Extracted by steam distillation from the herb, commonly found in hedgerows. Yarrow is associated with Achilles (hence its botanical name) and it is claimed he used it for healing battle wounds. It was also traditionally worn as a charm to protect against evil, as well as to attract love. In China, the stalks of Yarrow feature in ritual divination in the I Ching. A rich and sweet essential oil, Yarrow is high in Azulene (similar to the main chemical constituent of German Chamomile) which is what gives it its dark blue colour. To maintain healthy hair and scalp, try adding 10 drops of Yarrow and 5 drops of Cedarwood to 100ml of unfragranced shampoo and/or conditioner. Use as usual but massage the conditioner well into the scalp and leave for five minutes before rinsing. At the end of a hectic day, try unwinding in a warm bath with the following blend stirred in: 3 drops of Yarrow, 3 drops of Chamomile (German or Roman) and 2 drops of Lavender.