- Full Sun (At Least 6 Hours Of Direct Sunlight)
- Mature Height 2 - 3 Feet
- Mature Spread 2 - 3 Feet
- Growing Zones 6 - 9
There is so much going for the Black Adder Giant Hyssop that it is hard to know where to start. Also known as Agastache 'Black Adder', this giant hyssop produces tall red-violet flower spikes from June until the fall. Furthermore, aromatic foliage that smells of aniseed accompanies the almost-black buds before they bloom. Black Adder grows to around 2 to 3 feet tall and provides interest for months.
A serious pollinator magnet, the Black Adder Giant Hyssop is perfect for drawing in wildlife. It is deer resistant and suited to growing in zones 6 to 9. This perennial is perfect for a variety of garden uses, including dry gardens, wildlife areas, cottage schemes and mixed borders. Black Adder is drought and heat tolerant once established.
Black Adder Giant Hyssop Care
The Black Adder Giant Hyssop requires full sun to thrive. It can cope with most soil types and pH levels as long as the drainage is good. Water for the first season to help it establish. Thereafter, Black Adder can tolerate dry spells and does not need much supplemental water. Fertilization is not generally required. However, to give it a boost, you can mulch it in the spring with a layer of organic matter.
Cut back spent flower stems to just above ground level in early spring. As winter approaches, you can shorten the stems to prevent potential wind damage.
Black Adder Giant Hyssop Spacing
Over time, the Black Adder Giant Hyssop can grow to 2 to 3 feet tall by 1 to 2 feet wide. A spacing of 18 to 24 inches is suitable when planting out in a group.
Black Adder Giant Hyssop Information
USDA Hardiness Zones: 6 - 9 |
Plant Type: |
Light Exposure: Full Sun (At Least 6 Hours Of Direct Sunlight) |
Mature Height: 2 - 3 Feet |
Mature Spread: 2 - 3 Feet |
Spacing: 18 - 24 Inches |
Habit: Clumping, Upright |
Flower Color(s): Purple, Red |
Flower Description: Purple and Red Shades |
Bloom Period: Summer |
Foliage Type: Herbaceous |
Foliage Color(s): Blue, Green |
Foliage Description: Blue and Green Shades |
Seasonal Interest: Summer Flowering |
Watering: Average |
Resists: Deer |
Tolerates: N/A |
Attracts: N/A |
Container Role: |
Uses: Borders, Sensory Gardens, Wildlife Gardens |
Features: Cut Flowers, Fragrant |
Brand: |
Common Name: Black Adder Giant Hyssop |
Other Name(s): Hyssop, Hummingbird Mint, Anise Hyssop |
Scientific Name: Agastache 'Black Adder' |
- SKU:
- 1231020693-pc
Container Sizes
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
![Quart Pot Quart Pot](https://cdn11.bigcommerce.com/s-jmzfi5zcr2/images/stencil/original/image-manager/quart-container-new.jpg)
Quart Pot
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
![2.5 Quart 2.5 Quart](https://cdn11.bigcommerce.com/s-jmzfi5zcr2/images/stencil/original/image-manager/2.5-quart-pot-new.jpg)
2.5 Quart
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
![#1 Pot #1 Pot](https://cdn11.bigcommerce.com/s-jmzfi5zcr2/images/stencil/original/image-manager/1-container-new.jpg)
#1 Pot
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
![#2 Pot #2 Pot](https://cdn11.bigcommerce.com/s-jmzfi5zcr2/images/stencil/original/image-manager/2-container-new.jpg)
#2 Pot
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
![#3 Pot #3 Pot](https://cdn11.bigcommerce.com/s-jmzfi5zcr2/images/stencil/original/image-manager/3-container-new.jpg)
#3 Pot
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
![#3 Pot #5 Pot](https://cdn11.bigcommerce.com/s-jmzfi5zcr2/images/stencil/640w/products/7703/23766/plant__87216.1707922800.jpg?c=2)
#5 Pot
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
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Pre-Ordered Plants
Pre-ordered plants are scheduled to ship in Spring 2025. We carefully plan our shipping dates based on your USDA Plant Hardiness Zone to ensure optimal planting conditions upon arrival. Want it sooner/later? Reach out, and we'll try our best to accommodate.
Estimated Spring Shipping Schedule
Estimated ship week for pre-ordered plants will ship based on growing zones as shown below.
Growing Zone | Estimated Ship Week |
---|---|
Zone 10 | March 24th |
Zone 9 | March 31st |
Zone 8 | April 7th |
Zone 7 | April 14th |
Zone 6b | April 21st |
Zone 6a | April 28th |
Zone 5b | May 5th |
Zone 5a | May 12th |
Zone 4 | May 19th |
Zone 3 | May 26th |
Note: These are only estimated ship dates. Plants may ship out later depending on weather & growing conditions of the plant.
Note: Only plants indicated as pre-order will ship as shown above. All other plants and hard goods will ship as normal.
Plants Shipping Now
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.