Agastache mexicana is a species of flowering plant in the mint family known by the common name Mexican giant hyssop. It is native to southern North America and can grow up to 100 cm tall. The leaves are lanceolate or oval-lanceolate. The plant is perennial and self-fertile. Its young lemon scented leaves are used in herbal teas and the leaves are also often used in flavoring foods. This plant can thrive in arid or semi-arid regions, but it is necessary for the seed to pass a cold and humid season which break dormancy in order to produce germination.