Agastache 'Black Adder'

Anise Hyssop

Agastache ÔBlack AdderÕ

Photo Credit: Sunny Border Nurseries


Agastache 'Black Adder'

Anise Hyssop

A pollinator magnet, this nativar bears deep purple buds and violet blue flowers held on dark calyxes, extending the season of color after the flowers are spent. A long blooming perennial that requires little more than sunshine and good drainage to thrive. Fragrant foliage makes this plant deer resistant.

Plant Details

  • Zone: 6 - 9
  • Height: 24-36"
  • Spread: 15-18"
  • Exposure: Full Sun, Part Shade
  • Soil Moisture: Low Water Needs, Moderate Water Needs
  • Drought tolerant: Yes, Once Established
  • Bloom time: Early Fall, Late Summer, Midsummer
  • Foliage Color: Green Shades
  • Flower Color: Blue Shades, Violet Shades
  • Fragrant: Yes
  • Good Cut Flower: No
  • Native: Nativar
  • Deer resistant: Yes
  • Rabbit resistant: No
  • Bee-friendly: Yes
  • Attracts butterflies: Yes
  • Attracts hummingbirds: Yes
  • Groundcover: No
  • Roy Diblik Favorite: No

Plant Details

  • Zone: 6 - 9
  • Height: 24-36"
  • Spread: 15-18"
  • Exposure: Full Sun, Part Shade
  • Soil Moisture: Low Water Needs, Moderate Water Needs
  • Drought tolerant: Yes, Once Established
  • Bloom time: Early Fall, Late Summer, Midsummer
  • Foliage Color: Green Shades
  • Flower Color: Blue Shades, Violet Shades
  • Fragrant: Yes
  • Good Cut Flower: No
  • Native: Nativar
  • Bee-friendly: Yes
  • Deer resistant: Yes
  • Rabbit resistant: No
  • Attracts butterflies: Yes
  • Attracts hummingbirds: Yes
  • Groundcover: No
  • Roy Diblik Favorite: No

Grower Information

  • PowerPlug Size(s): 32s
  • Optimal Planting Time: Spring
  • Retail Sales Window: Fall, Summer
  • Moisture in Production: Average, Low
  • Requires Shade in Production: No
  • Vernalization Required for Bloom: No
  • Vernalization Beneficial: Yes