Brass flower pots are very nice looking when the are clean. To keep your brass looking fresh and shiny, rub a piece of cut lemon over the brass and then polish with a soft cloth.
Another method in cleaning brass flower pots fast is to use an onion that you have boiled in water and rub the onion over the brass and clean with a soft cloth.
Yet another way to clean your brass flower pots is to make a paste of vinegar and flour, rubbing this paste over the brass areas and then buff with a clean cloth for a great shine.