Gives new meaning to "Dude, that's some good shit!" -- Pot seeds that were flushed now flourish Star Tribune | Published Jul 31, 2002 REXBURG, Idaho -- Marijuana plants are flourishing at the sewage treatment plant in Rexburg. Officials say the pot seeds apparently were flushed down the toilet and took root on the banks of the city's sewage treatment ponds. Police cut down 10 marijuana plants, some as high as 3 1/2 feet. But pot isn't the only thing that grows in the fertile environment of human waste. Public Works Director John Millar says he's seen everything from tomatoes to sunflowers. Not wanting to attract curious pot heads, officials aren't saying exactly where they found the illegal weed growing.