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Description
Rudbeckia Maxima, also known as Giant Coneflower or Cabbage-leaf Coneflower, is a herbaceous perennial plant that belongs to the Asteraceae family. This plant is native to the southeastern United States and can grow up to 9 feet tall with a spread of 3-5 feet. Rudbeckia Maxima is known for its unique appearance, attractive foliage, and large yellow flowers that bloom in mid to late summer.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Rudbeckia |
Appearance
Rudbeckia Maxima has large, cabbage-like leaves that can grow up to 24 inches long and 12 inches wide. The leaves are blue-green and have a slightly hairy texture. The plant produces tall, sturdy stems that can reach up to 9 feet in height. The stems are topped with large, daisy-like flowers that are bright yellow with a dark brown center. The flowers can grow up to 5 inches in diameter and bloom from mid to late summer.
Care Guide
Rudbeckia Maxima is a low-maintenance plant that is easy to care for. Here are some tips on how to care for this plant:
Water: Water the plant regularly during the growing season. The soil should be moist but not waterlogged. Reduce watering in the fall and winter.
Fertilization: Fertilize the plant in the spring with a balanced fertilizer. Repeat every six weeks until mid-summer.
Soil: Rudbeckia Maxima prefers well-draining soil that is rich in organic matter. It can tolerate a wide range of soil types but prefers slightly acidic to neutral soil.
Sunlight: This plant prefers full sun but can tolerate some shade. It will produce fewer flowers if grown in shade.
Hardiness Zones: Rudbeckia Maxima is hardy in USDA zones 4-9.
Common Pests & Diseases
Rudbeckia Maxima is generally resistant to pests and diseases. However, it can be affected by powdery mildew, rust, and spider mites. To prevent these problems, make sure the plant has good air circulation and avoid overhead watering. Use a fungicide or insecticide if necessary.
Habitat
Rudbeckia Maxima is native to the southeastern United States and can be found in wet meadows, stream banks, and open woodlands. It prefers moist soil and can tolerate some flooding.
Question and Answer
Q: How tall can Rudbeckia Maxima grow?
A: Rudbeckia Maxima can grow up to 9 feet tall.Q: Does Rudbeckia Maxima prefer full sun or shade?
A: This plant prefers full sun but can tolerate some shade.Q: What is the blooming period of Rudbeckia Maxima?
A: Rudbeckia Maxima blooms from mid to late summer.Q: What is the hardiness zone of Rudbeckia Maxima?
A: Rudbeckia Maxima is hardy in USDA zones 4-9.
Related Plants
Here are some related plants to Rudbeckia Maxima:
- Rudbeckia hirta
- Rudbeckia fulgida
- Rudbeckia laciniata
- Rudbeckia triloba
References
– Missouri Botanical Garden. (n.d.). Rudbeckia maxima. Retrieved from https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=b626- North Carolina State University. (n.d.). Rudbeckia maxima. Retrieved from https://plants.ces.ncsu.edu/plants/rudbeckia-maxima/- The Ohio State University. (n.d.). Rudbeckia maxima. Retrieved from https://www.oardc.ohio-state.edu/newcrop/herbhunters/rudbeckia.html
