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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
In Stock

Estimated Delivery Date: - .

  • 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 6 reviews
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V
V.S.
Giant Hyssop 'Black Adder'

Plants came in fresh and in great shape. I put them directly in my garden and there has been no wilting at all. I can't wait to see them as grown up blooms.

W
W.W.
Plants

They arrived in great shape and are growing. They are about to flower and I couldn’t be happier

J
J.M.
Happy gardener

I have been very pleased with all of the plants that I ordered and will continue to do so. The stock arrives in good condition and they still look extremely healthy

s
s.l.
Black Adder

Yes. All is well. Best condition of any shipped orders so far. The orange rocket is a little droopy and has light brown edges on lots of the leaves. I'm watering all this stuff well each day. Texas Heat. Please let me know what to do about the rocket. The Adder is great. Think I got Zebra grass from y'all. It's good also. Thanks for good service.

V
V.W.
Excellent service.

Plant arrived safely, healthy and in a very efficient manner.

D
D.W.

Arrived in great shape.