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Multiflora rose (Rosa multiflora)
Thorny, thicket-forming shrub with wide, arching or climbing canes and stiff, curved thorns. Can reach 10-15’ tall and 9-13’ wide. Typically more spreading than erect.
Multiflora rose is Restricted (Orange counties)
Other names for this plant include:
- Common names: Japanese rose, many-flowered rose
- Scientific names: R. cathayensis; R. multiflora var. carnea
- Multiflora rose invades open woodlands, forest edges, old fields, roadsides, savannas, and prairies. It can tolerate a wide range of soil and environmental conditions and full or partial sun. It does best on well-drained soils.
- It is extremely prolific and can form impenetrable thickets that exclude native plants species.
- Introduced from Japan in 1886 as rootstock for cultivated roses, it has been planted widely to curb soil erosion, as a living fence, and as a source of food and cover for wildlife.
- Produces up to 500,000 seeds per year. Seeds remain viable in the soil for 10 to 20 years.
Classification in Wisconsin: Restricted
Species Assessment Groups (SAG) were assembled to recommend a legal classification for each species considered for NR 40. The recommendation for multiflora rose was based upon this literature review developed by the department.
Leaves: Alternate, pinnately compound with 5-11 small (0.5-1”) sharply-toothed oval leaflets, nearly smooth on upper surface and paler with short hairs on underside. Pair of fringed stipules (a leaf-like structure) at the base of each leaf.
Flowers: Abundant, showy, fragrant, and white to slightly pink, Flowers are ½ -1 ½” wide and form a panicle (a pyramidal, loosely branched flower cluster). Blooms mid- to late spring.
Fruits & seeds: Clusters of small (0.25” in diameter), hard, bright red fruits, or rose hips, develop in summer, become brownish-red at maturity, and remain on plant through winter. Dispersed by birds and mammals.
Roots: Stolons (horizontal stems) can root at the nodes; arching stems are capable of rooting at their tips.
Similar species: Native roses are distinguished by stipules with entire margins and slender, straight thorns. Most native roses also have pink flowers.
Counties in WI where multiflora rose has been reported (as of July 2011). Both vouchered and unvouchered reports included.
Do you have multiflora rose in your county but it isn't shaded on the map? Send us a report.
Mechanical: Pull or dig up small plants. Larger plants can be pulled with a chain, tractor or bulldozer. Be sure all roots are removed since new plants can develop from root fragments. Mow 3 to 6 times during the growing season for 2 to 4 years. Early spring burns can be effective in fire adapted communities, but areas must be monitored for seedlings and resprouts.
Chemical: Cut stump treatment with glyphosate. Basal bark treatment with triclopyr ester. Treat foliage of budding or flowering plants with glyphosate or metsulfuron methyl plus a surfactant. To prevent bud development the following year, treat foliage with fosamine and water solution in late summer.
Biological: Several biocontrol agents show potential: a native viral pathogen (rose rosette disease), which is spread by an eriophyid mite (P. fructiphilus); a seed-infesting wasp (M. aculeatus var. nigroflavus); and a stem girdler (Agrilus aurichalceus) (Amrine 2003).
For more information on control techniques, visit the Multiflora rose factsheet by University of Wisconsin-Extension.
View multiflora rose pictures in our photo gallery!
Sources for content:
- Czarapata, Elizabeth; Invasive Plants of the Upper Midwest: an illustrated guide to their identification and control. University of Wisconsin Press. 2005. Pg. 43-44
- Amrine, J.W. Jr. Multiflora rose. In: Van Driesche, R., et al., 2002, Biological Control of Invasive Plants in the Eastern United States, USDA Forest Service Publication FHTET-2002-04, 413 p. Last updated Nov. 5, 2003.
- Plant Conservation Alliance’s Alien Plant Working Group: Least Wanted. Multiflora rose. Last updated Feb. 12, 2009.
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