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Description
Philadelphus Lewisii, commonly known as Lewis’ mock orange, is a deciduous shrub native to western North America. It belongs to the Hydrangeaceae family and is named after Meriwether Lewis, who discovered it during the Lewis and Clark expedition in 1806. This shrub can grow up to 10 feet tall and 6 feet wide, with an upright and spreading habit. It produces fragrant white flowers in late spring to early summer, which are attractive to bees and butterflies. The leaves are dark green and glossy, turning yellow in the fall.
Taxonomic Information
Domain | Eukaryota |
Kingdom | Plantae |
Phylum | Spermatophyta |
Class | Magnoliopsida |
Order | Cornales |
Family | Hydrangeaceae |
Genus | Philadelphus |
Appearance
The Philadelphus Lewisii shrub has an upright and spreading habit, with arching branches. It can grow up to 10 feet tall and 6 feet wide. The leaves are dark green and glossy, ovate to elliptic in shape, and measure about 1 to 4 inches long. They turn yellow in the fall, providing a colorful display. The fragrant white flowers are produced in clusters of 3 to 7, and each flower has 4 petals. They bloom in late spring to early summer, attracting bees and butterflies. The fruit is a dry capsule, containing numerous small seeds.
Care Guide
Philadelphus Lewisii is a low-maintenance shrub that is easy to care for. Here are some tips:
- Water: Water regularly during the first growing season to establish a deep root system. Afterward, water only when the top 1 to 2 inches of soil are dry.
- Fertilization: Fertilize in early spring with a balanced fertilizer, following the package instructions.
- Soil: Plant in well-drained soil, rich in organic matter. It prefers slightly acidic to neutral soil pH.
- Sunlight: Plant in full sun to partial shade. It can tolerate some shade, but it will produce fewer flowers.
- Hardiness Zones: Philadelphus Lewisii is hardy in USDA zones 4 to 9.
Common Pests & Diseases
Philadelphus Lewisii is relatively resistant to pests and diseases. However, it can be affected by the following:
- Aphids: These small insects feed on the sap of the plant, causing curling and distortion of the leaves. They can be controlled with insecticidal soap or neem oil.
- Spider mites: These tiny pests can cause yellowing and stippling of the leaves. They can be controlled with insecticidal soap or neem oil.
- Powdery mildew: This fungal disease causes a white powdery coating on the leaves, affecting their photosynthesis. It can be controlled with fungicides or by improving air circulation around the plant.
Habitat
Philadelphus Lewisii is native to western North America, from British Columbia to California and Idaho. It grows in a variety of habitats, including forests, meadows, and streambanks. It prefers well-drained soil and can tolerate some drought. It is often used in landscaping for its fragrant flowers and attractive foliage.
Question and Answer
Q: Can Philadelphus Lewisii be grown in containers?
A: It is possible to grow Philadelphus Lewisii in containers, but it may not reach its full size and potential. Make sure the container is large enough to accommodate the root system and use a well-draining soil mix. Water regularly and fertilize as needed.
Q: How often should I prune Philadelphus Lewisii?
A: Prune Philadelphus Lewisii after flowering, cutting back up to one-third of the old wood. This will encourage new growth and maintain the shape of the shrub.
Q: How long do the flowers of Philadelphus Lewisii last?
A: The flowers of Philadelphus Lewisii last for about 2 to 3 weeks, depending on the weather conditions.
Q: Does Philadelphus Lewisii attract wildlife?
A: Yes, Philadelphus Lewisii attracts bees and butterflies with its fragrant flowers.
Related Plants
- Philadelphus coronarius (Sweet mock orange)
- Philadelphus pubescens (Downy mock orange)
- Philadelphus microphyllus (Littleleaf mock orange)
- Philadelphus mexicanus (Mexican mock orange)
References
- “Philadelphus Lewisii.” Missouri Botanical Garden, www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c531.
- “Philadelphus Lewisii.” Plant Database, Dave’s Garden, www.davesgarden.com/guides/pf/go/551/.
- “Lewis’ Mock Orange – Philadelphus Lewisii.” NatureGate, www.luontoportti.com/suomi/en/puut/lewis-mock-orange.