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Description
Centaurea Acaulis, commonly known as stemless knapweed, is a species of flowering plant in the family Asteraceae. It is native to Europe and Asia, and has been introduced to North America as an ornamental plant.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Centaurea |
Appearance
Centaurea Acaulis grows to a height of 10-15 inches, with a spread of 12-18 inches. It has narrow, lance-shaped leaves that are gray-green in color. The flowers are a bright pink or purple, with a distinctive cone-shaped center that is surrounded by spiky bracts. The flowers bloom in early summer and continue into the fall.
Care Guide
Centaurea Acaulis prefers well-drained soil that is rich in organic matter. It should be watered regularly, but not over-watered, as it is susceptible to root rot. Fertilizer should be applied in the spring and fall, using a balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium. Centaurea Acaulis prefers full sun, but can tolerate some shade. It is hardy in Zones 3-8.
Common Pests & Diseases
Centaurea Acaulis is susceptible to aphids, spider mites, and powdery mildew. These pests and diseases can be prevented by maintaining good plant hygiene and using an insecticidal soap or a fungicide as needed.
Habitat
Centaurea Acaulis is native to grasslands and meadows in Europe and Asia. It is a hardy plant that can tolerate a wide range of soil and climatic conditions.
Question and Answer
Q: Is Centaurea Acaulis a good plant for beginners?
A: Yes, it is relatively easy to care for and can tolerate a range of growing conditions.
Q: How often should I fertilize Centaurea Acaulis?
A: Fertilize in the spring and fall, using a balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium.
Q: Can Centaurea Acaulis be grown in containers?
A: Yes, it can be grown in containers as long as the soil is well-drained and it is watered regularly.
Q: How long do the flowers of Centaurea Acaulis last?
A: The flowers bloom in early summer and continue into the fall.
Related Plants
- Centaurea cyanus (cornflower)
- Centaurea montana (perennial cornflower)
- Centaurea macrocephala (yellow knapweed)
- Centaurea scabiosa (greater knapweed)
References
- Missouri Botanical Garden: Centaurea Acaulis
- University of Arkansas Division of Agriculture: Stemless Knapweed
- Gardenia.net: Centaurea Acaulis
