Blue Boa Agastache

Blue Boa Agastache Delivers Big Color on Upright Flower Spikes

Blue Boa Agastache is a long-blooming perennial grown for its large violet-blue flower spikes, upright habit, and fragrant green foliage. Also known as Agastache Blue Boa, Blue Boa Hummingbird Mint, or Blue Boa Giant Hyssop, this colorful perennial brings strong vertical flower power to sunny borders from summer into fall.

The blooms are larger and showier than many softer blue Agastache varieties. Dense tubular flowers stack along upright spikes, creating a bold bottlebrush effect that stands out in pollinator gardens, cottage gardens, cutting gardens, dry borders, and mixed perennial beds. Use it where you want color, movement, and pollinator activity, without the high-maintenance of a high-maintenance plant.

A Hummingbird Mint That Keeps the Garden Moving

Blue Boa Agastache is a favorite for gardeners who want a lively summer garden. The nectar-rich tubular flowers attract hummingbirds, bees, butterflies, and other beneficial pollinators over a long bloom season.

Plant it where you can enjoy the activity up close, such as near patios, walkways, porches, and seating areas. Repeating Blue Boa in groups or drifts creates a stronger visual display and makes the flowers easier for pollinators to find. It pairs especially well with Echinacea, Rudbeckia, Yarrow, Catmint, Salvia, Bee Balm, Russian Sage, Lavender, and ornamental grasses.

Compact, Upright Growth for Borders and Containers

Blue Boa Agastache commonly grows about 2 to 3 feet tall and 18 to 24 inches wide, making it easy to fit into sunny perennial beds without overwhelming the planting. The upright habit gives the garden height and structure while still staying manageable.

Use Blue Boa in the middle of borders, in pollinator strips, along sunny walkways, in cottage-style beds, or in containers with excellent drainage. Its blue-purple flowers combine beautifully with yellow, orange, pink, white, silver, and burgundy companion plants.

Full Sun, Sharp Drainage, and Drought Tolerance Once Established

Plant Blue Boa Agastache in full sun for the strongest stems and heaviest flowering. It can tolerate light shade, but too much shade may reduce bloom and make the plant less sturdy.

Well-drained soil is essential. Agastache performs best in average to lean soil that does not stay wet, especially during winter. Once established, Blue Boa is drought-tolerant and handles heat well, making it a strong choice for sunny borders, low-water gardens, slopes, raised beds, and containers.

Deer Resistant, Rabbit Resistant, and Easy to Maintain

Blue Boa Agastache is generally considered deer-resistant and rabbit-resistant. Its aromatic foliage has a minty, anise-like fragrance when crushed, which makes it less appealing to browsing animals than many softer-flowering perennials.

Maintenance is simple. Deadhead spent flower spikes to keep the plant tidy and encourage continued bloom. In colder climates, leave stems standing through winter to help protect the crown, then cut back old growth in late winter or early spring before new growth begins.