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Also called the Empress tree, Paulownia is one of the most aggressive invasive trees on this list. It can grow up to 60 feet high but its height is not the only threat. By the time a tree is 8 to 10 years old, it can produce up to 20 million seeds, all of which can be dispersed via water or wind.
But, be careful to wear gloves if you plan on touching Tree of Heaven. Handling the leaves and branches of this tree can cause a skin rash due to exposure to the sap.
1. Spotted lanternfly. Spotted lanternflies (Lycorma delicatula) are native to China but have run rampant all across the northeastern U.S., prompting experts to advise people to kill them. While they are harmless to humans and animals, they are a danger to over a hundred plant species.
Out of the 13,000 alien species that have made their way around the world since colonialism began in the 15th Century, Japanese knotweed is widely regarded to be among the most intractable – smothering suburban gardens, swallowing up whole swathes of railway line, swamping canals, and creeping into national parks with ...
Once established, Kudzu plants grow rapidly, extending as much as 60 feet per season at a rate of about one foot per day.
Invasive tree lilac tolerates a range of site conditions. A popular ornamental, this species is frequently found in yards or urban areas. It can escape cultivation, invading and dominating natural areas such as riparian corridors and floodplains.
Technically, dandelions are an invasive species. However, they have been in America so long that it might not be considered invasive anymore. Dandelions were brought over from Europe to be used as medicine in the American colonies.
In Christianity and Judaism, the tree of the knowledge of good and evil (Tiberian Hebrew: עֵץ הַדַּעַת טוֹב וָרָע, romanized: ʿêṣ had-daʿaṯ ṭōḇ wā-rāʿ, [ʕesˤ hadaʕaθ tˤov wɔrɔʕ]; Latin: Lignum scientiae boni et mali) is one of two specific trees in the story of the Garden of Eden in Genesis 2–3, along with the tree of ...
The two most common herbicides used on tree- of-heaven with the foliar spray approach are glyphosate and triclopyr. These systemic herbicides are absorbed through leaves and stems and then transported to the root system.
Learn the identification characteristics of the invasive tree-of-heaven and be able to distinguish it from the native look-alikes, black walnut and staghorn sumac. Tree-of-heaven is an invasive tree species. It reproduces prolifically, making it hard to manage and control.
Silver maple tree
They might be prized for their vibrant colour in autumn, but their root systems are one of the most invasive of all. As the roots enlarge, silver maple trees have been known to crack driveways, pavements, foundations and pipes. It's best to avoid planting this tree altogether.
The rate of growth for Sequoias never slows and this is over a natural lifetime that can span thousands of years. They continue to add layers at the same rate throughout their long life so that as they grow in height and girth they incrementally layer on more wood every year.
Along highways, it often forms dense thickets in which few other tree species are present, largely due to the toxins it produces to prevent competition. The roots are poisonous to people.
While not classified as invasive, hostas occupy valuable space that could support native plants—some of which are critically threatened.
Apply an herbicide to the lilac bush and its roots. Ensure the chemical agent includes Glyphosate, which blocks an enzyme essential for plant growth. Monitor the lilac bush until it is dead, typically taking a few days. Properly dispose of the dead plant according to your local municipality's guidelines.
The climate and environment of the Southeastern United States allowed the kudzu to grow virtually unchecked. In 1953 the United States Department of Agriculture removed kudzu from a list of suggested cover plants and listed it as a weed in 1970. By 1997, the vine was placed on the "Federal Noxious Weed List".
Many species of bamboo mature in four to eight years; once plants reach maturity, they can be sustainably harvested as a perennial crop for 40+ years. Because only the aboveground parts are harvested, there is less soil disturbance, which helps maintain stability.
This species has since drastically increased in number and spread to all of New England and as far north as Newfoundland, Canada. Subsequent introductions in South America, Asia, Africa, Australia, and the west coast of North America have caused concern globally. Here in New England, green crabs have few predators.
According to tracking data from the University of Georgia, 1,695 invasive or non-native plant species have been mapped in the California (No. 1) wilderness, the most in our ranking. Florida (No. 6) follows closely with 1,509 species reported and has also been invaded by numerous animal species.