Winner of the Perennial Plant Association Perennial Plant of the Year.
According to the Perennial Plant Association:
The Perennial Plant of the Year (PPOY) program began in 1990 to showcase a perennial that is a standout among its competitors. Perennials chosen are suitable for a wide range of growing climates, require low maintenance, have multiple-season interest, and are relatively pest/disease-free. If you are looking for an excellent perennial for your next landscape project or something reliable for your gardens, make sure to check out the Perennial Plant of the Year archive list.