Anise Hyssop (Agastache foeniculum) also called blue giants hyssop, fragrant hyssop or lavender giant hyssop is a species of perennial plant in the mint family. This prairie plant is native to much of north-central and northern North America, notably the Great Plains and other prairies. It can also be found in parts of Canada.

Anise Hyssop is tolerant of deer and drought, and attracts hummingbirds, butterflies and bees making it an attractive selection for gardeners.

Anise Hyssop grows from 2 feet to 4 feet (1.2 m) tall and 1 foot (30 mm) wide. The flowers appear in showy whorls, and occasionally branching at the apex. The plant blooms June to September with bright lavender  flowers that become more colorful near the tip. The flowers produce a light floral scent.

Anise Hyssop was used medicinally by Native Americans for cough, fevers and wounds. The soft, anise-scented leaves are used as a seasoning, as a tea, in potpourri, and can be crumbled in salad. The purple flower spike is favored by bees who make a light fragrant honey from the nectar.