Knautia arvensis, field scabious
A fabulous wildflower relative of Scabiosa, producing masses of small, pale lilac pincushion flowers on wiry stems above low clumps of rough green leaves. Loved by all sorts of pollinators including bees and butterflies, and flowers off and on all summer long. Handles most soils and garden conditions but flowers best in average-good garden soils in a sunny-ish spot. Flowering height 70-110cm, spread 30-40cm. 9cm pot.