Sonoran Sunset,  A. cana 'Sinning' (21103 bytes)


By Carl Wilson, Colorado State University Cooperative Extension Agent, Horticulture

Hyssop are an exciting group of aromatic plants making a big splash in the plant world. Members of the Agastache genus, hyssop are known for their brightly colored flowers and for attracting hummingbirds and butterflies to the garden. They are generally hardy to Zone 5 Front Range gardens and many can be grown as annuals in containers elsewhere.

Sunset hyssop, A. rupestris, grows to 2 feet in height and bears orange flowers with sunset lavender buds. Brushing against the plants thread-like leaves releases a pleasant root beer aroma. Plant in full sun to partial shade.

Hummingbird mint, A. cana, is scented of bubblegum. It reaches 2 feet in height and 3 feet in width in full sun. The mid to late summer flowers are rose-pink in color.

Hyssop (Agastache aurantiaca) CORONADO (82658 bytes)

Hyssop (Agastache aurantiaca) CORONADOTM

Other hyssops are being introduced to Colorado and tested for their cold tolerance. These include Honey Bee White hyssop, A. rugosa, a 4 feet tall, white blooming giant suitable for the back of borders. Another that can be trialed is the violet-blue flowering Korean hyssop, A. rugosum, that reaches 2 feet in height.

Hyssop is best transplanted when temperatures are warm and are definitely not for fall planting. Avoid water-logged soils.

For late season bloom and fragrance, plant hyssop.

Photos: Judy Sedbrook

Back to Perennials

Back to Flowers

Back to Home



Ask a Colorado Master Gardener | Calendar | Children | Container GardeningCSU Fact Sheets
Credits | Diseases | FAQ | Flowers | Fruits | Gardening | GlossaryHouseplants | Insects & Pests
Lawn & Grasses | Links | New to Colorado | PHC/IPM | Soil | Shrubs | Trees
Vegetables | Water Gardening | Weeds | What's New | Who We Are | Xeriscape


line4.gif (1411 bytes)

Contact Us | Disclaimer | Equal Opportunity

CSU/Denver County  Extension Master Gardener 2010
888 E. Iliff Avenue,  Denver, CO 80210
(720) 913-5278


Date last revised: 01/05/2010