Agastache scrophulariifolia (Purple Giant Hyssop)
Agastache scrophulariifolia (Purple Giant Hyssop) is a large perennial in the mint family with square stems and pale lavender flower spikes from July until fall. Reaching about six feet high, this hyssop prefers open woods and prairie situations with moist soils, although it will readily adapt to mesic and dry areas. Its long-blooming flowers are popular with bees and butterflies.
Frequently Asked Questions