Common Name:-BLUE MIST SPIREA 'Dark Knight' / Type:-PERENNIAL / Light:-FULL SUN, PART SHADE / Water:-LITTLE TO MODERATE / Color:-DARK BLUE / Bloom Time:-SUMMER / Height-48” / Width:-36” / Comments:-Has deeper blue flowers and more of an upright growth habit.Nice small shrub. Considerable drought tolerance, and a long bloom period. Cut back to 1/3 its height in spring to encourage heaviest bloom / Garden Notes:-Blue Mist Spirea is a great plant to bring pollinators and butterflies to your yard.