Blue hyssop is an upright, clump-forming perennial of the mint family that's native to parts of the upper Midwest and Great Plains. It's noted for its mid- to late-summer bloom of lavender to purple flowers and anise-scented foliage. The flowers appear in false whorls, which are densely packed into cylindrical, terminal flower spikes. Their nectar is attractive to bees, hummingbirds and butterflies.
Common Names: giant blue hyssop, anise hyssop
Scientific Name: Agastache foeniculum
Native Status: Canada through Northern U.S.
Plant Type: Herbaceous perennial
Height: 2–4 feet
Flowering Time: June–September
Flower Color: Purple, lavender
Interest: Attracts bees, hummingbirds and butterflies