Cannabis and Mushroom to Kill 90% of Colon Cancers…is another reason you need to start growing your own. I like to grow…things. When I was a child, I grew crystals of all colors and sizes, I experimented with making my own fossils and at one time even accidently made some tear gas by mixing saltpeter and baking soda and I only started getting into plants when I was in my teens. Obviously, cannabis was the first plant I decided to grow on my parent’s roof.