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Description
Helianthus Gracilentus, also known as the Slender Sunflower, is a perennial plant that belongs to the Asteraceae family. This plant is native to the central United States and is commonly found in prairies, meadows, and along roadsides. It is well-known for its beautiful yellow flowers that bloom in late summer and early fall.
Taxonomic Information
| Domain | Eukaryota |
|---|---|
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Asterales |
| Family | Asteraceae |
| Genus | Helianthus |
Appearance
The Slender Sunflower can grow up to 7 feet tall and 3 feet wide. It has a single, erect stem and large leaves that are dark green and lance-shaped. The flowers are bright yellow, about 2-3 inches in diameter, and have a brown center. The flowers bloom in late summer and early fall and attract bees, butterflies, and other pollinators.
Care Guide
Water: The Slender Sunflower requires moderate watering. Water the plant deeply once a week, especially during hot and dry periods.
Fertilization: Fertilize the plant with a balanced fertilizer once in the spring and again in midsummer.
Soil: The plant prefers well-draining soil that is rich in organic matter. It can tolerate slightly acidic to slightly alkaline soil.
Sunlight: The Slender Sunflower prefers full sun and can tolerate some shade.
Hardiness Zones: The plant can grow in hardiness zones 4-9.
Common Pests & Diseases
The Slender Sunflower is generally resistant to pests and diseases. However, it can be susceptible to powdery mildew, rust, and leaf spot. Insects such as aphids, caterpillars, and slugs may also attack the plant. To prevent these problems, ensure good air circulation around the plant, water the plant at the base, and remove any infected or damaged leaves.
Habitat
The Slender Sunflower is native to the central United States and is commonly found in prairies, meadows, and along roadsides. It prefers well-draining soil and can tolerate both drought and flooding. The plant is an important food source for birds, especially during the winter months.
Question and Answer
Q: How often should I water the Slender Sunflower?
A: Water the plant deeply once a week, especially during hot and dry periods.
Q: What is the ideal soil type for the Slender Sunflower?
A: The plant prefers well-draining soil that is rich in organic matter. It can tolerate slightly acidic to slightly alkaline soil.
Q: What pests and diseases should I watch out for?
A: The plant can be susceptible to powdery mildew, rust, and leaf spot. Insects such as aphids, caterpillars, and slugs may also attack the plant.
Q: What is the hardiness zone for the Slender Sunflower?
A: The plant can grow in hardiness zones 4-9.
Related Plants
- Helianthus annuus (Common Sunflower)
- Helianthus petiolaris (Prairie Sunflower)
- Helianthus maximiliani (Maximilian’s Sunflower)
- Helianthus decapetalus (Thinleaf Sunflower)
References
- Missouri Botanical Garden: Helianthus gracilentus
- University of Illinois Extension: Slender Sunflower
- USDA Plants Database: Helianthus gracilentus
