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Description
Phlox Amplifolia, commonly known as the largeleaf phlox, is a herbaceous perennial plant that belongs to the Polemoniaceae family. It is native to eastern North America and can be found in moist forests, meadows, and along stream banks. The plant blooms in early to mid-summer, with flowers ranging from pink to purple and white.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Tracheophyta |
| Class | Magnoliopsida |
| Order | Ericales |
| Family | Polemoniaceae |
| Genus | Phlox |
Appearance
Phlox Amplifolia can grow up to 3 feet tall and 2 feet wide. The plant has lance-shaped leaves that can grow up to 6 inches long and 3 inches wide. The flowers are typically 1 inch in diameter and have five petals. They grow in clusters and create a dense, showy display. The flowers have a sweet fragrance and attract butterflies and hummingbirds.
Care Guide
Phlox Amplifolia requires regular watering, especially during dry spells. It prefers well-drained soil that is rich in organic matter. The plant needs full sun to partial shade and is hardy in USDA zones 4-8. Fertilize the plant once a year in the spring with a balanced fertilizer. Deadheading spent blooms will encourage the plant to produce more flowers.
Common Pests & Diseases
Phlox Amplifolia is susceptible to powdery mildew, which is a fungal disease that causes a white or gray powder to form on the leaves and stems. Spider mites and thrips can also be a problem. To prevent these pests, keep the plant healthy and watered regularly. If pest problems persist, use an insecticidal soap or neem oil spray.
Habitat
Phlox Amplifolia is native to eastern North America and can be found in moist forests, meadows, and along stream banks. It grows well in areas with full sun to partial shade and well-drained soil. The plant is an important source of nectar for butterflies and hummingbirds.
Question and Answer
Q: Is Phlox Amplifolia deer-resistant?
A: No, Phlox Amplifolia is not deer-resistant. Deer may eat the plant or use it as a rubbing post.
Q: Can I grow Phlox Amplifolia in a container?
A: Yes, Phlox Amplifolia can be grown in a container, but it will require regular watering and fertilization.
Q: How do I propagate Phlox Amplifolia?
A: Phlox Amplifolia can be propagated by division in the spring or fall. Dig up the plant and separate the roots into smaller clumps. Plant the divisions in well-drained soil and water regularly.
Q: When should I prune Phlox Amplifolia?
A: Prune Phlox Amplifolia in the fall after the plant has finished blooming. Cut back the stems to about 6 inches above the ground.
Related Plants
- Phlox Paniculata
- Phlox Drummondii
- Phlox Maculata
- Phlox Bifida
References
- “Phlox amplifolia.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?taxonid=280294.
- “Phlox amplifolia.” NC State Extension, 5 Apr. 2018, content.ces.ncsu.edu/phlox-amplifolia.
- “Phlox amplifolia.” The Spruce, 2 Jan. 2021, www.thespruce.com/phlox-amplifolia-plant-profile-4842224.
