Botanical Name: Agastache x 'Black Adder'
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Common Name: Giant Hyssop  
Plant photo of: Agastache x 'Black Adder'
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Water Saving Tip:

Check the soil's moisture level before watering.

You can reduce your water use 20-50% by regularly checking the soil before watering.

  • Anatomy

  • Culture

  • Design

Plant Type

Perennial, Herb

 

Height Range

1-3'

 

Flower Color

Red, Violet

 

Flower Season

Summer, Fall

 

Leaf Color

Green

 

Bark Color

n/a

 

Fruit Color

n/a

 

Fruit Season

n/a

Information by: Stephanie Duer
Photographer:

  • Description

  • Notes

'Black Adder' is an upright, clump-forming giant hyssop that grows to 2 to 3 feet tall and about 2 feet wide. It has a long summer-to-frost season of bloom, with tubular, smoky red-violet flowers that emerge from nearly black buds that bloom in showy, bottle-brush, spikes. Aromatic (anise/licorice scented), lance-shaped to ovate leaves are blue green. Flowers are attractive to bees, hummingbirds and butterflies. Not as drought tolerant as its desert kin, but still a worthwhile addition to the herb garden.