Sold out Quick view Compare Agastache 'Black Adder' - GIANT HYSSOP 'BLACK ADDER' Even though this is a hybrid of two species from two different continents, 'Black Adder' will absolutely be one of your pollinators’ favorites. Compact, rounded in stature, covered with purple/blue flowers during the long blooming period. An... $7.99 Add to Wishlist Out of stock
