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Description
Centratherum is a genus of flowering plants in the family Asteraceae. It includes about 15 species of annual and perennial herbs, native to tropical regions in the Americas. The most popular species is Centratherum punctatum, also known as Brazilian Button Flower or Purple Fleabane. This plant is prized for its beautiful purple flowers and attractive foliage, which makes it a great addition to any garden.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Centratherum |
Appearance
Centratherum punctatum is an upright, bushy plant that grows up to 2-3 feet tall and wide. It has dark green, lance-shaped leaves that are about 2-4 inches long. The plant produces clusters of small purple flowers, each about 1 inch in diameter, that bloom from summer to fall. The flowers are surrounded by a ring of tiny, white bracts, which give the plant its unique button-like appearance.
Care Guide
Water
Centratherum punctatum prefers consistently moist but well-drained soil. Water the plant deeply once or twice a week, depending on weather conditions. Avoid overwatering, as this can lead to root rot.
Fertilization
Fertilize Centratherum punctatum with a balanced, all-purpose fertilizer every 4-6 weeks during the growing season. Follow the instructions on the fertilizer package for application rates.
Soil
Centratherum punctatum prefers well-drained soil with a pH of 6.0-7.0. Amend heavy clay soil with organic matter, such as compost or peat moss, to improve drainage.
Sunlight
Centratherum punctatum thrives in full sun to partial shade. However, it will produce more flowers in full sun.
Hardiness Zones
Centratherum punctatum is hardy in USDA zones 9-11. In colder zones, grow it as an annual or overwinter it indoors.
Common Pests & Diseases
Centratherum punctatum is generally pest and disease-free. However, it may be susceptible to spider mites, aphids, and powdery mildew. Treat these problems with insecticidal soap or neem oil.
Habitat
Centratherum punctatum is native to tropical regions in the Americas, including Mexico, Central America, and South America. It grows in a variety of habitats, including open fields, roadsides, and disturbed areas.
Question and Answer
Q: Is Centratherum punctatum toxic to pets?
A: Centratherum punctatum is not toxic to dogs or cats, but it may cause mild stomach upset if ingested in large quantities.
Q: How often should I prune Centratherum punctatum?
A: Prune Centratherum punctatum in early spring to encourage bushy growth and remove any dead or damaged branches. You can also pinch back the tips of the branches periodically throughout the growing season to promote branching and more flowers.
Q: Can I grow Centratherum punctatum in a container?
A: Yes, Centratherum punctatum can be grown in a container. Choose a pot that is at least 12 inches in diameter and fill it with a well-draining potting mix. Water the plant regularly and fertilize it every 4-6 weeks during the growing season.
Q: How do I propagate Centratherum punctatum?
A: Centratherum punctatum can be propagated from seeds or stem cuttings. To propagate from stem cuttings, take a 4-6 inch cutting from a healthy plant and remove the leaves from the bottom half of the stem. Dip the cut end of the stem in rooting hormone and plant it in a pot filled with moist potting mix. Keep the soil moist and place the pot in a warm, bright location. The cutting should root in 2-3 weeks.
Related Plants
- Centaurea
- Centaurea cyanus (Bachelor’s Button)
- Centaurea montana (Mountain Bluet)
- Centaurea ragusina (Dalmatian Pyrethrum)
References
- Missouri Botanical Garden: Centratherum punctatum
- Gardenia.net: Centratherum punctatum (Brazilian Button Flower)
- University of Florida IFAS Extension: Centratherum punctatum, Brazilian buttonbush
