Contents
Description
Cirsium Muticum, commonly known as Swamp Thistle, is a wildflower that belongs to the Asteraceae family. It is native to North America and can be found in marshes, swamps, and wet meadows. This plant has a stout stem that can grow up to six feet tall and is covered in spiny leaves. The pink-purple flowers bloom from July to September and attract butterflies and bees.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Cirsium |
Appearance
The Swamp Thistle has a stout stem that is covered in spiny leaves. The leaves are alternate, deeply lobed, and can grow up to eight inches long. The flowers are pink-purple and grow in clusters. They can grow up to two inches in diameter and bloom from July to September. The roots of this plant are deep and fibrous.
Care Guide
Swamp Thistle is a hardy plant that can grow in wet soil. It prefers full sun but can tolerate partial shade. This plant is drought-tolerant once established but requires regular watering during the growing season. It can benefit from fertilization in the spring with a balanced fertilizer. It prefers well-draining soil that is rich in organic matter.
Swamp Thistle is hardy to USDA Hardiness Zones 4-9.
Common Pests & Diseases
Swamp Thistle is relatively pest and disease-free. However, it can be prone to aphids, spider mites, and whiteflies. These pests can be controlled with insecticidal soap or neem oil. Root rot and powdery mildew can occur in poorly drained soil or humid conditions. These diseases can be prevented by providing adequate drainage and good air circulation around the plant.
Habitat
Swamp Thistle is native to North America and can be found in marshes, swamps, and wet meadows. It prefers wet soil and can tolerate flooding. This plant attracts butterflies and bees and provides food and habitat for wildlife.
Question and Answer
Q: Can Swamp Thistle tolerate flooding?
A: Yes, Swamp Thistle can tolerate flooding and is often found in wet meadows and marshes.
Q: How tall can Swamp Thistle grow?
A: Swamp Thistle can grow up to six feet tall.
Q: What is the blooming period of Swamp Thistle?
A: Swamp Thistle blooms from July to September.
Q: How can I control pests on my Swamp Thistle?
A: Pests such as aphids, spider mites, and whiteflies can be controlled with insecticidal soap or neem oil.
Related Plants
- Cirsium arvense
- Cirsium discolor
- Cirsium horridulum
- Cirsium pumilum
References
- “Cirsium Muticum.” Lady Bird Johnson Wildflower Center, University of Texas at Austin, www.wildflower.org/plants/result.php?id_plant=CIMU.
- “Cirsium Muticum.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=m890.
- “Swamp Thistle.” Illinois Wildflowers, www.illinoiswildflowers.info/wetland/plants/sw_thistle.htm.
