Agastache 'Blackadder'
Common Names: giant hyssop 'Blackadder'
Family: Lamiaceae
Features:
Long, pointed green, aromatic foliage with toothed edges.
Tall, upright spikes of dark violet-purple to dark blue bottlebrush-like flowers.
Sunlight: Full
Ultimate Height: 0.5 - 1 meters
Ultimate Spread: 0.1 - 0.5 meter
Flowering: Summer - Autumn
Care:
Prune the fading flower spikes