Agastache, Blue Boa

Agastache foeniculum

$0.00

Outdoor Plant Size

Back for the 2026 season.

Blue Boa® Hyssop features airy spikes of lightly-scented violet tubular flowers with blue overtones rising above the foliage from mid summer to mid fall. The flowers are excellent for cutting. Its attractive fragrant narrow leaves remain dark green in color throughout the season.

Mature Height: 24 - 36"

Mature Spread: 18 - 24"

Sunlight Exposure: Sun

Water Needs: Moderate

We want you to be completely satisfied with your purchase and confident in your gardening experience. Plants in healthy condition may be returned within 14 days of purchase for a full refund. Non-plant items may also be returned within 14 days if unused and in original packaging. A receipt is required.

Please Note: Images on our website or tags may show plants at full maturity or in bloom. Actual plants may vary in size, maturity, and seasonal appearance at time of purchase.

We want you to be completely satisfied with your purchase and confident in your gardening experience. Plants in healthy condition may be returned within 14 days of purchase for a full refund. Non-plant items may also be returned within 14 days if unused and in original packaging. A receipt is required.

Please Note: Images on our website or tags may show plants at full maturity or in bloom. Actual plants may vary in size, maturity, and seasonal appearance at time of purchase.

Plant Profile

Agastache, Blue Boa

Sunlight Exposure

Sun

Water Needs

Moderate

Landscape Use

Border, Accent, Mass Planting

Growth Rate

Moderate

Growth Shape

Clumping

Flowering Season

Summer, Fall

Foliage Color

Green

Pest + Disease Resistance

Deer Resistant, Rabbit Resistant, Insect Resistant, Disease Resistant

Pollinator + Wildlife Support

Pollinator – Butterflies, Pollinator – Hummingbirds, Benefits Birds

Season of Interest

Summer

Fall Color

Green

Garden Performance & Beauty

Flowers for Cutting, Fragrant, Repeat Flowering

Environmental Tolerances

Cold Tolerant, Juglone (Black Walnut) Tolerant

Winter Foliage

Deciduous

Chalet Quality Guaranteed

Each plant is carefully selected by our horticultural experts to ensure top quality, health, and beauty—bringing the best of nature to your home

Local Delivery

Our local delivery service brings plants right to your doorstep, with expert care to ensure they arrive healthy and thriving.

Need Help?

You can make an appointment with our plant specialist for your next visit to our store, or email us.