Guerilla Gardening

Some sources for Guerilla Gardening:

http://www.guerrillagardening.org/

http://amerasiaorg.wordpress.com/2010/02/12/urban-gardening-grandma-helps-stave-off-crime/

http://www.laguerrillagardening.org/

http://www.wikihow.com/Start-Guerilla-Gardening

http://www.newsociety.com/bookid/3945