Agastache scrophulariifolia Purple Giant Hyssop

Ohio Native Plant Natural Range

To view the natural range of Agastache scrophulariifolia visit the USDA Natural Resources Conservation Service website.
Red Spotted Butterfly on Purple Giant Hyssop
Purple Giant Hyssop

Cultivation Information Agastache scrophulariifolia


Height - 6 ft - Flower Color - Purple - light purple not deep like ConeflowersBlooms - July - OctoberSun - Sun/Part SunSoil - Medium to moistHardy Zone - 3 to 8Family - Lamiaceae
Over the Years - One would speculate, as a member of the mint family Giant Hyssop would make itself known all over the yard. We have noticed just the opposite.
Seed Provenance Agastache scrophulariifolia
Everwilde Farms, WI 2012 - Nodding Onion Gardens 2013 - present
Purple Giant Hyssop flowers look a bit like Taper Candles

Wildlife Significance Purple Giant Hyssop

Pollinator Specialist - The small sweat bee, Dufourea monardae relies on this specific plant for nourishment Pollination - By Bumblebees, honeybees and other long-tongues beesNectar For Butterflies - Painted Lady, Red Admiral, Monarchs and sulphurs Visited by - Humming birds and butterflies, Green Metallic bees and bee fliesDeer - Avoid this plant
Xerces Societies - Top 37 wildflowers that attract pollinators
Propagation Notes Agastache scrophulariifolia
Stratifying Seeds
Supplies Needed For Stratification
1. Zip lock plastic bag2. Few table spoons of Vermiculite3. Dampened vermiculite - not soggy4. Store in refrigerator for 60 days Seeds placed in Cold Moist Storage Purple Giant Hyssop seeds are similar in size to a grain of pepper after they have been through a grinder, but brown, lighter and much easier to loose. With small seeds, I like to place a white piece of paper under where I am working. This way when I do spill them all is not lost When Sowing - Agastache scrophulariifolia seeds need light in order to germinate. After they have been resting in a cold moist environment, and it is time to plant them, it is important not to cover the seed with soil. The "alarm clock" for these little guys to get up and get growing is a combination of light and warm temperatures.