Photo- National Invasive Species Information Center

Where are they from?

These shrubs were introduced in 1866 from east Asia as erosion control and for ornamental value. Most people refuse or are against the removal of these plants because of their attractive flowers and perceived value to pollinators.

Why are they so harmful?

Large stands or thickets of Multiflora Rose degrade the area around them as well as reduce native plant and animal diversity. Multiflora Rose is classified as a “Class B” noxious weed by the state of Pennsylvania. This shrub has high seed production, producing close to 500,000 seeds per year. This coupled with its shade tolerance, this shrub can grow just about anywhere it can get a bit of sun.

How can I identify these Shrubs?

Use identifying apps like Seek by iNaturalist (On both Apple and Google Play stores).

When unable to use phones, remembering what the plant looks like from pictures and descriptions is best. These shrubs have stems or canes that can grow up to 15 feet, these stems are green all year round distinguishing themselves from native rose plants. Leaves are pinnately compound with 5 to 9 football shaped leaves with serrated edges. New leaf growth can appear red in color compared to green. The have flowers show from May to June and have five petals that are white or pale pink in color. Small hips replace the flowers from July to winter and are a dark red.

Where can I learn more?

Information Page by PSU Extension-- https://extension.psu.edu/multiflora-rose

Accurate Identification by PSU Extension-- https://www.youtube.com/watch?v=IjAxC5iKayo