Black Adder Giant Hyssop, also known as Agastache ‘Black Adder’, is a perennial plant that is known for its striking, dark blue-purple flowers and its attractiveness to pollinators.
This plant typically grows to a height of 2-3 feet with a similar spread. It prefers full sun and is adaptable to a variety of soil conditions, but it thrives best in well-drained, fertile soils. Black Adder Giant Hyssop is also drought-tolerant once established, making it a great choice for xeriscaping or low-water gardens.
The flowers of Black Adder Giant Hyssop are dark blue-purple and appear on tall spikes from midsummer to early fall. The leaves are aromatic and have a minty fragrance when crushed.
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Type: |
Perennial |
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Orgins: |
N. America |
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Height: |
2′ – 3′ |
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Spread: |
1.5′ – 3′ |
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Spacing: |
1.5′ |
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USDA Hardiness Zone: |
5 – 9 |
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Culture: |
Full Sun, Part Sun |
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Bloom Color: |
Purple |
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Season of Interest: |
Summer, Fall |
