and plots visible from outside, losing privacy coverage to invoke self-consumption. Cultivation in industrial warehouses or remote rural land, almost always classified as organised trafficking due to the scale of the operation. Cannabis social clubs, regulated by the Supreme Court's shared-consumption doctrine and subject to high criminal risk. And the production of extracts and derivatives (BHO, rosin, artisanal hashish) that multiply the concentration of active principle and the quantitative qualification.

The penalties applicable to cannabis trafficking (substance not causing serious harm to health, Art. 368.2 CP) are significantly more lenient than those for cocaine or heroin: prison from 1 to 3 years and fine. When the quantity exceeds significant amount (in cannabis: 10 kilograms of dry plant material, approximately 2.5 kg of pure THC according to consolidated case-law), the aggravated type of Art. 369 CP applies with prison from 3 to 4 years and 6 months. If structured criminal organisation or group concurs, penalties may reach 6 years' prison under Art. 369 bis CP. The instrumental offence of electricity defraudation (Art. 255 CP) adds fine of 3 to 12 months. Beyond the custodial penalty, full confiscation of the cultivation installation, vehicles used, cash and, where applicable, the property where the activity took place when criminal affectation is certified, proceeds.

The technical defence articulates several complementary lines. First, the counter-weighing expertise: the Guardia Civil habitually weighs the material in gross (entire plants including stems, roots, non-active leaves); we demand weighing exclusively of the dried flowering tops (buds with real THC concentration), a reduction that may reach 80-90% of gross weight and undo the qualification of significant amount. Second, the expert certification of habitual personal consumption of the grower through hair toxicology analysis, treatment-centre reports, medical history of therapeutic use and qualified testimony. Third, the nullity of the home search: mere cannabis smell or abnormal electrical consumption are not sufficient indications to violate Art. 18.2 SC; if the entry was made without sufficiently reasoned court order, all derived evidence is null. Fourth, the separation of offences between cultivation and electricity defraudation to avoid contagion effect in the penalty. Fifth, the challenge to evidence obtained through drones or thermal cameras on private property without specific judicial authorisation.

In current forensic practice we observe sustained growth in cannabis-cultivation proceedings, especially linked to professional indoor cultivations in rented flats, outdoor plantations in rural areas of the Levant, Galicia and Andalusia, cannabis social clubs investigated by the Narcotics Brigade, and the CBD and industrial hemp industry in the delicate regulatory balance between the AEMPS and the Public Prosecutor's Office. Act 17/1967 on narcotics, Organic Law 4/2015 on Citizen Security Protection, Organic Law 1/2025 on Justice Service Efficiency and recent case-law on circumstantial evidence, toxicological expertise and shared consumption have significantly hardened the evidentiary regime. At Alonso Sala, we tackle each file with forensic toxicology experts, electrical engineers, lawyers specialised in administrative-sanctioning law and tiered procedural strategy maximising the possibility of reconducting trafficking to unpunished self-consumption.