How do the police know that I grow a CBD plant at home?

Growing a CBD plant at home is illegal, and you can receive severe punishment of a few years behind the bar to a hefty fine. Given the punishment, it is not worth growing illegally. Police might not suspect if you grow one plant, but your neighbour could suspect it easily, and if they report it to the police, then you could be in huge trouble.

answer you won't go to prison or recieve a hefty fine for 1 plant. All they'll do it confiscate it, smoke it themselves and then give you a slap on the wrist and tell you not to do it again. No one in the UK has ever been sent down for 1 cannabis plant. The amount if paperwork required just isn't worth the hassle.