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Giant Hyssop 'Black Adder'

  • 100% money-back guarantee
  • Free shipping on all orders over $90
  • Now is the perfect time to plant!
Container Size
  • Giant Hyssop 'Black Adder' adding color and texture to your garden all summer long with tall spikes of purple fragrant flowers that hummingbirds & pollinators will love! These purple flowers sit atop darker green wonderful smelling foliage that have the scent of anise when rubbed between your fingers. Perfect addition to herb, butterfly, wildflower gardens that will give you color when most things are done blooming

    Grows in upright clumps that reach 2-3 ft tall and around 2 ft wide.

    Has a long bloom time from summer into fall. 

    Once roots are established this perennial is drought tolerant and low maintenance. Grow in full sun with well draining soil.

    Deer Resistant

    Deadhead spent blooms to make way for new growth and continual blooming

  •  Shipping Methods

    Orders will be shipped via FedEx Home Delivery.

    Orders are generally in route for 2-5 business days (depending on where you live).

    We are sticklers about packaging and shipping your order in a way that guarantees healthy plants upon arrival. If plants are damaged on arrival, just let us know and we'll send you new ones or offer a full refund.

    All of our plants are container grown and shipped with the soil and roots fully intact. We DO NOT ship your plants bare-root. Being shipped as a containered plant greatly reduces the risk of the plant not surviving the transit to your home.

    Shipping Rates

         Order Total      Shipping Cost
         $0.00 - $90.00           $11.95  
         $90.01+      FREE    
  • When will my order ship?

    Orders are generally shipped within 1-2 business days

     How will my order be shipped?

    Your order will be shipped FedEx Home Delivery. Once shipped, your order should arrive in 2-5 business days.

    How much does shipping cost?

    All orders over $90 ship free. Orders under $90 ship for a flat rate of $11.95.

    Do you guarantee your plants?

    Yes. If, in the rare case your plants are damaged upon arrival, just contact us within 7 days and a full refund or exchange will be issued for those plants.

    Will this plant grow where I live?

    The hardiness zones that each plant will grow in are listed in the plant details section. Please make sure that the plants are rated for the zone you live in. If you don't know what zone you are in, please check the zone map and zip code lookup tool above to find out.

    If I order now, can I delay shipping for sometime in the future?

    Sure. After placing your order, just send us an email with your order number and the date you would like your order delivered.

  • We promise to only send you healthy, well rooted plants. If, in the rare case your plants are damaged upon arrival, or you are not completely satisfied, contact us at hello@thegreenhousepnw.com right away and we’ll take care of it.

    If your plant(s) were damaged on arrival, we will send out replacements to you immediately at no extra charge to you.

    If that plant is no longer in stock, or you prefer to not receive a replacement, we will issue full refund for any damaged plants.

    In some cases, we may simply request a photo of the damaged plant to verify condition of plant before we process replacement or refund.

    If you have any other questions about our refund/replacement policy, please feel free to email us at hello@thegreenhousepnw.com

This Plant's Growing Zones: 6 - 9
What's my zone?

Botanical Name:
Agastache 'Black Adder'
Plant Type:
Perennial
Light Requirements:
Full Sun
Mature Height:
2-3 ft.
Mature Spread:
2 ft.
  • Plant Details

    Giant Hyssop 'Black Adder' adding color and texture to your garden all summer long with tall spikes of purple fragrant flowers that hummingbirds & pollinators will love! These purple flowers sit atop darker green wonderful smelling foliage that have the scent of anise when rubbed between your fingers. Perfect addition to herb, butterfly, wildflower gardens that will give you color when most things are done blooming

    Grows in upright clumps that reach 2-3 ft tall and around 2 ft wide.

    Has a long bloom time from summer into fall. 

    Once roots are established this perennial is drought tolerant and low maintenance. Grow in full sun with well draining soil.

    Deer Resistant

    Deadhead spent blooms to make way for new growth and continual blooming

  • Shipping Details

     Shipping Methods

    Orders will be shipped via FedEx Home Delivery.

    Orders are generally in route for 2-5 business days (depending on where you live).

    We are sticklers about packaging and shipping your order in a way that guarantees healthy plants upon arrival. If plants are damaged on arrival, just let us know and we'll send you new ones or offer a full refund.

    All of our plants are container grown and shipped with the soil and roots fully intact. We DO NOT ship your plants bare-root. Being shipped as a containered plant greatly reduces the risk of the plant not surviving the transit to your home.

    Shipping Rates

         Order Total      Shipping Cost
         $0.00 - $90.00           $11.95  
         $90.01+      FREE    
  • FAQ

    When will my order ship?

    Orders are generally shipped within 1-2 business days

     How will my order be shipped?

    Your order will be shipped FedEx Home Delivery. Once shipped, your order should arrive in 2-5 business days.

    How much does shipping cost?

    All orders over $90 ship free. Orders under $90 ship for a flat rate of $11.95.

    Do you guarantee your plants?

    Yes. If, in the rare case your plants are damaged upon arrival, just contact us within 7 days and a full refund or exchange will be issued for those plants.

    Will this plant grow where I live?

    The hardiness zones that each plant will grow in are listed in the plant details section. Please make sure that the plants are rated for the zone you live in. If you don't know what zone you are in, please check the zone map and zip code lookup tool above to find out.

    If I order now, can I delay shipping for sometime in the future?

    Sure. After placing your order, just send us an email with your order number and the date you would like your order delivered.

  • Our Guarantee

    We promise to only send you healthy, well rooted plants. If, in the rare case your plants are damaged upon arrival, or you are not completely satisfied, contact us at hello@thegreenhousepnw.com right away and we’ll take care of it.

    If your plant(s) were damaged on arrival, we will send out replacements to you immediately at no extra charge to you.

    If that plant is no longer in stock, or you prefer to not receive a replacement, we will issue full refund for any damaged plants.

    In some cases, we may simply request a photo of the damaged plant to verify condition of plant before we process replacement or refund.

    If you have any other questions about our refund/replacement policy, please feel free to email us at hello@thegreenhousepnw.com

Customer Reviews

Based on 16 reviews
81%
(13)
6%
(1)
0%
(0)
0%
(0)
13%
(2)
J
Jan Sanford
Blooms!

The plants arrived in great shape. Followed planting instructions and they have flower buds already! I am so pleased. The Greenhouse is my favorite online nursery.

L
Lorraine Rickman
Giant assop black adder

Arrived with moldy black spots. Are now dead

I just emailed you Lorraine. :) Please reach out anytime with concerns or questions to hello@thegreenhousepnw.com

D
Dixie March
Vigorous plants

I thought there would be a problem as the shipping company said the hyssop would be in transit over a week. As it turned out, that was not the case and the plants arrived in very good condition.
As they came from a much different environment that Savannah, GA I gave them a couple of days in the shade of my palm tree to acclimate. Right now they are actively growing and doing very well!

D
Dana
Wow!

My hyssop, unlike most other plants from GH, was a bit puny. A mere green bean looking plant. Is now, so full and flourishing, I can hardly believe it! I planted in a pot but will surely transplant into the ground because of its large size! Healthy boy!

K
Kathi Gilbert
4 nice plants and one almost dead one arrived

This is the third time you asked me to review my purchase of a black adder. I keep responding and each time I receive another request to review it. It is now dead. I expect a better response considering what I paid for a barely live plant.

H
Heather Jeppson
Great Plants

So far, so good! These have been planted for a couple weeks. No problems so far!

L
Lynn Scannell
Kansas order

The plants were very well packaged, arrived in good shape and were planted as directed. I believe they will do fine in the place that I planted them. Thank you so much.

S
S.Thompson
It’s Alive!

Upon arrival from it’s daring cross country trip, it looked unhappy with a couple of brown spots, it received a deep drink of refreshing spring water and some good rays. It was refreshed and is strong and healthy.

M
Michele Larsen
Perked Up and Healthy

I was amazed at the packaging to keep Black Adder from moving inside. He was a bit bent initially but perked up once given ample sunlight and a deep watering. He is happily enjoying sunbathing on my deck.

C
Claire Runyan
Beautiful plants...

This was my first time ordering from The Greenhouse, and I was a little worried about the cost, being unsure of the condition they'd be in when I received them. I order from lots of places, and I was SO impressed with the care with which they were shipped, the health of the plants, and the size for the price. They came all the way across the country and were in the best condition of any plants I have ordered this year. I will definitely order from you again!