Pyrethrum

Tanacetum cinerariifolium

Characteristics and Cultivation Information of Pyrethrum (Tanacetum cinerariifolium)
 - Growth Characteristics
- Pyrethrum is a perennial herbaceous plant belonging to the Asteraceae family, characterized by silvery-gray feather-shaped leaves and white flower heads.
- It grows to a height of approximately 30–60 cm and primarily blooms in the summer.
- It thrives in cool climates and sandy soils and prefers locations with plenty of sunlight.
 - Propagation Methods
- It can be propagated by seeds, stem cuttings, or division.
- It is common practice to germinate seeds indoors in the spring and transplant them in late spring.
- Stem cuttings are taken in the spring or autumn; they are cut from a healthy mother plant and secured to a physical support until roots develop.
 - Cultivation Methods
- Well-drained sandy soil is preferred, and it does not grow well in locations with poor drainage.
- It must be cultivated in a location with sufficient sunlight, and excessive moisture should be avoided. - Fertilizer is necessary during the growing season, but excessive fertilizer can actually be harmful.
- It is recommended to mulch during the winter to protect the roots.
 - Use in the Garden
- Pyrethrum contains pyrethrin, which has pest-repelling effects, so it is also used as a natural pest control agent.
- It is popular as a chrysanthemum or garden plant due to its beautiful flowers and leaves, and is mainly used as a boundary plant or for group planting.
 - Major Pests and Diseases and Control Methods
- It may be susceptible to pest infestations such as grubs, aphids, and slugs.
- Pests can be physically removed or natural pest control agents can be used.
- You can also directly apply pyrethrum extract containing pyrethrin.
- To prevent fungal diseases caused by overwatering, ensure good ventilation and regulate watering.

Pyrethrum is a relatively easy plant to care for; if the appropriate conditions are met, it can grow healthily and add both beauty and functionality to your garden.

Plant Type
Plant Family	Asteraceae
Height	60cm
Spread
Colors	white
Bloom Period	June to August
Water Needs	commonly
Exposure	Sunny
Freezing Resistance	-10°C

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