Sale and transportation of any quantity of cannabis is a criminal offence, punishable by jail time. The purchase, possession and consumption of cannabis in a public place constitutes a misdemeanour and punishable by a fine and confiscation of the product. Consumption and cultivation by adults in a private space is legal, the latter due to a legal vacuum. Cannabis plants located somewhere visible from the street/public place (ie. from balconies) are considered a serious administrative offense, which leads to a fine from 601 to 30.000€.
About 500 private "cannabis clubs" exist in Spain, 200 of them in Barcelona, and Spain is spoken of as the "new Amsterdam," a destination for marijuana tourists. All actions related to cannabis apart from sale or trade aren't considered criminal offenses, and normally are misdemeanors punishable by a fine.