Contents
Description
Oemleria cerasiformis, also known as Osoberry, Indian Plum, or Pacific Plum, is a deciduous shrub native to western North America. This plant belongs to the Rosaceae family and produces fragrant, small white flowers in early spring, followed by edible fruit that resembles a plum. The fruit is an important food source for many wildlife species, including birds, bears, and deer.
Taxonomic Information
| Domain | Eukaryota |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Magnoliopsida |
| Order | Rosales |
| Family | Rosaceae |
| Genus | Oemleria |
Appearance
The Osoberry shrub can grow up to 20 feet tall and wide, but typically reaches around 10 feet. The leaves are oval-shaped, dark green, and have a glossy appearance. In fall, the leaves turn yellow and red before falling off. The flowers are small, white, and have a sweet fragrance that attracts pollinators such as bees and butterflies. The fruit is a round drupe that is green when young and turns red-purple when mature.
Care Guide
Osoberry is a low-maintenance plant that is easy to care for. Here are some tips:
- Water: Water regularly during the growing season, but avoid overwatering. Osoberry can tolerate drought once established.
- Fertilization: Fertilize lightly in early spring with a balanced fertilizer.
- Soil: Osoberry prefers well-draining, loamy soil. Amend heavy clay soil with organic matter to improve drainage.
- Sunlight: Osoberry prefers partial shade but can tolerate full sun in cooler climates.
- Hardiness Zones: Osoberry is hardy in USDA zones 5-9.
Common Pests & Diseases
Osoberry is generally free of serious pests and diseases. However, it may be susceptible to the following:
- Aphids: These small insects feed on the leaves and can cause curling and distortion. Use insecticidal soap to control them.
- Powdery mildew: This fungal disease appears as a white, powdery coating on the leaves. Improve air circulation and avoid overhead watering to prevent it.
- Fire blight: This bacterial disease causes wilted, blackened leaves and shoots. Prune infected branches and sterilize pruning tools to prevent its spread.
Habitat
Osoberry is found in a variety of habitats, including woodlands, meadows, and stream banks. It prefers moist, well-drained soils and can tolerate both sun and shade. This plant is commonly found in the western United States and Canada.
Question and Answer
Q: Is Osoberry an invasive species?
A: No, Osoberry is not considered an invasive species. It is a native plant that provides important habitat and food for wildlife.
Q: Can Osoberry be grown in containers?
A: Yes, Osoberry can be grown in containers, but it may not reach its full size potential.
Q: How often should I prune Osoberry?
A: Prune Osoberry in late winter or early spring before new growth appears. Remove dead, damaged, or crossing branches, and shape the shrub as desired.
Q: Can Osoberry fruit be eaten by humans?
A: Yes, Osoberry fruit is edible and has a sweet, juicy flavor. However, the fruit is small and may not be as palatable as cultivated fruit species.
Related Plants
- Prunus serotina (Black cherry)
- Prunus virginiana (Chokecherry)
- Prunus emarginata (Bitter cherry)
- Prunus subcordata (Klamath plum)
References
- Arno, S. F., & Hammerly, R. P. (2007). Northwest Trees: Identifying and Understanding the Region’s Native Trees. Mountaineers Books.
- Dirr, M. A. (2011). Dirr’s Encyclopedia of Trees and Shrubs. Timber Press.
- USDA Plants Database. (n.d.). Oemleria cerasiformis. Retrieved from https://plants.usda.gov/home/plantProfile?symbol=OEMLE
