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Description
Physocarpus Capitatus, also known as Pacific ninebark, is a deciduous shrub that is native to North America, particularly the Pacific Northwest. It belongs to the Rosaceae family and is characterized by its unique bark that peels in layers, revealing different shades of reddish-brown. The shrub typically grows up to 10 feet tall and 10 feet wide, with a rounded shape and arching branches.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Rosales |
| Family | Rosaceae |
| Genus | Physocarpus |
Appearance
Physocarpus Capitatus has a unique appearance that sets it apart from other shrubs. Its leaves are oval and serrated, with a bright green color that turns yellow in the fall. The shrub produces small, white or pinkish flowers in clusters that bloom in late spring or early summer. The fruit that follows is a small, red or brown capsule that contains many seeds. The most striking feature of this shrub, however, is its bark, which peels in thin layers to reveal a range of colors from reddish-brown to light green.
Care Guide
Physocarpus Capitatus is a relatively easy shrub to care for, as long as its basic needs are met. The following are some care tips to keep in mind:
- Water: Water the shrub regularly, especially during hot and dry periods. Avoid overwatering, as this can lead to root rot.
- Fertilization: Fertilize the shrub once a year in the spring with a slow-release fertilizer.
- Soil: Plant Physocarpus Capitatus in well-draining soil that is rich in organic matter.
- Sunlight: This shrub prefers full sun to partial shade.
- Hardiness Zones: Physocarpus Capitatus is hardy in USDA zones 5 to 9.
Common Pests & Diseases
While Physocarpus Capitatus is generally a healthy shrub, it may be susceptible to certain pests and diseases. The following are some common issues to look out for:
- Aphids: These small insects can be found on the leaves of the shrub and can cause stunted growth and yellowing leaves.
- Spider mites: These tiny insects can cause yellow or brown spots on the leaves and may spin webs on the shrub.
- Powdery mildew: This fungal disease can cause a white or grayish coating on the leaves and stems of the shrub.
Habitat
Physocarpus Capitatus is native to the Pacific Northwest region of North America, where it can be found in wetlands, forests, and along streams and rivers. The shrub prefers moist, well-draining soil and can tolerate some shade. It is often used in landscaping as an ornamental shrub due to its unique bark and attractive flowers.
Question and Answer
Q: Can Physocarpus Capitatus be grown in containers?
A: While it is possible to grow this shrub in containers, it may not do as well as it would in the ground. The shrub has a deep root system and needs plenty of space to grow.
Q: How often should Physocarpus Capitatus be pruned?
A: Pruning should be done in late winter or early spring before new growth begins. The shrub can be pruned to maintain its shape or to remove dead or diseased branches.
Q: Is Physocarpus Capitatus deer-resistant?
A: While this shrub is not completely deer-resistant, its thick and coarse leaves can make it less appealing to deer than other plants.
Q: How long does it take for Physocarpus Capitatus to grow?
A: The shrub can grow up to 2 feet per year under ideal conditions, but growth rates may vary depending on the location and care of the plant.
Related Plants
- Physocarpus opulifolius
- Physocarpus monogynus
- Physocarpus malvaceus
References
- “Physocarpus capitatus.” Pacific Northwest Wildflowers. n.d. https://www.pnwflowers.com/flower/physocarpus-capitatus
- “Pacific ninebark.” Fine Gardening. n.d. https://www.finegardening.com/plant/pacific-ninebark-physocarpus-capitatus
- “Pacific Ninebark.” Oregon State University. n.d. https://landscapeplants.oregonstate.edu/plants/physocarpus-capitatus
