Multiflora Rose: Removal and Regrowth

How to recognize multiflora rose

Multiflora rose (Rosa multiflora) is a mounded shrub built from long, arching, thorny stems. Penn State plant scientists note that a single plant can grow more than 10 feet tall and 10 feet wide. In June it carries clusters of small white to pinkish flowers with five petals and the clusters later turn into small red hips.

The leaves are compound, with seven to nine leaflets. The quickest field check is where the leaf meets the stem. On multiflora rose that leaf base is fringed, which sets it apart from most of the wild roses that grow in Pennsylvania. Near trees, the canes can climb about 20 feet into the branches, so a thicket that looks like a hedge can be hauling itself into a young tree.

It also breaks bud early in spring, so in March and April you can often pick out the thicket by its green canes while the rest of the field is still brown.

Why it matters in Chester County

Multiflora rose came from Asia and was promoted for decades as a living fence and as erosion control. Pennsylvania later put it among the first plants on its noxious weed list, and Delaware lists it among the invasive plants banned under state law. On the ground, the story is the same on most farms here: it crowds out pasture grasses, shades seedling trees, and closes up fence lines until no one can walk them.

For horse farms and estates, the problem is practical as much as ecological. Thorny canes snag people, dogs and horses, they make a fence line impossible to inspect, and a thicket at the edge of a paddock keeps expanding into the grass. Birds and browsing animals eat the hips and pass the seeds, which is how new plants show up in a clean field. Penn State reports that the seeds can stay viable in the soil for up to 20 years, so a cleared site will keep producing seedlings for a long time.

How we remove it

We cut multiflora rose with the Cat 285XE compact track loader carrying a drum mulcher. The stems are ground into a mulch layer where they stand, so there is no burn pile and no truck haul. The BRX418 brush cutter covers the places the mulcher cannot reach well, such as tight fence lines, the base of trees and the edge of a ditch. The rock grapple moves long canes and debris that should not stay where they fell.

The part to understand before you book is the root crown. Penn State states plainly that mowing alone does not control multiflora rose, and that finding every crown after mowing is almost impossible. We leave crowns in the ground, which also keeps slopes and stream-side soil stable. Those crowns are where the regrowth comes from. If an owner wants crowns dug out, that is a separate excavation scope, written up after the site walk.

Stems that touch the ground can also root where they land, a habit called layering, so we look for new crowns along the edges of the thicket rather than only at the center. If you want chemical control on cut stems, a licensed applicator does that work, and the rules for your site are confirmed before anyone applies anything.

Timing by season

The usual start is the dormant season, from late fall through winter. With the leaves down, every cane and every edge of the thicket is visible, the ground is firm. Multiflora rose breaks bud early, so a late-winter visit also lets us finish before growth starts.

Spring and early summer are the best time to walk the site for regrowth, because young shoots are soft and easy to cut. Late summer and fall are good for mapping what came back and where it is thickest. Your own site walk sets the exact calendar, and weather, ground moisture and animal turnout can move it.

Regrowth and follow-up visits

Expect new shoots from the crowns once the first growing season starts, and seedlings from seed already in the soil. That is normal, and it is why this is a plan rather than a single visit. Season 2 brings a follow-up pass that cuts the regrowth while it is young. Season 3 is a lighter pass on what remains. Whether more visits are needed is decided on the ground, with the season 1 map of patches in hand.

Penn State says significant infestations need ongoing maintenance to keep them from coming back, and that matches what the plan assumes. See the full Invasive Regrowth Plan for the season-by-season table.

What the owner can do

Between visits, keep regrowth from getting ahead of the next pass. Clear or graze where your ground and your animals allow it. Photograph or flag thick patches so the next visit goes straight to them. Watch the edges of the cleared area, where seedlings start first, and keep bare soil from sitting open for a full season. If you find a few small plants, pulling them while the soil is moist is far easier than cutting them once they have thick canes. Wear heavy gloves and eye protection, because the thorns are sharp.

For larger work, forestry mulching is the starting point, and the work area is described on our Chester County page.