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Picture of Black Adder Agastache Plant
Picture of Black Adder Agastache Plant Picture of Black Adder Agastache Plant

Black Adder Agastache Plant

11.99
16 review(s) | Add your review
  • - Giant Hyssop, Hummingbird Mint
  • - Agastache x 'Black Adder'
  • - Height: 2-3 feet
  • - Hardiness Zone: 5-9
  • - Exposure: Full Sun
  • - Bloom Time: July-September
  • - Each Quart contains 1 Black Adder Agastache Plant
Plant Features

Black Adder Agastache charms with long-blooming, smoky violet brushstrokes on dark buds, luring pollinators and adding spice to your garden. Born from a passionate union of Agastache rugosum and Agastache foeniculum, Black Adder Agastache rises like a fragrant exclamation point in the garden. Reaching a stately 2-3 feet, its upright, clump-forming habit exudes a sense of controlled chaos, a promise of untamed beauty soon to unfold.

Our Agastache Plants are carefully nurtured without the use of harmful pesticides, ensuring they are safe for your garden and the environment. Guaranteed to arrive alive and thriving!

Planting Instructions:

  • - Can be planted spring, summer, of fall

Soil Preparation:

  • - Ideal soil pH: 6.0-7.5

Watering Specifics:

  • - Water deeply during the establishment period, then allow the soil to dry between waterings
  • - Drought-tolerant once established; avoid overwatering

Fertilizer Type:

  • - Use a light application of balanced, slow-release fertilizer in early spring
  • - Over-fertilization can reduce the plant's aromatic oils and bloom production

Pruning and Training:

  • - Deadhead spent blooms to encourage continued flowering throughout the season
  • - Cut back plants by half in late winter or early spring to promote vigorous new growth

Additional Pest Management:

  • - Naturally resistant to most pests and diseases, making it an easy-care plant

Blooming Indicators:

  • - Blooms continuously from early summer to late fall

Light Requirements:

  • - Can tolerate light shade, especially in hotter climates

Temperature Tolerance:

  • - Thrives in temperatures between 60-85°F
  • - Heat and drought tolerant; does not perform well in overly wet soils

Companion Plants for Agastache:

  • - Euphorbia: Their unique foliage and flowers contrast well with Agastache's spikes
  • - Gaura: Adds a light, airy texture to the garden with its delicate flowers
  • - Penstemon: These perennials bring additional vertical interest and attract pollinators
  • - Sedum: Low-growing, drought-tolerant, and offers a beautiful contrast with Agastache's upright form
  • - Echinacea: Complements Agastache with its vibrant flowers and shared love of sun
Attribute name Attribute value
Plant Characteristics
Height Category Tall
Mature Spread 18-24 inches
Habit Upright
Flower Color Blue, Purple
Foliage Color Green
Attracts Bees, Butterflies, Hummingbirds
Features Cut Flowers, Drought tolerant
Garden Styles Butterfly Garden, Container Garden, Cottage Garden, Pollinator Garden, Prairie Garden, Roof Garden
Plant Used for Aesthetic Appeal, Borders and Edging, Edible, Focal Point, Healing and Medicinal, Thriller, Water Conservation
Pet Friendly Yes
Plant Type Hybrid
Tolerates Sandy soil
Critter Resistance Deer Resistance: High

Product Reviews

5.0

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Top Reviews

Hopefully a hummingbird magnet

Got 2 of these late in the growing season. Hopefully they’ll be a nice attraction for the local hummingbirds next year when they return. As always grow joy sent me 2 healthy plants.

From Trystan | October 31, 2021

Giant Hyssop

Plant arrived well packaged as usual, moist, green and full of roots. It is always exciting to get plants from Grow Joy and bring joy into your life. Bobbie

From Bobbie | October 06, 2021

Healthy Plants!

I ordered the agastache plant along with two other pollinator plants. They arrived in a single box and in good condition. I previously purchased a black adder from another company as a bare root product but it never sprouted even though I followed all planting instructions. I was excited to see live plants available from GrowJoy. I transplanted them from their quart size pots into larger planters and all three plants are thriving. I'm very pleased with my purchase and plan to buy from GrowJoy again.

From Jennifer | July 07, 2020

Black Adder Agastache Plant (Hummingbird Mint)

These healthy Hummingbird Mint plants have grown so big and full, with lots of blossoms, and I can't wait to see them in full bloom! Nancy G.

From Nancy | July 17, 2019

Black Adder Agastache Plant

Got a couple of these late last year and 1 stayed alive during the winter - is growing big, fast and will be blooming any day now. Love this company.

From George | May 11, 2019

healthy plants

Nice size well rooted plant.It shipped the day after I ordered and was very well packaged.

From susan | September 07, 2018

Agastache

I got this plant specifically for bees whom love it. It arrived very well packaged (in fact GrowJoy could teach other companies how to properly ship plants) and growing. It took well to its transplanting and at the moment is quite green and thriving.

From Mary | June 20, 2018

Fun to grow!

I enjoyed watching the Black Adder plant grow. It grows really fast and the plant is interesting before it even blooms. It smells fantastic and the purple isn't as dark as I expected... More of a Lilac color

From jordan | July 11, 2015

Love it!

My Black Adder arrived healthy and happy. I planted it in the center of a new bed and its flourishing! It's my favorite plant to watch grow. Without blooms it's already making a strong statement! I just ordered two more.

From jordan | May 27, 2015

Beautiful, healthy Agastache plants!

I first saw these plants at a place to ride trolleys and knew I had to have them. I found them online at GrowJoy and ordered 3. They came well packaged and fast, a good size and healthy. Beautiful! I planted them quickly and they are doing great. I highly recommend this garden center. Great people, great products!

From Donna | August 22, 2013

Hyssop

Very happy with arrival time and condition.

From Edward | August 08, 2013

Great Agastache Plant!

Beautifully packed, fresh and my Black Adder arrived in great condition. Fast shipping.

From Linda | June 06, 2013

Black Adder Agastache Plant

I love this plant since it is one (maybe only) Agastache that doesn't reseed and become a pest. It is tall and a beautiful color. I was trouble finding it anywhere and delighted to see that GrowJoy offered it. I ordered 3 and all arrived healthy and good size to grow out.

From Jessica | May 23, 2013

Butterflies Love This Agastache!

I have a couple plants of 'Black Adder' in my flower bed in the front yard and love to see Butterflies sipping nectar from the beautiful and colorful flowers! I ordered two so that the Butterflies and myself will have plenty of flowers to enjoy! Love this Agastache!

From anonymous | May 09, 2013

Happy Customer

Black Adder Agastache Plants arrived in excellent condition (as fresh as if I had bought them locally). Packing was perfect no damage to boxes or plants. Plants are vigorous, good size, and healthy. I was able to plant them right away; they are doing incredibly well. I will definitely buy from GrowJoy in the future!

From Katherine | May 09, 2013

Healthy and lovely!

I originally ordered the Raspberry Agastache but, I received a friendly call from GrowJoy letting me know it was out of stock. I opted to purchase the Black Adder instead and I'm very happy with this little plant. My order arrived extremely fast and the plant came healthy with rich, moist soil. I can't imagine what the blooms will smell like but, the leaves have a wonderful fragrance! Somewhat like a sweet licorice as the description states. The leaves themselves are attractive to look at and have soft translucent hairs. I've already planted it and I look forward to seeing this sweet plant grow and bloom.

From anonymous | November 22, 2012

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