No doubt you can compost without a compost thermometer, however how do you know it’s actually hot and actively breaking down? Short of holding your hand above the compost and guessing if you feel some heat, you can quickly and easily insert this compost thermometer into any compost bin, compost tumbler, or your compost pile and check the compost temperature. I typically get a reading within minutes. The dial is easy to read and not only shows the temperature in degrees but the quick read color dial shows, low, med or hot.