Russian Thistle Control: How to Get Rid of Russian Thistle

This page is a general DIY guide for controlling Russian thistle. Using the products and methods suggested you will get rid of Russian thistle. Follow this DIY article and use the recommended products, and we guarantee complete control of Russian thistle.

Russian thistle is a broadleaf summer annual weed that is common in the southwest portion of the United States. Most of the time, homeowners often notice this noxious weed more during the summer when it turns into a tumbleweed.

Usually when homeowners think of Russian thistles, they picture its tumbleweed weed form tumbling down a dirt road due to western films. Despite its common media depiction, Russian thistle, often known as tumbleweed is not a native plant.

As its name suggests, this weed originates from southeastern Russia and western Siberia and was introduced to the United States by immigrants through contaminated flaxseed imported from Russia.

Since then the Russian thistle has plagued many regions and become a popular icon of the American west. When fully matured this weed becomes dry, making it readily catch fire in extreme hot weathers. With tumbleweeds aka Russian thistles being weeds they compete with desirable foliage for water, space to grow, nutrients, and can even collide with cars or structures when fully matered.

With its ability to roll when fully matured, their sphere-like shape and numerous branches containing seeds allows Russian thistles to spread across numerous landscapes dropping seeds as it goes. To quickly control this prolific seed spreader, follow the products and steps listed throughout this easy to use DIY guide.

Identification

Before proceeding with control of Russian thistles, you will need to be sure that you are dealing with an infestation of tumbleweeds or Russian thistles in your yard. Careless identification can lead you to using the wrong treatment methods, which can be a waste of time and money. Here are typically traits of this weed to know what Russian thistle or tumbleweed looks like:

• Russian thistle, also known as tumbleweed, is a dense intricate branch weed forming a round bush or shrub measuring about one to three feet tall and five feet wide. When fully matured they appear as a skeleton of a shrub.
• In its seedling and juvenile stage, the leaves of this weed grows up to 2 inches in length, and each leaf is tipped with a sharp spike.
• Small inconspicuous flowers grow at the base of the leaves where it meets the stem. The flowers lack true petals and grow up to one-fifth of an inch in diameter. They also have a pink or dark reddish center. Flowers will bloom from late summer to fall.
• At the end of their life cycle, these plants become brown and brittle. They break off at the base, creating round, tumbling weeds.
• Have deep tap-roots that grow over 6 ft. deep with extensive lateral roots over 5 ft.

Use the description and image above to help you properly identify Russian thistle or tumbleweed on your property. If unsure, contact us with a photo of your weed through email or in person at one of our store locations which one of our representatives can examine the weed and recommend proper treatment control. If this is not possible, then you may always speak to our customer service team by phone.

Inspection

Once confirmed that you are dealing with Russian thistle, you can move on to inspection. During this phase, you will locate areas where Russian thistle is thriving in your yard and observe the conditions allowing the weed to survive. This information will help you in knowing where to apply your herbicide application as well as treating these conditions to increase products effects.

Where to Inspect

Russian thistle grows in drier areas with disturbed or loose soils receiving little irrigation such as along fences, paved areas, abandoned lots, crop fields, roads, highways, edge of lawns, driveways, sidewalks, in abandoned lots, field crops, vegetable crops, and underneath plants in poorly tended landscapes and gardens.

Since this weed survives on little irrigation and easily overtakes disturbed lands with little native foliage it will not do well in well-maintained gardens, landscapes, and lawns.

What to Look For

It can be seen in its seedling stage in late April, which resembles a small brush. From late June to August, the leaves become shorter in length and lose its soft, flexibility by becoming stiff with sharp pointed stems.

During the fall and early winter months, the Russian thistle begins to die and break off from their roots at the base of the stem turning into the tumbleweed and rolling wherever the wind takes it. 

Besides the colorful flowers, the Russian thistle is most noticed when piles of moveable round shrubs are seen blowing across your property until its pushed against a structure.

This weed will germinate when temperatures are between 52 and 90 degrees Fahrenheit.

Treatment

Once you have confirmed that Russian thistle or its later developed stage tumbleweed is infesting your property, you can then treat it with herbicides. When using any type of herbicide material you will need to wear the proper personal protective equipment (PPE).

Treating Russian thistle when it is young and actively growing is the best form of control. If allowed to reach more mature stages it becomes more difficult to control due to its extensive root system. 

Fortunately, Russian thistle can be controlled with pre-emergents containing either bromacil, chlorsulfuron, imazapyr, oryzalin, isoxaben, trifluralin, or pendimethalin between late April to August. Apply a herbicide containing one of these active ingredients before the Russian thistle begins to grow at least two to three weeks prior.

If you missed your pre-emergent window, proceed with a post-emergent herbicide formulated with one of the active ingredient such as 2,4-D, glyphosate, triclopyr, paraquat, glufosinate, or dicamba from late June to November. It would be best to spray the weed when it is relatively young before it reaches 4 inches in diameter.

Step 1: Apply Pre-Emergent Late April to August

If you are treating weeds in ornamental landscaping or non-crop areas, check out Quali Pro T/I 2.5 G Trifluralin Herbicide.

Quali Pro T/I 2.5 G Trifluralin Herbicide is a selective pre-emergent herbicide formulated with the active ingredient isoxaben .05% and Trifluralin 2.0% to effectively control germinated weeds like Russian thistle.

With one application this product offers 8 months of selective, residual control in non-cropland sites and ornamentals (container and field grown, groundcovers/perennials, and landscape).

Keep in mind this product cannot be applied in turfgrasses. 

Determine how much Quali Pro T/I 2.5 G Trifluralin Herbicide to use by measuring the square footage of the treatment area. To do this, measure the length and width of the treatment site in feet then multiply (length X width = square footage). For acreage, take the square footage and divide it by one acre (square footage / 43,560 sq. ft. = acre).

Apply 2.3 lbs. of Quali Pro T/I 2.5 G Trifluralin Herbicide per 1,000 sq. ft. of treatment area. 

We recommend using a handheld spreader or push spreader to make applications with this product. After calibrating your spreader to the proper ratio, load the correct amount of Quali Pro T/I 2.5 G Trifluralin Herbicide.

Spread the granules over smooth soil surfaces that is free of clods. Water treated areas with 0.5 inches of water before 3 days pass after application. 

Step 2: Apply Post-Emergent Herbicide Late June to November

2,4-D Amine Selective Post-Emergent Herbicide is a emulsifiable concentrate designed with the active ingredient Dimethylamine Salt of 2,4-D 46.8% to protect most cool-seasoned turf and crops from unwanted broadleaf weeds like Russian thistle. 

Fahrenheit Herbicide is a post-emergent herbicide formulated with Dicamba 33% and Metsulfuron-methyl 5% to kill various weeds like Russian thistle in warm-seasoned turf. 

Spot applications in cool-seasoned turf to control Russian thistle will use a rate of 1/4 pint of 2,4-D Amine Selective Post-Emergent Herbicide with 3 gallons of water.  

Mix 0.2 oz. of Fahrenheit Herbicide in 1 gallon of water per 1,000 sq. ft. to perform spot applications in warm-seasoned turf. Larger applications in warm-seasoned turf will use 6 to 12 oz. of product in 20-80 gallons of water per acre. 

Keep in mind that when making applications over St. Augustinegrass, Bermudagrass, or Zoysiagrass, temporary stunting or chlorosis may occur.

For either of these products we recommend using Nanotek Surfactant. Nanotek Surfactant is a non-herbicide product designed to improve the adhesion and penetration of pesticides onto treated surfaces.

When using Nanotek, just add 1 fl. oz. per 1 gallon of solution.

Fill your sprayer with half of the required water, add measured amount of herbicide material, then pour in other half of water. Shake until solution is thoroughly mixed.

Apply the mixed solution to the top and bottom of the foliage leaves until wet on a fan spray setting, but not to the point of runoff. 

Do not let people or pets enter treated areas until 48 hours have passed after application.

Reapplication intervals with 2, 4-D Amine Selective Post-Emergent Herbicide range from 21 to 30 days. Reapplication intervals with Fahrenheit Herbicide range from 4 to 6 weeks.

Prevention

Once you have eliminated Russian thistle from your property, you will need to implement some preventative measures. Following these preventative practices will help to prevent Russian thistle or tumbleweed from returning on your property.

• Mowing is best done when Russian thistle first blooms. Otherwise, mowing after this stage can help to spread the seeds and further spread the infestation across your property. Mow your grass at proper intervals to maintain a thick growing density.
• When Russian thistle is in the early stages of growth, you may hand-pull them out with a glove covered hand or use a light tilling method with a garden hoe. Its not recommended to hand-pull Russian thistles in later growth stages as the weed becomes more stiff and sharp.
• Collect all dislodged pieces of Russian thistles after mowing, hoeing, and weed pulling then immediately dispose of them. Leaving any remnants of Russian thistles or tumbleweeds can produce seeds for regrowth of infestation.
• Russian thistle is intolerant to shade and thrives on disturbed sites. Established regular fertilizations to encourage competing plant growth and try to not disturb the terrain more than necessary. For rangelands, this may mean adjusting animals to graze on other parts property on a rotation schedule.
• Water your property's foliage with an inch or irrigation to maintain moist soil, but not to the point of being overwatered. This will also help to encourage new plant growth to choke out young Russian thistle.
• Reapply pre-emergent herbicides such as Quali Pro T/I 2.5 G Trifluralin Herbicide during the germination period of late April to August. To control Russian Thistle, apply 2.3 lbs. of product per 1,000 sq. ft. After application, water the product in with at least half an inch of water. Keep in mind this product is not to be used in turf. 
• In a prompt-manner, treat any emerged Russian thistles with 2,4-D Amine Selective Post Emergent Herbicide or Fahrenheit Herbicide. Typically, this will be late June to November.

Key Takeaways

What is Russian Thistles?

• Russian thistle is a summer annual broadleaf weed usually found in dry, disturbed sites such as pastures or along fences. In its later stages of growth, this weed develops wider branches and becomes brittle. Most people recognize Russian thistle when fully matured as a tumbleweed.

How to Get Rid of Russian Thistle

• To get rid of Russian thistle or tumbleweed, you will need to apply a post-emergent such as 2,4-D Amine Selective Post Emergent Herbicide or Fahrenheit Herbicide. 

Preventing Russian Thistle Reinfestation

• Prevent more Russian thistles and tumbleweeds from returning to your property by making pre-emergent applications with products like Quali Pro T/I 2.5 G Trifluralin Herbicide from late April to August. You will also need to implement other cultural practices such as watering your yard and foliage with an inch of irrigation to maintain a moist soil and encourage new plant growth as Russian thistles is intolerant to shade and not a strong competitor with dense vegetation.