Black Adder Agastache

This plant is hardy in USDA zones 6 through 9. If you live in a region colder than zone 6, it may not survive the winter outdoors and is best treated as an annual or kept in a container that can be moved to a protected area.

Since the Black Adder Agastache reaches a mature spread of 24 inches, you should space them approximately 2 feet apart, measuring from the center of one plant to the center of the next, to allow for proper airflow and growth.

Yes, this cultivar is considered deer resistant. Its fragrant, anise-scented foliage is generally unappealing to deer, making it a reliable choice for gardens where wildlife browsing is a common concern.

The most critical requirement is excellent drainage. If you have heavy clay soil, amend it with organic matter or grit to improve drainage, as this plant will not tolerate 'wet feet' or standing water.

It is a low-maintenance perennial. Once established, it is quite drought-tolerant, requiring only occasional watering during extended dry spells and a simple pruning in early spring to remove old growth and encourage fresh blooms.

Yes, it is a long-blooming perennial that typically produces its periwinkle flower spikes from mid-summer through the fall, providing consistent color when many other garden plants have finished their season.