It is legal to plant 5 Marijuana trees in Jamaica. These weeds can grow into a forest. It grows wild so they sometimes pop up in my yard. I personally don't mess with it. It is a drug and a very powerful one at that. You don't want to mess with this causally. I have seen people get messed up just from drinking the tea and there is a lot of people who went mentally ill because they smoked it with other drugs.
Wild it may not be any good, we call this ditch weed here in the U.S. You have to cultivate it and keep the females away from the male plants. If the females get pollinated, they want produce a lot of THC, the active ingredient in pot. Basically becoming weak in terms as a drug.