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    • Photo of Agastache 'Black Adder' flower by Far Reaches Farm

    Photo by Far Reaches Farm

    Used with permission, all rights reserved

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    Agastache 'Black Adder'

    Also Known As

    • Black Adder Anise Hyssop
    • Black Adder Hummingbird Mint
    • Black Adder Licorice Mint

    Plant type

    perennial, herb

    size

    • H: 24"-36"
    • W: 18"-24"

    planting zones

    • 6b-9b

    More Options

    Agastache 'Black Adder' plant details

    Agastache 'Black Adder' is a broadleaf deciduous perennial herb with green foliage. In fall and summer blue and purple flowers emerge. Attracts bees, beneficial insects, butterflies and hummingbirds making it an excellent addition to pollinator gardens. Grows well with sun - mostly sun and regular - low water. Adapts to various soil conditions. Does well in average, rich and well-drained soil. A good option if you're seeking something heat tolerant and humidity tolerant.

    CHARACTERISTICS OF Agastache 'Black Adder'

    Plant type: perennial herb
    Plant family: lamiaceae
    Foliage: deciduous green
    Mature size: 18 IN - 24 IN - wide, 24 IN - 36 IN - tall
    Flowers: blue and purple blooms in fall and summer
    Uses: border plant, container plant, cottage garden, cutting garden, floriferous, fragrant, fragrant foliage, licorice-scented, long-blooming, rock garden, xeric

    GROWING CONDITIONS for Agastache 'Black Adder'

    USDA Zones: 6b - 9b
    Sun exposure: sun - mostly sun
    Watering frequency: regular - low
    Resistant to: deer and rabbit, heat and humidity
    Soil needs: average, rich and well-drained

    Nursery contributed plant descriptions

    Bees, hummingbirds and butterflies all flock to this upright, clump-forming 2-3' hybrid hummingbird mint. Famous for its long, summer-to-frost, display of tubular violet blooms, the showy flowers are densely packed to form the flower spikes. Blossoms emerge from nearly black buds, rising above anise scented blue green foliage. S/M-D

    By: Forestfarm

    Spikes of tubular, smokey-lilac flowers open from dark purple buds for a striking effect. The licorice-scented foliage is edible and good in salads. Excellent planted en masse in the perennial border or in the herb garden. Drought tolerant once established. Blooms from summer until frost. A hybrid between the North American A. foeniculum and the Asian A. rugosa. Deadhead spent flowers to promote additional bloom.

    By: Phoenix Perennials and Specialty Plants Ltd.

    A nectar-rich magnet for hummingbirds. Straight stems support the bottlebrushlike blooms from midsummer until frost. This splendid new introduction between Agastache rugosum and Agastache foeniculum brings late season color and a vertical element to the mixed border or to a favored pot, while wafting a sweet licorice smell and resisting those pesky deer.

    By: Digging Dog Nursery

    Hummingbirds, butterflies & bees oh my! 'Black Adder' will have all three partying it up in your garden with bountiful, deep violet-red blooms that emerge from dramatic black buds on showy 6-8" bottlebrush flower spikes mid-Summer through frost. Fabulous for late-season color! Fragrant, anise scented foliage keeps the deer at bay. To 2-3' high & 1.5-2' wide, it sports a lovely rounded form & doesn't mind hanging out in a container. The love child of A. rugosum and A. foeniculum, it's sterile, which means all of its energy is devoted to pumping out flowers. Good drainage. Megan - Plant Nerd

    By: Annie's Annuals & Perennials

    A great Agastache with a name that sounds like it should be a character on Masterpiece Theater! 'Black Adder' prefers poor, well drained soil in a sunny locations...do you have these conditions? Dense spires of smokey violet blue cover the plant July-September, attracting zillions of butterflies and hummingbirds. I have also found that the cut flowers dry beautifully.

    By: Avant Gardens

    Rumors of deer resistance quickly vaults this plant into the "Most Desired" category of gardeners in Uptown or Marrowstone. We need to re-introduce wolves to Port Townsend. Lots of them. Smokey blue flowers mid summer to frost. Good drainage/drought tolerant/butterflies.

    By: Far Reaches Farm

    Gardening facts about Agastache 'Black Adder' plant

    How to Grow Agastache 'Black Adder'

    • Sun Exposure

      • sun - mostly sun

    • Water Needs

      • regular - low

    • Soil Needs

      • adaptable
      • average
      • well-drained
      • rich

    • Special Situation

      • heat tolerant
      • humidity tolerant

    Features

    • Foliage Color

      • green

    • Flower Color

      • blue
      • purple

    • Wildlife

      • beneficial insects
      • bees
      • butterflies
      • hummingbirds
      • deer resistant
      • rabbit resistant

    • Flower Season

      • fall
      • summer

    • Foliage Season

      • deciduous

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