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'Black Adder' Giant Hyssop Agastache 'Black Adder'

Other Common Name(s):

Phonetic Spelling
ah-GAH-sta-kee
Description

'Black Adder' Giant Hyssop is a hybrid cultivar cross between A. rugosa and A. foeniculum in the mint family. This plant grows 2-3 feet tall and wide with aromatic leaves and a long bloom season. The dense spikes of reddish-purple flowers will add a vertical accent to the garden and attract bees, butterflies and hummingbirds. Deadhead to prolong blooming.

Good drainage is essential for these plants as they will not survive a winter in wet clay soils. They are drought tolerant once established. Plant in full sun to light shade in the perennial border, a butterfly/pollinator garden, a rock garden or a container.

Problems: Crown rot can occur in wet soils. No major disease or insect problems.

More information on Agastache.

See this plant in the following landscape:
Cultivars / Varieties:
Tags:
#hummingbirds#sun#showy flowers#drought tolerant#purple flowers#fragrant leaves#aromatic#cut flowers#deer resistant#long bloom time#borders#pollinator plant#container#HS302
 
Cultivars / Varieties:
Tags:
#hummingbirds#sun#showy flowers#drought tolerant#purple flowers#fragrant leaves#aromatic#cut flowers#deer resistant#long bloom time#borders#pollinator plant#container#HS302
  • Attributes:
    Genus:
    Agastache
    Family:
    Lamiaceae
    Life Cycle:
    Perennial
    Country Or Region Of Origin:
    Western USA- hybrid
  • Whole Plant Traits:
    Plant Type:
    Herbaceous Perennial
    Perennial
    Woody Plant Leaf Characteristics:
    Deciduous
    Habit/Form:
    Erect
    Growth Rate:
    Medium
    Maintenance:
    Low
    Texture:
    Medium
  • Cultural Conditions:
    Light:
    Full sun (6 or more hours of direct sunlight a day)
    Partial Shade (Direct sunlight only part of the day, 2-6 hours)
    Soil Texture:
    Clay
    Loam (Silt)
    Sand
    Shallow Rocky
    Soil pH:
    Alkaline (>8.0)
    Neutral (6.0-8.0)
    Soil Drainage:
    Good Drainage
    Moist
    Occasionally Dry
    Available Space To Plant:
    12 inches-3 feet
    NC Region:
    Coastal
    Mountains
    Piedmont
    USDA Plant Hardiness Zone:
    6a, 6b, 7a, 7b, 8a, 8b, 9a, 9b
  • Fruit:
    Fruit Type:
    Capsule
  • Flowers:
    Flower Color:
    Purple/Lavender
    Red/Burgundy
    Flower Inflorescence:
    Spike
    Flower Value To Gardener:
    Long Bloom Season
    Long-lasting
    Showy
    Flower Bloom Time:
    Fall
    Summer
    Flower Shape:
    Lipped
    Tubular
    Flower Petals:
    2-3 rays/petals
    Flower Size:
    < 1 inch
    Flower Description:
    2-lipped tubular reddish-purple flowers are densely packed on a 6-8 inch long terminal spike from early summer to fall
  • Leaves:
    Woody Plant Leaf Characteristics:
    Deciduous
    Leaf Color:
    Blue
    Green
    Leaf Value To Gardener:
    Fragrant
    Leaf Type:
    Simple
    Leaf Arrangement:
    Opposite
    Leaf Shape:
    Lanceolate
    Ovate
    Leaf Margin:
    Serrate
    Hairs Present:
    No
    Leaf Description:
    Blue-green lance to ovate shaped leaves with serrated margins
  • Stem:
    Stem Color:
    Green
    Stem Is Aromatic:
    No
    Stem Cross Section:
    Square
    Stem Form:
    Straight
    Stem Description:
    Square green stems
  • Landscape:
    Landscape Location:
    Container
    Naturalized Area
    Patio
    Landscape Theme:
    Butterfly Garden
    Cottage Garden
    Cutting Garden
    Drought Tolerant Garden
    Pollinator Garden
    Design Feature:
    Border
    Attracts:
    Bees
    Butterflies
    Hummingbirds
    Resistance To Challenges:
    Deer
    Drought