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Managing Invasive Trees & Vegetation of the United States

Posted by Matt Nelson on 12/22/21 10:00 AM
Matt Nelson

Invasive Tree Problem

When introduced beyond their natural geography, many species of trees and vegetation can infest and degrade land while harming native ecosystems. They have the potential to overtake fields and forests, or even the resources native grasses and vegetation need to live, which results in killing off valuable grazing and production land.

Stringent control and eradication measures are often necessary to minimize the spread of invasive trees and prevent damage to the environment. Fortunately, there are a variety of options for removing these tenacious intruders from your property.



Before we dive into the “how” of invasive tree and vegetation management, let’s first review commonly found invasive tree species by region:


Invasive Sumac trees can be found across much of the U.S., but they pose the biggest threat in the northeast and midwestern states like Ohio and Michigan. Sumac trees grow quickly, aggressively, and in dense thickets. If left unchecked, invasive sumac trees can outgrow and displace native vegetation by cutting off access to nutrients and force out wildlife by consuming their natural habitat and/or the vegetation they depend on for survival. Due to their dense foliage, Sumac trees also block rain and sunlight, which brings unwanted changes to the ecosystem’s soil chemistry, temperature, and levels of natural sunlight.


Invasive tree species across the southeastern region of the country include the Brazilian Pepper Tree, Chinese Tallow, Privet, and Saw Palmetto. For reasons that include toxicity, deposition, and invasive root systems, these trees can rapidly overtake natural habitats and reduce the profitability and usability of production land if left unattended. Separately, invasive Kudzu trees cover an area that stretches from Texas to New York. While ideal for shading porches, feeding livestock, and helping to control erosion, Kudzu trees grow quickly and produce vines that cover and kill native plants, envelop trees, snap branches, and climb buildings and powerlines. Before germinating, they can withstand drought, frost, and fire damage and remain dormant for several years. Therefore, it is crucial to conduct annual maintenance and kill every Kudzu root crown, which can take several years.



The Boxelder is a species of maple with brittle wood and a fast growth system that thrives in wet bottomlands common in the Midwest. While these trees help stabilize stream banks and shelter wildlife, they are considered a weed in many urban areas. Their weak wood causes them to split or drop their limbs in relatively light wind conditions, making them a landscape maintenance nightmare. The Boxelder’s rapid spread can be attributed to how quickly it germinates after dropping its seeds – winged papery fruits that spin through the air and travel great distances away from the parent tree.

Central U.S.

Native to Kansas and originally limited to rocky bluffs, the Eastern Red-Cedar began terrorizing the “central” portion of the U.S. from South Dakota down to Oklahoma and parts of Texas when new land management practices led to a decrease in controlled fires, allowing forests to spread. Because they grow year-round in temperatures above 40 degrees and in a variety of precipitation conditions, these trees damage the surrounding grasslands by intercepting 25%-60% of rainfall thanks to their dense canopies, consuming anywhere from six to 16 gallons of water each day, and fueling wildfires because of their flammable foliage, thin bark, and propensity for containing oils.


While technically not a tree, invasive Scotch Broom is a nuisance in the Pacific Northwest, particularly along the sides of highways. This thick, bushy shrub thrives on sandy, disturbed soil and quickly establishes deep, woody roots. It adds massive amounts of nitrogen to the soil, which negatively impacts and changes plant communities. It also produces many seeds, which can last in the soil for up to half a century.

Scotch Broom



In many cases, invasive tree species can be eliminated by using chemicals or controlled fires. However, the most effective way for managing overgrowth is through mechanical control, which can be accomplished with the use of skid-steer attachments and a three-step process:

1. Brush Cutting
The first step in managing invasive species is getting to the source. This typically involves cutting back branches and brush in order to access the tree’s trunk and roots. The best tool for this job is a brush cutter. This versatile, high-performance skid-steer attachment excels at processing material such as thick grass, brush, and branches.

Diamond Mowers offers a brush cutter option – the Brush Cutter ProX. This attachment features four hydraulic motors for optimal blade performance and safe handling with strategic engineering for different types of land and applications.

    • Brush Cutter ProX: Available in 60”, 72”, and 84” cutting widths; features three steel blades with a tri-hex cutting disc that can slice through material up to 10” in diameter.

brush cutter

2. Mulching
Mulching is the process of grinding trees and brush down into finer material for quick decomposition. For this step, either a disc mulcher or drum mulcher is recommended. Selecting the right attachment for this job is as simple as assessing the size of the trees:

    • Forestry Disc Mulcher: Cuts trees and brush up to 14” in diameter and mulches the same vegetation up to 6” in diameter.
    • Drum Mulcher: Mulches trees and brush up to 9” in diameter.

drum mulcher

3. Stump Grinding
To prevent tress from re-sprouting, you’ll need a stump grinder. This process is typically done after trees have been cut or mulched. Diamond Mowers offers two types of stump grinders designed to grind stumps of virtually any size to below ground level thanks to their 1”-thick heavy-duty wheels equipped with carbide teeth that smoothly slice through tough material and resist impact and abrasion.

    • Miller: Available in a 26” cutting width and compatible with high-flow hydraulic machines.
    • Reflex: Available in 24” and 26” cutting widths and configures with both low and high-flow hydraulic machines.

stump grinder

You don’t necessarily need all three attachments to complete this process. A mulcher may be sufficient for Steps 1 and 2, depending on the size of the area and the material being cleared.

If you have questions about invasive trees and plants on your property, consult an arborist or landscaping professional. If you’re ready to take action, Diamond Mowers offers a wide variety of attachments to effectively manage invasive species.

Contact Your Local Diamond Mowers Dealer Today

Diamond Mowers offers a wide range of specialized attachments compatible with most tractor, skid-steer, wheel loader and excavator brands to tackle invasive trees and vegetation overgrowth. For more information, visit us online or find a dealer near you.

Topics: Skid-Steers & Attachments, Invasive Trees/Plants, Application: Forestry, Application: Mulching, Application: Conservation Management