Black Adder bill williams mountain giant hyssop
Agastache 'Black Adder'
USDA zones6 to 9
SunNeeds full sun (6+ hours)
WaterHandles dry to moderate soil
Size2 to 3 feet tall18 to 24 inches wide
- Bloom season
- Summer, autumn
- Bloom color
- Smoky red violet
- Soil types
- Sand, loam, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Attracts
Notes
'Black Adder' Bill Williams Mountain giant hyssop (Agastache 'Black Adder') is a perennial for borders, pollinator gardens, and cottage gardens. It is hardy to USDA zone 6, or down to -10°F (-23°C). This plant likes full sun and dry to average, sandy, loamy, or chalky soil. Smoky red violet flower spikes attract butterflies, hummingbirds, and bees. Deer and rabbits tend to pass it by. Deadhead spent flowers to promote more bloom.
Pairs well with Blue grama, Clary sage, and Butterfly bush.