Chamomile comes in many different varieties but the main ones grown are the Roman and German strains. The Roman strain of chamomile is a perennial plant. This means that if you have an existing plant the root will awaken come spring time and produce a plant every year. The German is strain bit different, it is an Annual. This means that the German Chamomile will flower and seed itself at the end of every season and come spring time you will find new plants emerging from the soil.