The laws around weed are really weird here. There have been some pushes towards legalizing it, so the rules are weird.
You are allowed to have up to 3 plants, but if you are caught drying the 100 grams they produce you can get busted.
Also, if you have like <5 grams on you outside, the police usually don't give a fuck, worst case scenario, they take it and smoke it themselves.
There is a problem with Vietnamese immigrants who grow big time in closed factories and other similar buildings.
The police are focused on them and don't really care for small individual growers.