Methods and materials for producing organic syringomycin, the methods include culturing a culture of Pseudomonas syringae and a growth medium including glucose, mannitol, histidine, a magnesium source, an iron source, and a buffer with a pH of from about 6.5 to 7； extracting syringomycin from the culture to yield an extract； and purifying the extract to yield syringomycin.
