Artemisia Annua ( Sweet Wormwood / Sweet Annie ) is a common type of wormwood native to temperate Asia, but naturalized in many countries including scattered parts of North America. The growing period of Artemisia annua from seeding till harvest is 190-240 days, depending on the climate and altitude of the production area. The plant should be harvested at the beginning of flowering. At that time the artemisinin content is the highest. Tea brewing method - 1. Rinse the herbs with cold running water then soak it for 30min. 2. Water : Herbs ( 2liters : 30g ) 3. Bring to a boil, lower the heat and simmer for 30min ~ 2hr or more. ( Roots, Seeds or Fruits : 1hr - 2hr / Loose leaves : 10min-30min ) Enjoy!! **Keep refridgerated and drink the tea hot or cold