Botanical Name: Agastache hybrid ‘Blue Boa’

Common Name: Hummingbird Mint

Hardiness Zone: Perennial in Most Climates (USDA Zones 6–10)

Size: 24–36" Tall × 18–24" Spread

Growth Habit: Upright, Well-Branched Habit

Sunlight: Thrives in Full Sun

Soil: Prefers Well-Drained Soil; Tolerates Poor or Rocky Soils

Water Needs: Low to Moderate Once Established; Drought Tolerant

Bloom Season: Early Summer through Fall

Fertilizer: Light Feeding in Spring; Avoid Excess Nitrogen

Features: Oversized Deep Blue-Violet Flower Spikes, Aromatic Foliage, Heat Tolerant, Deer Resistant, Exceptional Pollinator Plant

Uses: Ideal for Pollinator Gardens, Perennial Borders, Cottage Gardens, and Mixed Plantings

Patent: ✔ Patented

Plant Patent: PP24,050 

Propagation: ❌ Propagation Prohibited Without License

See our complete Agastache Growth & Care Guide for full care details.

More About Agastache ‘Blue Boa’

Agastache ‘Blue Boa’ is widely regarded as one of the most impressive hummingbird mints available today, prized for its massive, thick flower spikes and intense blue-violet coloration. The blooms are significantly larger and denser than those of traditional Agastache, creating bold vertical accents that remain vibrant from early summer through fall.

Bred for improved garden performance, ‘Blue Boa’ combines the dramatic look of classic varieties like ‘Black Adder’ with a sturdier, more controlled growth habit. The result is a plant that stands tall without flopping, even in full bloom. Aromatic, anise-scented foliage adds another layer of interest while helping deter deer and other browsing animals.

Why We Like It (Our Trials)

In our trials, ‘Blue Boa’ consistently delivers outstanding performance in heat, humidity, and dry conditions when planted in well-drained soil. In full sun, it establishes quickly and produces continuous flower spikes without requiring deadheading or staking.

Pollinator activity is exceptional. Hummingbirds are frequent visitors, joined by bees and butterflies throughout the season. We also appreciate how clean and intentional the plant looks in the landscape—its upright habit and oversized blooms make it feel bold and architectural rather than loose or weedy. Customers often single it out as a “showstopper” in pollinator gardens.

Agastache ‘Blue Boa’ vs. Other Agastache Varieties

Agastache ‘Blue Boa’ is prized for its bold color, dense flower spikes, and more controlled structure compared to many traditional Agastache varieties. When set against taller selections like ‘Black Adder’ or ‘Blue Fortune’, Blue Boa stands out for its thicker, tightly packed blooms and sturdier, more upright habit. Where older or looser forms can read wispy or open as the season progresses, Blue Boa maintains strong visual mass and consistent flower density, making it especially effective as a focal plant in mixed borders and pollinator plantings.

Compared to compact series such as ‘Beelicious® Pink’, Blue Boa occupies a comfortable middle ground—offering more height and drama without becoming oversized or unruly. Its rich violet-blue coloration is deeper and more saturated than softer tones like ‘Sunrise White’, and it pairs especially well with warm selections such as ‘Kudos® Coral’ for high-contrast designs. For gardeners seeking a hummingbird magnet with bold presence, excellent branching, and season-long reliability, ‘Blue Boa’ is one of the strongest Agastache selections available today.