Les semis sont réalisés à l’automne ou au printemps après une stratification froide. Cette étape améliore considérablement le taux de germination et favorise une levée plus uniforme.
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Native shrub
Rosaceae
Native shrubs for hedges
Eastern Ninebark (Physocarpus opulifolius) – Seeds
Physocarpus opulifolius
Robust native shrub with pinkish white flowers, dense foliage, and peeling bark. Eastern ninebark quickly forms natural hedges while supporting pollinators, birds, and local biodiversity.
Quantity
Minimum 100 seeds
Exposure
Full sun to partial shade
Hardiness
Zones 3 to 8
Difficulty level
Low to moderate
Discover the plant
Family
Rosaceae
Genus
Physocarpus
Species
opulifolius
Cultivar
Type
Native shrub
Cycle
Perennial
Eastern Ninebark (Physocarpus opulifolius) is a robust native shrub with a naturally rounded habit, valued for dense green foliage, clusters of pinkish white flowers, and decorative peeling bark. In June and July, abundant blooms attract bees, hoverflies, butterflies, and many other beneficial insects. Inflated seed capsules later develop reddish tones before turning brown, while mature branches reveal layers of bark that peel away in thin strips. Exceptionally hardy, this deciduous shrub generally reaches 1.5 to 2.5 m and remains attractive through several seasons, providing flowers, fruiting texture, autumn colour, and distinctive winter structure.
Eastern ninebark grows in full sun or partial shade and adapts to loamy or clay-based soil that is moist to moderately dry and well drained. It tolerates a broad range of conditions after establishment but flowers most abundantly with several hours of direct sun. Regular watering during establishment encourages a vigorous root system, after which rooted plants withstand short dry periods. A layer of compost in spring is generally sufficient. Prune lightly after flowering to balance the shape, or remove old, dead, and crossing branches in spring. Avoid repeated severe pruning that removes the mature stems displaying the most attractive peeling bark.
Eastern ninebark suits informal hedges, privacy screens, native shrub borders, slopes, and naturalization projects. Its dense form provides shelter and nesting opportunities for small wildlife, while the flowers supply nectar and pollen for insects. The fruiting clusters may also interest certain birds later in the season. It pairs naturally with red-osier dogwood, bush honeysuckle, Canada serviceberry, and steeplebush. Fast growth, excellent cold hardiness, adaptable cultivation, and winter bark interest make Physocarpus opulifolius a versatile shrub for ecological landscapes, wildlife gardens, and durable plantings throughout Quebec and other cold regions of Canada.
Planting guide
From planting to establishment.
Planting depth
3 mm
Spacing / density
45 à 75 cm (18 à 30 po)
Establishment temperature
18 to 22°C
Establishment time
14 to 30 days after stratification
Best planting time
Automne ou printemps
Propagation
Stratified seed, semi-hardwood cuttings, or layering
Growing method
Semez les semences à l’automne ou au printemps après une période de stratification froide afin d’améliorer la germination. Déposez les graines à environ 3 mm de profondeur dans un substrat léger et bien drainé. Maintenez une température de 18 à 22 °C (64 à 72 °F) et une humidité constante sans excès. Cette espèce tolère une grande variété de sols mais préfère les terrains fertiles et bien drainés. Une fois établie, elle résiste bien aux conditions variables du climat québécois. Sa croissance rapide permet de former rapidement une haie ou un écran végétal naturel. Les jeunes plants bénéficient d’un paillis qui conserve l’humidité et réduit la compétition des mauvaises herbes.
Soil and care
The right conditions.
Exposure
Full sun to partial shade
Soil pH
6.0 to 7.5
Hardiness zone
Zones 3 to 8
Minimum temperature
Approximately -40°C
Watering
Regular during establishment; moderate afterward
Soil type
Loamy to clay-based, moist, well-drained soil
Fertilization
Mature compost in spring
Seasonal care
In spring, remove dead, broken, or crossing wood and apply compost over the root zone. Renew mulch without piling it against the stems. During summer, water young shrubs and established plants through prolonged drought. Prune lightly after flowering to correct the shape, avoiding removal of every older branch displaying decorative bark. Every few years, cut one or two of the oldest stems at ground level to renew the shrub gradually. In fall, leave the fruiting capsules in place to extend visual interest and provide additional seasonal value for wildlife.
Container growing
A controlled environment.
Recommended pot size
45 à 60 cm (18 à 24 po)
La culture en pot du physocarpe à feuilles d'obier est possible dans un grand contenant profond muni d’un excellent drainage. Utilisez un terreau riche en matière organique et arrosez régulièrement durant les périodes chaudes afin de maintenir une croissance vigoureuse. Cet arbuste développe rapidement un système racinaire important et apprécie un rempotage occasionnel. En pot, il constitue un excellent écran végétal pour une terrasse ou un balcon ensoleillé. Son feuillage dense et sa floraison mellifère offrent un intérêt décoratif durant une grande partie de la saison.
Bloom and dimensions
The complete profile.
Flower color
Pinkish white
Foliage color
Green; yellow to bronze in fall
Foliage type
Deciduous
Growth rate
Fast
Bloom period
June to July
Fruiting
Inflated reddish capsules maturing to brown
Maximum height
2.5 m
Maximum width
3 m
Harvest
August to October as capsules dry
Garden associations
What to plant with it.
Good companions
Red-osier dogwood, bush honeysuckle, Canada serviceberry, steeplebush
Avoid planting with
English lavender, cotton lavender, rockroses, Adam’s needle
Natural hedge, screen, shrub border, slope, naturalization
From the garden to inspiration.
Frequently asked questions
Everything toknow.
Oui, sa floraison abondante attire les abeilles, les syrphes, les papillons et plusieurs autres insectes bénéfiques. Il constitue une excellente ressource nectarifère au début de l’été.
Son port dense, sa croissance rapide et sa grande rusticité en font un excellent choix pour créer des haies brise-vue ou des aménagements naturalistes.
Cet arbuste demande peu d’entretien une fois établi. Une taille légère après la floraison et un apport de compost au printemps suffisent généralement.
Le physocarpe favorise la biodiversité, soutient les pollinisateurs et s’adapte très bien aux conditions du Québec. Son feuillage, sa floraison et son écorce exfoliante procurent un intérêt ornemental durant plusieurs saisons.
Its strengths, naturally.
Not recommended for pets
Pets
Attracts or supports pollinating insects
Pollinators
Plants that attract butterflies
Butterflies
Less attractive or generally tolerated by deer
Deer
