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Agastache 'Black Adder' (Hyssop)

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Agastache 'Black Adder' (hyssop)

Agastache 'Black Adder' (Hyssop)


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Position: full sun
Soil: well-drained, fertile soil
Rate of growth: average Flowering period: July to October
Hardiness: hardy (borderline)
Hyssops are great for adding height to a border, with whorls of long-lastin long-lasting, tiny flowers arranged like a bottlebrush and pointed, aromatic fresh green leaves that are attractive to butterflies. They are short-lived though, and may need replacing every few years, especially after a cold or wet winter. 'Black Adder' has smoky, violet flowers on long spires from July to October. Try it as part of a Mediterranean scheme or in a sunny, well-drained border among ornamental grasses.Garden care: Don't cut back the faded flower-stems until early spring, as they provide interest in the winter months. Lift and divide congested colonies in spring.

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