Agastache 'Black Adder'

Agastache 'Black Adder' is a standout perennial featuring tall spikes of deep violet purple flowers with darker calyxes that create a rich two tone effect. Its aromatic foliage, long bloom period, and strong drought tolerance make it a top performer in sunny low maintenance and pollinator focused plantings.

Height & Spread: 24 - 36 in x 18 - 24 in

Bloom Time: Mid summer to fall

Light Requirements: Full sun

Soil Preference: Well drained soils; prefers lean conditions

Watering Needs: Low; highly drought tolerant once established

Deer Resistance: High deer resistance

Native Status

Hybrid cultivar with parentage from North American Agastache species.

WILDLIFE & INSECTS

Bees

• Highly attractive to bumblebees and a wide range of native pollinators.

Butterflies

• Provides abundant nectar throughout its long bloom period.

Hummingbirds

• Tubular flowers are a strong attractor for hummingbirds in sunny gardens.

Spacing & Landscape Use

Spacing Recommendations

• Space 18 - 24 in apart for upright clump formation.

Landscape Placement

• Ideal for borders, pollinator gardens, and dry landscapes where long lasting color and fragrance are desired.

Companion Plants

• Echinacea purpurea - Adds bold flower form and strong pollinator support.
• Salvia nemorosa - Provides contrasting bloom timing and vertical structure.
• Coreopsis verticillata - Enhances fine texture and extends seasonal color.
• Schizachyrium scoparium - Adds upright movement and warm season interest behind flowering spikes.