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  • Giant Hyssop 'Black Adder'

    • Free shipping on all orders over $120
      Limited Time: Free shipping on all orders over $75
    7 items left
    In Stock

    Estimated Delivery Date: - .

    Free Shipping On Orders Over $75
    1-Year Guarantee Included with your order

    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 - $119.99           $14.95  
         $120+      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 $120 or more ship free. Orders under $120 ship for a flat rate of $14.95.

    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 within 30 days of receiving your order, 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.
    • Description

      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 - $119.99           $14.95  
           $120+      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 $120 or more ship free. Orders under $120 ship for a flat rate of $14.95.

      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 within 30 days of receiving your order, 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 25 reviews
    80%
    (20)
    8%
    (2)
    0%
    (0)
    4%
    (1)
    8%
    (2)
    P
    PS Freeman

    Giant Hyssop 'Black Adder'

    M
    M
    Bees (and I) love it

    I ordered total 4 different types of plants including Hyssop. While they travelled in near 90 degree temp, they were such healthy bunch that in a matter of few days, they started to shoot up new leaves. When I planted in the flowerbed I could see every one of them having very healthy roots. The packaging was meticulous and you feel the they were raised and packed with care and love. The hyssop is attracting bees non stop all day and I love seeing them working away putting their little heads in each flower. I am going to order more from them!

    C
    Cindy Hauesler
    Giant Hyssop Black Adder

    My order arrived in good shape, however it later died.

    C
    Carrie Thompson
    Hardy so far

    Looking green and happy in the ground, despite the heat we've had lately. Arrived quickly, all in one piece, I appreciate this company!

    R
    Robert Bracey
    They came here alive!!!

    The 2 plants were alive when they got here. In spite of the temperature of 104 degrees F.

    D
    Debbie Remsen
    Great plant

    All three arrived in perfect condition. So impressed. Looking for my fall garden add ins.

    S
    Sophie Laporte
    Plant size

    well packed and delivered quickly but the plants were small for the size pot

    Thanks for taking the time to leave a review, Sophie! They are just coming out of dormancy and pushing through spring growth right now so they do look small when they first start in the spring, each of our hyssops we grew last year and they flushed out over a foot of tall aromatic growth which you'll be getting soon as they keep growing this season. Unfortunately for spring planting perennials they wont come their full size that they flaunt in the summer until its summer. We do tag them with dormant plant information so this isn't a shock but that can be missed sometimes in the excitement of plant shopping. If there is ever a question or concern please reach out to hello@thegreenhousepnw.com and we are happy to help! :D

    I
    Isabel Simpson
    Waiting for Spring

    My 3 Giant Hyssop Black Adders arrived nicely packed and in good shape. Planted them, and watered, as instructed. They appear green and healthy! Just waiting for some warm weather to watch them flourish!

    B
    Barbara Kohls

    Giant Hyssop 'Black Adder'

    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.

    Free Shipping On Orders Over $75
    1-Year Guarantee Included with your order