Essential oil obtained by steam distillation of leaves and flowers of cultivated plant. Sweet camphoraceous top note and warm spicy-herbaceous undertone. Warm & vibrant, can promote alertness and clarity of thought. Use in fragrancer to help protect rooms from infection, during winter colds. May help relieve congestion. Can be useful when there is a high pollen count during summer months (to sniff only). Sacred to the Greeks and the Hebrews where Hyssop brooms were used to clean out sacred places. Properties: Warming, vibrant.