The late flowering Agastache Blackadder is popular with bumblebees searching for food as autumn closes in.
 On the whole I prefer the original species of plants rather than cultivars derived from them but there are several very attractive Agastache hybrids. 
 Blackadder is a cross between the North American A. foeniculum and A. rugosa which hails from Korea and Japan. Their respective common names Anise Hyssop and Korean Mint indicate the plant's aromatic qualities.