The roots are antibacterial, antifungal and expectorant, and are still used in cough medicines. It has 10" leaves and yellow flowers; the roots yield a blue dye. Its erect stems are deeply furrowed and branch near the top. It becomes a huge and spreading plant in rich garden soil so be sure to give it enough room. Named after Helen of Troy - she was said to be harvesting it when abducted. Packet(Standard): $3.50; 1/8 oz: $7.00; 1/4 oz: $14.00; 1/2 oz: $26.00; 1 oz: $50.00 - 12,000 seeds/oz