Perennial. Yarrow grows well in hot and dry conditions and blooms throughout the summer into the fall.
Achilles, the greatest hero of the Trojan War in Homer’s Iliad, is reported to have used yarrow to stop the flow of blood from his wounds inflicted in battle. It has been scientifically proven that this plant has substances that have blood clotting and anti-inflammatory properties. In the Middle Ages in Europe, yarrow tea was taken to stop internal bleeding. Micmac Indians drank it with warm milk to treat upper respiratory infections.