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Description
Cortaderia, also known as Pampas Grass, is a genus of flowering plants in the Poaceae family. Native to South America, this ornamental grass is widely cultivated throughout the world for its large, feathery plumes and attractive foliage. Cortaderia is a popular choice for landscaping and garden design due to its striking appearance and versatility, as it can be used as a specimen plant, border, or screen.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Liliopsida |
| Order | Poales |
| Family | Poaceae |
| Genus | Cortaderia |
Appearance
Cortaderia produces large clumps of long, narrow, green leaves that can reach up to 6 feet in height. In late summer or early fall, tall stalks emerge from the center of the clump, bearing large plumes of feathery, creamy-white or pinkish flowers that can reach up to 12 feet in height. The plumes persist throughout the winter, adding beauty and interest to the landscape.
Care Guide
Cortaderia is a relatively low-maintenance plant, but it does require some care to thrive:
- Water: Cortaderia prefers moist, well-draining soil. Water regularly during the growing season, but avoid overwatering.
- Fertilization: Fertilize Cortaderia in early spring with a balanced, slow-release fertilizer.
- Soil: Cortaderia prefers fertile, well-draining soil. Amend heavy clay soil with organic matter to improve drainage.
- Sunlight: Cortaderia prefers full sun but can tolerate some shade.
- Hardiness Zones: Cortaderia is hardy in USDA zones 7-11.
Common Pests & Diseases
Cortaderia is relatively resistant to pests and diseases, but it can be susceptible to:
- Spider mites: These tiny pests can cause yellowing and stippling of the leaves. Treat with insecticidal soap or neem oil.
- Leaf spot: This fungal disease causes small, dark spots on the leaves. Remove infected leaves and treat with a fungicide.
- Rust: This fungal disease causes orange or yellow spots on the leaves. Remove infected leaves and treat with a fungicide.
Habitat
Cortaderia is native to South America but has been naturalized in many other parts of the world, including North America, Europe, and Asia. It grows in a variety of habitats, including grasslands, woodlands, and wetlands.
Question and Answer
Q: Is Cortaderia invasive?
A: Yes, Cortaderia can be invasive in some areas, particularly in coastal regions with mild winters. Check with your local extension office before planting.
Q: Can I divide Cortaderia?
A: Yes, Cortaderia can be divided in spring or fall. Use a sharp spade to cut through the clump and replant the divisions immediately.
Q: How do I prune Cortaderia?
A: Prune Cortaderia in late winter or early spring before new growth begins. Cut the entire plant back to within 6 inches of the ground.
Q: How tall does Cortaderia get?
A: Cortaderia can reach up to 12 feet in height, including the plumes.
Related Plants
- Chasmanthium latifolium (Northern Sea Oats)
- Miscanthus sinensis (Maiden Grass)
- Panicum virgatum (Switchgrass)
References
- “Cortaderia.” Missouri Botanical Garden. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=282309
- “Cortaderia selloana.” University of Florida IFAS Extension. https://edis.ifas.ufl.edu/fp183
- “Pampas Grass (Cortaderia selloana).” Plant Conservation Alliance’s Alien Plant Working Group. https://www.nps.gov/plants/alien/fact/cose1.htm
