PlantsAnise Hyssops→Anise Hyssop (Agastache 'Black Adder')

Common names:
Give a thumbs up Anise Hyssop
Give a thumbs up Giant Hyssop
Give a thumbs up Hummingbird Mint

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Full Sun to Partial Shade
Water Preferences: Mesic
Soil pH Preferences: Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Maximum recommended zone: Zone 9b
Plant Height: 24-36 inches
Plant Spread: 18-24 inches
Leaves: Deciduous
Other: Black licorice (anise) when crushed. Blue-green.
Flowers: Showy
Other: Bottlebrush-like
Flower Color: Blue
Other: Light violet-blue with dark purple bracts
Flower Time: Late spring or early summer
Late summer or early fall
Other: Deadhead faded flower stems to ensure more flowering throughout the season. To frost.
Suitable Locations: Xeriscapic
Uses: Cut Flower
Dried Flower
Suitable as Annual
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Drought tolerant
Propagation: Seeds: Can handle transplanting
Other info: Sterile
Propagation: Other methods: Division
Containers: Suitable in 3 gallon or larger
Needs repotting every 2 to 3 years
Needs excellent drainage in pots
Awards and Recognitions: Other: 2014 Great Plant Picks award winner
Parentage: Agastache rugosum x Agastache foeniculum

Black adder blooms for more than 2 months

Garden Tours: MarilynGarden Tours: Marilyn
By Sharon on May 6, 2012

We are on our way to northern Kentucky to take a look at Marilyn's gardens. Be sure to click on the images so you'll see the whole picture; you don't want to miss anything!

(Full article38 comments)
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'Black Adder' was a featured
Plant of the Day for May 4, 2019.

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Posted by Marilyn (Kentucky - Zone 6a) on Mar 15, 2013 11:00 PM

I love Agastache 'Black Adder'! I love to see the Butterflies, Bees and/or Hummingbirds on it, getting nectar from it. I have at least three plants in my front yard flowerbed and I am getting two more to plant there.

It is a beautiful and colorful Agastache! Easy to grow if you have excellent drainage and sun. Other than that, it is undemanding and happy.

It warms my heart to see them on it!

Another wonderful Agastache! Can't have too many of them in my yard!

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Plant Events from our members
chelle On April 9, 2015 Obtained plant
Replacement plant. Previous plants perished winter of 2013/14.
piksihk On March 14, 2016 Plant Ended (Removed, Died, Discarded, etc)
piksihk On August 4, 2014 Bloomed
HamiltonSquare On October 27, 2017 Plant Ended (Removed, Died, Discarded, etc)
flaflwrgrl On October 7, 2015 Obtained plant
From Santa Rosa Gardens 2 plants.
GaNinFl On April 13, 2016 Obtained plant
Received from Santa Rosa Gardens
» Post your own event for this plant

Discussion Threads about this plant
Thread Title Last Reply Replies
Very nice, Marilyn by SongofJoy Jul 2, 2014 4:33 PM 5
What are you feeding that thing? by GaNinFl Feb 18, 2016 6:08 AM 2
Great photo! by amyscoutmom Jun 23, 2017 7:42 AM 0
Agastache seedling questions help by MariposaMaid Apr 14, 2016 11:10 AM 8
Agastache Rupestris ?varieties by jg0613 Sep 14, 2015 12:25 AM 16
Windwalker Royal Red Salvia by jg0613 Sep 14, 2015 1:29 AM 32
Truly perennial Agastaches by Joy May 17, 2015 2:45 AM 13
Plant List Orders For 2015 by Marilyn Apr 20, 2016 12:57 AM 20
Agastaches are in bloom now.. by Skiekitty Sep 11, 2014 11:46 AM 28
Agastache 'Black Adder' by Marilyn Oct 8, 2013 12:10 PM 4
My Mail Order Plants For 2013 by Marilyn Apr 4, 2013 12:13 AM 43
Mail Order Places To Buy Agastaches by Marilyn Aug 27, 2015 11:18 PM 20
Talking Agastaches by SongofJoy May 18, 2014 8:53 AM 229
Let's talk about Salvias & Agastaches! (CLOSED) by Danita Oct 27, 2012 10:05 AM 432

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