The *Agastache 'Black Adder'* is a stunning perennial with striking dark purple flower spikes and aromatic foliage. Ideal for sunny gardens and borders, it attracts bees, butterflies, and other pollinators. With a long blooming season from summer through fall and low maintenance needs, *Black Adder* adds vibrant color and life to any garden.
Please note: Plants are living products and may therefore differ from the photo and description. Minor natural imperfections can occur. These often recover in your garden. These plants are vigorous and long-lasting. They are supplied in growing pots and are shipped directly from our partner growers.
At a Glance
- Type: outdoor garden plant
- Height: approx. 10-25 cm
- Pot: Ø9 cm nursery pot
- Care: easy — low maintenance
- Delivery: free delivery across Ireland and 24 more EU countries (5–8 working days), covered by our healthy-arrival guarantee
- Sun or shade
- Full sun
- Height
- 0.5-1 m
- Spread
- 0.1-0.5 m
- Foliage
- Deciduous
- Flowers
- Summer, Autumn
- Fragrance
- Flower
- Time to maturity
- 2-5 years
- Aspect
- West, South
- Hardiness (RHS)
- H4 (to about -5 °C)
Sources: RHS Agastache 'Blackadder' (listed under that spelling)
Ranges come from the RHS Plant Finder and PFAF. They show what each plant tolerates; local conditions vary.
Free delivery, always — on every order across Ireland and the EU 🌿
Typical Delivery Times
Ireland and all EU destinations — 5–8 working days
Delivery times are estimates and may vary based on local conditions.
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