Physocarpus bracteatus

Physocarpus opulifolius

Native to:: Canada

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Taxonomy

Division:: Magnoliophyta | - Flowering plants
Family:: Rosaceae
Genus:: Physocarpus
Species:: Physocarpus opulifolius
USDA Symbol:: PHBR14

Growth Characteristics

Height:: 300 cm
Light Requirements:: Full Sun,Part Shade,Shade
Drought Tolerance:: Medium
Bloom Months:: may,jun
Bloom Colors:: white, pink
Landscaping Shrub:: Yes

Keystone Species Ranking

Caterpillar Keystone:: ★★★☆☆ Butterfly & moth species supported by this genus (NWF)

Host Plant for Caterpillars

Aethes sp., Ancylis spiraeifoliana, birch leaffolder (Ancylis discigerana), Blinded Sphinx (Paonias excaecata), bluish spring moth (Lomographa semiclarata), Cecropia moth (Hyalophora cecropia), common eupithecia (Eupithecia miserulata), Dimorphic eulithis (Eulithis molliculata), Dogwood borer (Synanthedon scitula), Eupithecia palpata, Eupsilia sp., Glorious Habrosyne (Habrosyne gloriosa), Gypsy moth (Lymantria dispar), Hemina Pinion (Lithophane hemina?), Herpetogramma abdominalis, hibiscus Quaker (Orthosia hibisci), Hitched Arch (Melanchra adjuncta), Io moth (Automeris io), Itame abruptata, Linden looper (Erannis tiliaria), Lithophane oriunda, Morrison's sallow (Eupsilia morrisoni), Morrisonia evicta, Obliquebanded leafroller (Choristoneura rosaceana), One-spotted variant moth (Hypagyrtis unipunctata), Prochoerodes transversata, purplish leafroller moth (Olethreutes permundana), signate melanolophia moth (Melanolophia signataria), spiny looper moth (Phigalia titea), Stigmella corylifoliella, Unicorn caterpillar moth (Schizura unicornis), white spring moth (Lomographa vestaliata), woolly gray (Lycia ursaria), Xylena curvimacula

Garden & Ecology Notes

Wildlife Value:: birds, bees, butterflies
Deer Resistant:: Yes
Fall Color:: yellow
Fire Ecology:: Fire adapted — tolerates or benefits from fire
Fire Notes:: Resprouts vigorously from the root crown after fire or cutting. Often used in restoration of fire-prone riparian areas.

Propagation & Germination

Stratification:: Cold/moist stratification required — 30–60 days
Germination Time:: 14–30 days
Notes:: Seeds germinate best with cold stratification. Can also be propagated easily from softwood cuttings.

The above propagation data sourced from Claude AI

ORGHPS Germination Guide: Expose to fluctuating outdoor winter temps incl. freezing for 3 months. Increase light/temp in spring.

Source: Ontario Rock Garden & Hardy Plant Society