Nodding Onion Gardens

Native Plant Nursery

Columbia Station, Ohio, USA


Agastache scrophulariaefolia - Purple Giant Hyssop

Ohio Native Plant - Natural Range

To view the natural range of Purple Giant Hyssop visit the USDA Natural Resources Conservation Service website.
Agastache scrophulariaefolia
Agastache scrophulariaefolia

Cultivation Information

6 ft - Mine in 2012 were 4 ft high
Flower Color
- Purple - light purple not deep like Coneflowers
Blooms - July - October
Sun - Sun/Part Sun

Hardy Zone -

Family - Lamiaceae

Purple Giant Hyssop
This bee is so excited he can't stay in one place

Propagation Notes


Stratifying Seeds

Seeds placed in Cold Moist Storage   

Fall 2012 - Seeds Collected at Nodding Onion Gardens 

Supplies Needed For Seed Stratification -

1. Zip lock plastic bag

2. Few table spoons of Vermiculite

3. Dampened vermiculite - not soggy

4. Store in refrigerator for 60 days

 Purple Giant Hyssop
Purple Giant Hyssop

Wildlife Significance

 Pollinator Specialist -The small sweat bee, Dufourea monardae relies on this specific plant for nourishment

PollinationBy Bumblebees, honeybees and other long-tongues bees

Nectar For Butterflies - Painted Lady, Red Admiral, Monarchs and sulphurs

Visited by -Humming birds and butterflies, Green Metallic bees and bee flies

Deer - Avoid this plant

The Xerces Societies Guide to Attracting Native Pollinators - One of the top 37 wildflowers recommended for attracting native pollinators

For detailed information on Purple Giant Hyssop visit the
Illinois Wildflower site
Purple Giant Hyssop
Purple Giant Hyssop in the fall
Plants Provenance - Everwilde Farms, WI 2012 - Nodding Onion Gardens 2013 - present