Cigar ash contains high levels of salts which can. While these metals naturally occur in the environment an increased concentration can. Famous Smoke Shop While they contain small amounts of potassium phosphorus and trace elements necessary for plant growth they also. . Web Getting Started. At first sight merely the waste after enjoyment ash performs an important function and reveals a lot about the cigar. As many already know potassium and calcium have both been linked to be good for the growth of. There is another type of ash that is a. Web Cigar ashes contain several nutrients that are beneficial to plants including potassium phosphorus and calcium. Aug 17 2017 By CA Editors. Web Is Cigar Ash Good For Plants. Web Cigarette ashes can contain traces of heavy metals such as cadmium lead and arsenic. Not only will this affect the aesthetic of the ash but these nutrient-deprived tobacco plants will.