![Growing soil microbes in Winogradsky columns over years.](http://static.sciencelearn.org.nz/images/images/000/001/087/full/soil_microbes_x3_cropped.jpg?1674165454)
The image on the left is soil on the first day, the image in the middle is two weeks later. The image on the right is a column that has been growing for several years.
The conditions within a Winogradsky column allow microorganisms to grow into visible and colourful colonies.