Black Knapweed, also known as Common Knapweed, is one of the very best plants for supporting pollinators. Its deep purple, thistle-like blooms are nectar-rich and attract a huge diversity of bees, butterflies, day-flying moths and beetles. Flowering from mid-summer into autumn, it helps extend the meadow’s seasonal interest. It is a hardy, upright perennial that adds height, structure and a natural, countryside meadow feel. Even its seed heads are attractive to finches later in the season.