A great Agastache with a name that sounds like it should be a character on Masterpiece Theater! 'Black Adder' prefers poor well drained soil in a sunny locations...do you have these conditions? Dense spires of smokey violet blue cover the plant July-September, attracting zillions of butterflies and hummingbirds. I have also found that the cut flowers dry beautifully. Grows 30-36" tall.