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'Blue Boa' Agastache has long blooming purple flower spikes

Agastache 'Blue Boa' - Anise Hyssop

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Blooms, and plenty of them: that's what both you and the butterflies want from a perennial, and that's what 'Blue Boa' agastache (sometimes called anise hyssop) will give you! This is quite simply one of the longest-blooming perennials you can plant, providing months - not mere weeks! - of nectar-filled blue flower spikes. Watch butterflies and other pollinators flock to it every day.

Agastache is a true sun-lover, and thrives in well-drained, even dry soil. It's the perfect way to transform a difficult spot into a butterfly oasis! This is a fairly large perennial that benefits from a good amount of space, but don't worry: it more than earns its keep in flower production and butterfly attraction.

Vital details:

Plant size: 3' tall x 2' wide

Light: full sun (6+ hrs/day)

Water: Enjoys average to low soil moisture, will not tolerate prolonged wet or soggy conditions.

Hardiness: USDA zone 5-10 (Find your hardiness zone)

Pollinator value: attracts butterflies of all types, as well as other pollinating insects

Features: Rabbit resistant, native, low flammability, heat tolerant, dry soils, deer resistant, best for beginners

Pot size: one quart

Plant name: Agastache 'Blue Boa' pp#24,050

Customer Reviews

Based on 8 reviews
Ziska C.


Hello! We're so sorry to hear about your plant. Please email pictures of any plant(s) in question to, making sure to put your order number and name in the subject line so that we may provide the best assistance possible. Rest assured, we do have a 60 day guarantee on all of our plants. If you received your plants within that timeframe, we will be happy to apply your warranty once we receive the pictures. Happy Gardening!

Olivia C.
Blue boa hummingbird mint

Doing great- it’s growing quickly, started to
Bloom- very happy with my purchase!!

Hi Olivia, thank you for leaving a review! We're so glad to hear that you're loving your new plant. Happy Gardening!

You can't buy any better blue boa's

The healthiest plants I have ever ordered !

Plant was dead

Plant arrived dead.

Diane G.
initially smut/mold grew on leaves

While the plant is doing reasonably well, initially after planting it in the ground, the leaves had a dry powdery smut/mold and holes in the leaves. This seems to be improving now.