Giant Hyssop (Agastache foeniculum) in bloom
Giant Hyssop (Blue Giant Hyssop)
Agastache foeniculum
Mint family - Lamiaceae

Growth habit: Medium-tall clumping perennial

Height: 60 - 90 cm

Spread: 30 - 50 cm

Bloom Time: July - August

Bloom Colour: Purple-blue

Light: Full sun to semi-shade

Moisture: Average to dry

Soil: Average garden soil

Seeding: Seeds germinate well without any special treatment. Sow into pots in early spring or directly into the garden in mid-June. Seedlings are fast growing and can be moved to their permanent location by late summer. See the Plant Info page for more detailed information on growing from seed.

Landscape uses: This is a versatile plant for the garden as it will grow in full sun or light shade. It makes a good cut flower and is one of the easiest plants to grow for the back or middle of the bed. It grows into a nice clump, but will self seed. Extra seedlings are easily pulled or can be transplanted. Suggested spacing for planting is 45 cm.

Interesting features: The crushed leaves of this aromatic perennial smell like a mixture of mint and licorice.

Natural habitat: Open grassland, moist meadows, open woods and woodland edges.

Ecology: Attracts bees, hummingbirds and butterflies.