Ninebark
Physocarpus opulifolius
Diabolo
About this plant
Physocarpus opulifolius, commonly called Ninebark, is a deciduous shrub known for its attractive, peeling bark and colorful foliage that can range from green to deep purple. It produces clusters of small white or pinkish flowers in late spring to early summer, which attract pollinators. The shrub is often used in landscaping for hedges, borders, or naturalized areas due to its hardiness and ornamental appeal.
Taxonomy
- Genus
- Physocarpus
- Family
- Rosaceae
- Higher classification
- Order Rosales
- Plant type
- Shrub
- Lifespan
- Perennial
Origin & Distribution
- Native region
- Eastern and Central North America
- Distribution
- Native to eastern and central North America; widely cultivated in temperate regions worldwide.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, West-facing, East-facing
- Watering frequency
- Moderate
- Watering interval
- 5–10 days
- Humidity
- Normal
- Minimum
- -40 °C
- Maximum
- 35 °C
- Optimal
- 15-25 °C
- USDA hardiness zones
- 2-7
- Soil pH
- 6.0-7.5 (slightly acidic to neutral)
- Soil type
- well-draining loam or sandy soil
Watering. Water regularly during the first growing season to establish roots. Once established, it is drought tolerant and only needs watering during prolonged dry periods.
Fertilizing. Apply a balanced, slow-release fertilizer in early spring to support healthy growth. Avoid over-fertilizing, which can lead to excessive leafy growth and fewer flowers.
Physocarpus opulifolius is a tough shrub that grows well in many conditions. It prefers full sun but can tolerate some shade. It needs well-draining soil and does not like to be overwatered. Regular pruning helps keep it healthy and looking good, but it generally requires low maintenance.
Propagation
- Propagation methods
- Cuttings, Division, Seeds
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- late spring to early summer
Peeling bark, colorful foliage, clusters of small white or pink flowers, and attractive seed pods.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Not considered a weed
Non-toxic to humans and pets, making it safe for gardens with children and animals.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen, Skin contact
- Pollen level
- Moderate
Physocarpus opulifolius may cause mild allergic reactions in sensitive individuals, mainly due to its pollen. People who are allergic to pollen should avoid close contact during its flowering period. Wearing gloves when handling the plant can help reduce skin irritation.
Common problems
If overwatered, the plant may develop root rot. Poor air circulation can lead to fungal diseases. It may also suffer from occasional aphid infestations.
Uses
Used mainly as an ornamental shrub in gardens and landscapes for its attractive bark and foliage. It can also serve as a natural privacy screen or hedge.
Notes
Prune after flowering to maintain shape and encourage new growth. It is best to remove old stems to promote healthy bark development. The shrub is quite hardy but benefits from good air circulation to prevent fungal issues.