In the UK, growing weed is usually a pretty clandestine procedure. It has to be, really, considering it's still very much illegal and can see you handed anything from a community service sentence to a decade in prison.
Good news for green-fingered smokers, then, that the United Kingdom Cannabis Social Clubs (UKCSC) have recently launched a system that, in theory, would help you battle a court case if your grow was busted.
There are four categories of cannabis grows in the eyes of the law. Category 1 is where your operation is capable of producing enough for commercial distribution, and the remaining categories work their way down to number four, meaning nine or less plants, which can be considered a "domestic operation".
The UKCSC sells a kit containing branded tags complete with unique serial numbers, and a poster bearing a notice for the police. You can use these to tag up to nine plants in one grow location, which signifies your operation is not one with criminal intentions. In other words, you are not a street or commercial dealer.
So why would you need to grow nine plants if you don't intend to deal? The idea is that this one garden provides for multiple cannabis consumers who are part of a "collective" – a "separate and legally distinct group of consenting adults that wish to avoid engaging with the black-market by the communal growing and sharing of cannabis", according to the UKCSC website.