The streets of San Francisco are lined with Pear,Plum and Apple Trees , out of fear that the fruit-trees will make a mess the city planted sterile trees that don’t bear fruit.
The group was started by Tara Hui, who started grafting fruit-bearing branches onto city trees a few years ago. If you want to graft a tree all you need to do is make a slit with a sharp knife in a branch of the hosting-tree , insert a branch of a fruit-bearing tree in the slit of the host-tree and tape it. nature does the rest. And Guerrilla-Grafting was born.