The best herbicides for Ailanthus should effectively control this aggressive and invasive species, also known as the Tree of Heaven, which can quickly dominate landscapes, gardens, and forests.

This tree spreads rapidly through both seeds and root suckers, making it challenging to manage once established.

Choosing the right herbicide is essential for managing and potentially eliminating Ailanthus from your property, preventing it from overtaking the area.

In this article, we will explore the best herbicides for controlling Ailanthus and offer valuable tips on effective application methods.

10 Best Herbicides for Ailanthus

1. Garlon 4

Garlon 4 is one of the best herbicides for tackling woody plants like Ailanthus. It’s a systemic herbicide that targets the plant’s vascular system, killing it from the roots up.

Triclopyr 4 EC Compare to Garlon 4 and Remedy 1 Quart

Apply Garlon 4 through basal bark or cut stump methods for optimal results, particularly in areas where the Ailanthus has become established.

2. Crossbow Herbicide

Crossbow Herbicide is a powerful combination of triclopyr and 2,4-D that works well on invasive species like Ailanthus. It targets both the woody roots and stems, making it ideal for larger infestations.

Southern Ag Crossbow Specialty Herbicide Low Volatile Weed & Brush Herbicide, 128oz – Gallon

Apply Crossbow during the growing season for the most effective control, and be cautious around desirable plants, as it can affect them as well.

3. Roundup Concentrate Plus

Roundup Concentrate Plus is a non-selective herbicide that can help control Ailanthus, especially in areas where you don’t mind killing off other vegetation.

Roundup Weed & Grass Killer Concentrate Plus

$31.99 ($1.00 / Fl Oz)

As a glyphosate-based product, Roundup works by targeting the plant’s root system, making it effective for large-scale applications in open spaces.

4. Imazapyr Herbicide

Imazapyr Herbicide is a systemic herbicide that works well for eliminating invasive species like Ailanthus. It is absorbed by the plant’s leaves and translocated throughout the roots.

Alligare Imazapyr 2 SL-Compare to Arsenal Gallon

For optimal results, apply Imazapyr in the growing season when the plant is actively transporting nutrients, ensuring maximum absorption.

5. Tordon RTU

Tordon RTU is a ready-to-use herbicide that works effectively on woody plants like Ailanthus. It’s designed to be applied to freshly cut stumps or directly to the soil around the plant’s roots.

Tordon RTU provides long-lasting control and is especially useful for stubborn Ailanthus trees that have been left unchecked for years.

6. Triclopyr Herbicide

Triclopyr Herbicide is a broad-spectrum herbicide that is effective for treating Ailanthus and other hard-to-kill plants. It is absorbed through the leaves and moves through the plant to kill it from the inside out.

Triclopyr is most effective when applied to Ailanthus trees during the growing season, but care must be taken to avoid nearby desirable plants.

7. Vinegar Herbicide

Vinegar Herbicide is a natural and eco-friendly option that can be used to control smaller infestations of Ailanthus. The acidity of vinegar can damage the plant’s foliage and inhibit further growth.

While vinegar is effective in reducing top growth, it does not kill the roots, so repeated applications may be necessary for complete control.

8. Ornamec Over-The-Top Herbicide

Ornamec Over-The-Top Herbicide is a selective herbicide that is ideal for controlling broadleaf weeds like Ailanthus without harming nearby ornamental plants.

Ornamec is perfect for residential landscapes and other areas where you want to target Ailanthus while preserving the surrounding environment.

9. Celsius WG Herbicide

Celsius WG Herbicide is an effective herbicide that can be used to control both young and mature Ailanthus trees. It works by disrupting the plant’s metabolic processes, leading to its death.

For optimal results, apply Celsius when the plant is actively growing, and it will quickly take effect, especially during warmer weather.

10. Killzall Weed & Grass Killer

Killzall Weed & Grass Killer is a non-selective herbicide that can be effective in controlling Ailanthus in non-crop areas and large-scale treatments.

As a glyphosate-based herbicide, it works to eliminate Ailanthus at its roots, but care must be taken to avoid contact with desirable plants.

Buyer’s Guide: Choosing the Best Herbicide for Ailanthus Control

When selecting a herbicide for Ailanthus (Tree of Heaven) control, consider the following factors:

• Pre-emergent vs. Post-emergent: Pre-emergent herbicides like Tordon work by preventing the seeds from germinating, while post-emergent herbicides such as Glyphosate (Roundup) or Triclopyr are used to kill actively growing Ailanthus plants.
• Selectivity: If you want to target Ailanthus specifically without harming surrounding plants, consider Triclopyr or Garlon. These are selective and can be used to treat trees without damaging grass or other plants. Non-selective options like Glyphosate will kill any plant it comes into contact with, so use carefully around desirable vegetation.
• Timing: Post-emergent herbicides are most effective when applied during the growing season, particularly in early summer when Ailanthus is actively growing. Pre-emergent herbicides should be applied in the fall or early spring before the seeds germinate.
• Application Method: Some herbicides are best applied as a cut stump treatment, especially when dealing with large trees. Others, such as Glyphosate, can be sprayed directly on foliage or bark. Choose a method based on the size of the infestation and the density of surrounding plants.
• Environmental Impact: Always consider the environmental impact of the herbicide. Some chemicals, like Tordon, can be more harmful to surrounding ecosystems, particularly in areas with groundwater or sensitive plant species. Triclopyr is considered safer for use around water and desirable plants when applied properly.

Best Herbicide For Ailanthus (FAQs)

• 1. Is Triclopyr safe for use around water? Yes, Triclopyr is considered safer for use around water than many other herbicides when applied properly.
• 2. Can I use Tordon around other plants? No, Tordon is a non-selective herbicide and can harm surrounding plants. Use carefully.
• 3. Can I use vinegar for large infestations of Ailanthus? Vinegar can help with smaller infestations, but it may not kill the roots of larger trees.
• 4. When is the best time to apply Triclopyr? Triclopyr is most effective during the growing season, particularly in the spring and summer.
• 5. Will Tordon harm other plants? Yes, Tordon can harm nearby vegetation, so use it carefully.

Conclusion

Controlling Ailanthus with herbicides requires careful planning and consideration of several factors. Choose the best herbicide based on your specific needs, whether it’s pre-emergent or post-emergent, selective or non-selective.

Timing, application method, and environmental impact are key elements to take into account when applying herbicides to ensure effective control and minimal harm to surrounding plants.

With the right herbicide and method, you can successfully manage Ailanthus on your property and keep it from spreading further.

For a healthy, Ailanthus-free landscape, consider your options carefully and take action as soon as possible to prevent further infestations.