how to display zero values in charts

I have a series of bar charts that I am displaying for cumulative statistics showing organic chemical components. Some of these have a value of 0.0 and it is desirable to show this. As an example, if an element ‘x-desy3-9’ has a blue color legend, and it’s value is 0.0 grains in the excel column, I would like to show a “flat square” of blue on the floor of the chart. For some reason, I cannot get this to display. Thanks for any input you can offer.

Well, a height of 0 when viewed from the side is nothing, so use a 3D look column chart.