Verbascum thapsus, commonly known as common mullein, is a biennial plant in the family Scrophulariaceae. It is native to Europe, North Africa, and Asia but has been widely naturalized in temperate climates around the world. The plant is known for its tall, woolly stems and large, velvety leaves. In its first year, it forms a rosette of leaves, and in the second year, it sends up a flowering stalk that can reach up to 2 meters in height. It has a dormancy period during the winter months.
Common mullein prefers full sun and can tolerate a range of temperatures, though it thrives in moderate climates. It requires well-drained soil and should be watered sparingly, allowing the soil to dry out between waterings. The plant does not require high humidity and can tolerate average household humidity levels.
土壤
Verbascum thapsus prefers well-drained loamy soil but can tolerate poor soil conditions. It is important to ensure good drainage to prevent root rot. The soil should be allowed to dry out almost completely between waterings.
肥料
Common mullein does not require regular fertilization. If desired, a light application of a balanced fertilizer can be applied in the spring to support growth.
换盆
Repotting is generally not necessary for common mullein as it is typically grown outdoors. However, if grown in a container, repotting can be done in the spring when the plant is still in its rosette stage. Use a well-draining potting mix and a container with drainage holes.
传播
Verbascum thapsus can be propagated by seed. Sow seeds in the spring or fall directly in the garden or in seed trays. The seeds require light to germinate, so do not cover them with soil. Keep the soil moist until germination occurs.
修剪
Pruning is not typically required for common mullein. However, deadheading spent flowers can encourage more blooms and prevent self-seeding if desired.
毒性
Verbascum thapsus is not considered toxic to pets or humans. However, the fine hairs on the leaves can cause skin irritation in some individuals, so it is advisable to handle the plant with care.
额外的
Common mullein has been used historically for its medicinal properties, particularly in treating respiratory ailments. The leaves and flowers can be used to make herbal teas and extracts. However, always consult with a healthcare professional before using any plant for medicinal purposes.