Occasionally June can be very hot. You may need to check rainfall locally and for the next 2-3 months consider transporting water to your plants in the unlikely event of a persistent drought.
Understanding the limits of the grow season at various UK latitudes and locations is your starting point. From there, you should be able to grow autoflower seeds outdoors no matter where you are in the UK.
What does your cannabis grow calendar look like?
• Day length December 1st: 8 hours
• Average temperature: 2-7ºC
• Day length March 1st: 11 hours
• Average temperature: 3–10°C
What are the best cannabis seeds for the UK climate?
Good neighbourliness If the grower is in residence then it can go the opposite way. Perhaps the most surprising tell for having a grower next door might be their over-the-top neighbourliness as they overcompensate in their efforts not to annoy you or make you suspicious as to what they’re up to. As one grower told me: “I’m the nicest, most law-abiding citizen on my street, because the last thing I ever want is to give someone a reason to want to call the police to complain about me.”
Security Growers live in a paranoid world, always wondering when their door is going to get kicked in – not only by the police but by “enforcers”, violent criminals who make their living by stealing cannabis crops. For that reason many of them adopt Fort Knox-like security. Portcullises on the doors, bars on the windows and even CCTV cameras are not uncommon.
Conor Woodman’s film Exposure: Britain’s Booming Cannabis Business is on ITV on 16 October at 11.05pm
Heat Those lights also give off a lot of heat, so the old theory was that the house growing cannabis in the loft would be the one with no snow on the roof in winter. But nowadays growers use internal tents, that isolate a lot of the heat. This makes farms harder for police to spot using their infra-red cameras.
Smell Follow your nose. A cannabis crop takes about three months to produce. During the final four weeks, the plants stink. Earlier this year, Crimestoppers helpfully issued cannabis-farm scratch-and-sniff cards to 210,000 homes in the UK to help you identify the exact bouquet.
Light Growers can’t get away from the fact that internal farming requires a lot of it: 2,000 watts running 12 hours a day in a small bedroom looks a lot like the sun, so look out for windows that are constantly blacked out to cover that up. Cannabis farms in spare rooms will have the tell-tale sign of curtains that never open.
The latest Independent Drug Monitoring Unit report suggests there are now as many as half a million people growing cannabis in the UK, which equates to roughly one on every street. So how can you spot the cannabis farm next door to you?
Activity Not all farms are inhabited by the grower so watch out for signs that there is no one actually living there: unkempt front gardens, or if your neighbour never leaves out any bin bags on collection day.