Teasel is a biennial weed that sows viable seed quite regularly. It can be controlled without use of chemicals, at least for smaller infestations by visiting the affected site at regular intervals through the course of several successive years. Allow the plants to reach the early spring or summer of their second year. The plants will begin sending up an erect stem. When it is several feet high, the stem can be cut near the base. The plant should then be unable to send up another stem and should die without flowering or spreading seed.
