Tanacetum vulgare, commonly known as Tansy, is a perennial herbaceous plant in the Asteraceae family. It is native to temperate regions of Europe and Asia and has naturalized in many parts of North America. Tansy has a rhizomatous growth habit and produces clusters of small, yellow, button-like flowers. It has a long history of use in traditional medicine and as an insect repellent.
Tansy is relatively easy to care for. It prefers full sun and can tolerate a range of temperatures, though it thrives in moderate climates. Watering should be done sparingly, allowing the soil to dry out between waterings. Tansy can tolerate average humidity levels and does not require special humidity conditions.
Soil
Tansy prefers well-draining loamy soil but can adapt to various soil types. It does best in soil that is not overly rich in nutrients. Good drainage is essential to prevent root rot.
Fertilizer
Tansy does not require regular fertilization. If desired, a light application of a balanced fertilizer in the spring can support growth, but it generally thrives in nutrient-poor soils.
Repotting
Tansy can be repotted if necessary, typically in the spring. Choose a pot with good drainage and use a well-draining soil mix. Repotting is usually only needed if the plant becomes root-bound or if you want to divide the plant.
Propagation
Tansy can be propagated by division or from seeds. Division is best done in the spring or fall. Simply dig up the plant, separate the rhizomes, and replant them. Seeds can be sown directly in the garden in the spring.
Pruning
Pruning is beneficial for Tansy to maintain its shape and encourage bushier growth. Prune back the plant after flowering to prevent self-seeding and to keep the plant tidy. Deadheading spent flowers can also promote more blooms.
Toxicity
Tansy is toxic to pets and humans if ingested. All parts of the plant contain toxic compounds, particularly the leaves and flowers. Symptoms of poisoning can include stomach pain, vomiting, and in severe cases, convulsions. Handle with care and keep away from children and pets.
Additional
Tansy has been used historically as a natural insect repellent. Planting it in the garden can help deter pests. However, due to its invasive nature, it is important to manage its spread by regular pruning and monitoring.
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