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Description
Silphium Asteriscus, also known as Starry Rosinweed, is a flowering plant native to the southeastern United States. It is a member of the Asteraceae family and can grow up to six feet tall. This perennial plant is known for its yellow flowers that bloom in late summer and fall, attracting bees and butterflies.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Silphium |
| Species | Asteriscus |
Appearance
Silphium Asteriscus has a sturdy stem and large leaves with serrated edges. The leaves are lance-shaped and can grow up to eight inches long. The plant produces multiple flower heads, each with 10-20 yellow ray florets and yellow disk florets. The flowers bloom from August to October and can attract a variety of pollinators.
Care Guide
Silphium Asteriscus is a hardy plant that can tolerate a range of conditions. It prefers full sun and well-drained soil but can grow in partial shade and clay soil. Water the plant regularly during the first growing season to help establish its roots. Once established, it is drought-tolerant and does not require additional watering. Fertilize the plant with a balanced fertilizer in the spring. Silphium Asteriscus is hardy in USDA zones 4-9.
Common Pests & Diseases
Silphium Asteriscus is generally resistant to pests and diseases. However, it may be susceptible to leaf spot and powdery mildew in humid conditions. To prevent these diseases, avoid overhead watering and provide good air circulation around the plant. Insect pests such as aphids and spider mites may infest the plant, but can be controlled with insecticidal soap or neem oil.
Habitat
Silphium Asteriscus is native to the southeastern United States and can be found in open woods, meadows, and roadsides. It is commonly grown in gardens and is a popular choice for attracting pollinators. The plant is a host for the Silphium moth, which lays its eggs on the leaves.
Question and Answer
Q: Is Silphium Asteriscus deer-resistant?
A: Yes, Silphium Asteriscus is deer-resistant.
Q: Can Silphium Asteriscus be grown in containers?
A: While Silphium Asteriscus prefers to be grown in the ground, it can be grown in large containers with well-draining soil.
Q: How often should Silphium Asteriscus be fertilized?
A: Silphium Asteriscus should be fertilized once a year in the spring with a balanced fertilizer.
Q: How tall does Silphium Asteriscus grow?
A: Silphium Asteriscus can grow up to six feet tall.
Related Plants
- Silphium integrifolium
- Silphium laciniatum
- Silphium perfoliatum
- Silphium terebinthinaceum
References
- Missouri Botanical Garden: Silphium asteriscus
- University of Florida IFAS Extension: Silphium asteriscus
- North Carolina State University Extension: The Silphiums: Big and Bold Native Perennials
