Blue Boa bill williams mountain giant hyssop
Agastache 'Blue Boa'
USDA zones5 to 9
SunNeeds full sun (6+ hours)
WaterHandles dry to moist soil
Size2 to 3 feet tall12 to 18 inches wide
- Bloom season
- Summer, autumn
- Bloom color
- Violet blue
- Soil types
- Sand, loam, clay, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Attracts
Notes
'Blue Boa' Bill Williams Mountain giant hyssop (Agastache 'Blue Boa') is a perennial for borders, pollinator gardens, cottage gardens, and low maintenance beds. It is hardy to USDA zone 5, or down to -20°F (-29°C). This plant likes full sun and dry to moist soil of most types. The violet blue flowers are fragrant and attract butterflies, hummingbirds, and bees. It is not a favorite of deer or rabbits, though hungry ones will eat almost anything. The plant also tolerates drought.
Pairs well with Feather reed grass, Delphinium, and Black Baccara rose.