The Tree of Heaven, known scientifically as Ailanthus altissima, is a fast-growing invasive species that poses a significant ecological threat in many regions. Native to China, it has spread across the globe, dominating areas with its aggressive growth and extensive root system.

Invasive and difficult to eradicate, controlling Tree of Heaven requires the use of the best herbicides. This guide reviews the most effective products, providing you with the tools to manage and eliminate this stubborn plant from your landscape or property.

10 Best Herbicides for Tree of Heaven

1. Garlon 4 Ultra

Garlon 4 Ultra is a highly effective herbicide for controlling invasive trees like the Tree of Heaven. It contains triclopyr, which targets the tree’s vascular system to kill it slowly but surely.

This herbicide is particularly effective in cut-stump or basal bark applications. Its long-lasting formula prevents the regrowth of the tree by targeting the root system.

While powerful, Garlon 4 Ultra should be used with caution around desirable plants, as it can also affect nearby vegetation.

2. Pathfinder II

Pathfinder II is a ready-to-use herbicide designed for controlling woody plants like Tree of Heaven. Its active ingredient, triclopyr, is highly effective when applied to freshly cut surfaces or bark.

It provides quick results and can be used year-round for persistent control of invasive species. Its application is simple, requiring no mixing or special equipment.

However, care must be taken not to spill it onto non-target plants, as it is non-selective and will damage other vegetation.

3. Crossbow Herbicide

Crossbow Herbicide is a powerful solution combining triclopyr and 2,4-D, offering excellent control of woody plants like Tree of Heaven. This combination enhances its efficiency against large, established trees.

It works through a soil absorption method, reaching the tree’s roots and killing it from the inside out. Crossbow is especially effective during the growing season when trees are actively absorbing nutrients.

Crossbow can be harmful to surrounding plants, so apply it carefully and follow the instructions closely to avoid collateral damage.

4. Tordon RTU

Tordon RTU is a premixed herbicide formulated with picloram, which is highly effective in eradicating invasive trees like Tree of Heaven. It is ideal for cut-stump treatments where the herbicide is applied directly to the tree’s cut surface.

It penetrates deep into the roots, providing long-term control and preventing regrowth. Tordon RTU is highly effective in forested and rangeland areas where invasive species are a significant issue.

This herbicide has some environmental restrictions, so be sure to follow all local regulations regarding its use.

5. Roundup (Glyphosate)

Roundup, known for its effectiveness on a wide range of plants, works on Tree of Heaven by killing the tree through systemic absorption. Its active ingredient, glyphosate, blocks the plant’s ability to produce essential amino acids.

Roundup is most effective when applied to fresh cuts or actively growing trees. It can be applied using a variety of methods, including spraying, drenching, or through cut-stump treatment.

While effective, Roundup’s non-selective nature can harm other vegetation, so careful application is crucial to prevent damage to non-target plants.

6. Milestone Herbicide

Milestone Herbicide is another selective option, using aminopyralid to target invasive species like Tree of Heaven. It is a systemic herbicide that moves through the plant, killing it at the roots.

This herbicide is particularly useful for managing tree-of-heaven infestations in pastures and non-crop areas. It works well in both foliar and soil treatments, providing flexibility in how it’s applied.

Milestone is effective, but it can have a residual effect on soil, so care should be taken when using it near crops or gardens.

7. Arsenal Herbicide

Arsenal is a highly effective herbicide with imazapyr as its active ingredient. It targets deep-rooted trees like Tree of Heaven, ensuring thorough eradication when applied properly.

Arsenal is ideal for large-scale applications, particularly in forestry and land management. Its systemic nature allows it to reach the tree’s root system, preventing regrowth.

However, due to its non-selective nature, it can also harm other plants, making careful application important to avoid unintended damage.

8. Escort XP

Escort XP is a selective herbicide containing metsulfuron-methyl, effective at controlling invasive woody plants like Tree of Heaven. It is designed for broad-spectrum control in areas like pastures and rights-of-way.

It inhibits cell division in the tree, leading to its death over time. Escort XP is especially effective when applied early in the growing season for optimal absorption.

Although effective, Escort XP can harm non-target plants, so care must be taken to ensure accurate application to minimize environmental damage.

9. Velpar L

Velpar L is a soil-applied herbicide that uses hexazinone to control deep-rooted trees like Tree of Heaven. It is absorbed by the tree through its roots, providing long-term control.

Velpar is ideal for use in areas where other herbicides may fail, providing consistent and reliable results. Its residual effect ensures that the tree does not return for several seasons.

Velpar L should be used cautiously near water sources, as it can leach into the soil and affect non-target areas.

10. Remedy Ultra

Remedy Ultra is a triclopyr-based herbicide that is highly effective against Tree of Heaven. It can be applied as a foliar spray or through cut-stump treatments.

It is particularly useful in controlling large, established trees due to its ability to penetrate the bark and reach the root system. Remedy Ultra is best applied during the growing season for optimal absorption.

Although effective, this herbicide requires careful handling to avoid contamination of non-target plants and nearby water sources.

Buyer’s Guide: Best Herbicide for Tree of Heaven

• **Select the Right Herbicide:** Choose a product based on your application method and infestation scale. For large infestations, systemic herbicides are recommended for long-term control.
• **Consider the Environmental Impact:** Opt for selective herbicides if you have concerns about non-target vegetation. Ensure the herbicide you choose has minimal residual effects on the environment.
• **Application Timing:** Apply herbicides during the growing season for the most effective results. Some products are best used during the tree’s active growth to ensure absorption.
• **Read Instructions Carefully:** Always follow the manufacturer’s guidelines for application to avoid overuse or damage to surrounding plants.

Conclusion

Effective control of Tree of Heaven requires the right herbicide, applied carefully and at the right time. With the products and tips outlined above, you can successfully manage this invasive species and protect your landscape.

Choosing the best herbicide will depend on the severity of your infestation and your preferred application method. Remember to always follow safety precautions when handling herbicides to ensure safe and effective use.