How Do I Kill Tree of Heaven Plants?

Tree of heaven plants, also known as Ailanthus altissima, are fast-growing, invasive trees that can quickly take over a yard or garden. They are tough and adaptable, able to grow in a range of conditions and spread rapidly by seed or root suckers. If you're dealing with a tree of heaven invasion on your property, there are a few methods you can try to kill the plants and prevent them from coming back.

Method 1: Chemical Herbicides

One of the most effective ways to kill tree of heaven plants is to use chemical herbicides. Herbicides containing glyphosate, such as Roundup, are commonly used to kill unwanted plants, including tree of heaven. To use glyphosate, mix the herbicide according to the instructions on the label, then apply it to the tree of heaven plant using a spray bottle or sprayer. Be sure to wear protective clothing and gloves, and avoid spraying the herbicide on other plants or areas where you don't want it to affect.

Another option for chemical control is using herbicides containing triclopyr, such as Garlon 4. These herbicides work by penetrating the bark of the tree of heaven plant and killing it from the inside out. To use triclopyr, mix according to the instructions on the label and apply to the plant using a brush or sprayer. Be sure to avoid getting triclopyr on other plants or areas where you don't want it to affect.

Method 2: Physical Removal

If you prefer not to use chemical herbicides, physical removal is another option. This method involves using a shovel or other tool to dig up the tree of heaven plant, making sure to remove as much of the root system as possible. You can also cut down the tree of heaven and paint the stump with a herbicide to prevent regrowth. Another option is to use a mower or brush cutter to keep the plants cut back, eventually weakening them over time.

Method 3: Prevention

The best way to deal with tree of heaven plants is to prevent them from becoming a problem in the first place. If you live in an area where tree of heaven is known to grow, take steps to prevent its spread. Remove any tree of heaven plants on your property and dispose of them properly. Make sure to check any new plants or trees you bring onto your property for signs of tree of heaven seeds or root suckers. Use mulch or landscaping fabric to cover bare soil and prevent tree of heaven from sprouting.

In summary, there are several methods you can try to kill tree of heaven plants, including chemical herbicides, physical removal, and prevention. Whether you prefer to use chemical or non-chemical methods, the key is to act quickly before the plants have a chance to spread and take over your yard or garden.