When two suburban retirees decide to enter the marijuana trade for extra spending money, it doesn’t take long for things to go haywire. First one of their distributors plunges off the deep end, while the other becomes the object of a conspiracy-minded neighbor’s bizarre fixation. Then there comes a court case, multiple, hysterical calls to 911 and an utterly harebrained burglary, as everyone’s peculiar symptoms deteriorate. Meanwhile, the lives of other neighbors, from DEA agents to smarmy lobbying lawyers who avidly peruse the pages of Peddling magazine are linked to the lunacy of the main characters. In short, Homegrown could easily be called a comic meditation on mental illness.