7 Best Blackberry Bush Killer | Kill Blackberry Permanently

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The Bonide BK-32 is a triclopyr-based concentrate formulated to kill over 240 tough weeds and woody brush without harming most lawn grasses. Users consistently report that a single application, applied on a hot, sunny day with 48 hours of dry weather, completely destroys poison ivy, blackberry, and trumpet vine root systems. The active triclopyr concentration is high enough to deliver total top-kill and prevent rhizome regrowth.

This product doubles as a stump killer — applying the undiluted concentrate directly to a fresh cut with a paintbrush prevents resprouting on cleared canes. It mixes instantly with water for use in a standard tank or hose-end sprayer. Its selective nature makes it a top choice for homeowners who need to clear blackberry from the perimeter of a lawn without killing the fescue or bluegrass.

User feedback shows near-permanent elimination of even the most stubborn allergenic vines when label conditions are followed. A few reviews note that creeping ground ivy and oxalis may require repeat applications due to underground tubers, but for upright blackberry canes the kill rate is exceptional.

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Ortho GroundClear’s poison ivy and brush killer concentrate is built around triclopyr and targets over 60 listed weeds including wild blackberry, kudzu, and poison oak. The product enters through the leaves and moves systemically through the plant, with visible yellowing or wilting occurring in 2 to 6 weeks. It becomes rainproof in just 2 hours, making it more forgiving for unpredictable weather than many competitors.

One standout feature is the battery-operated spray wand included in the kit. The wand has two spray patterns — a wide fan for foliage coverage and a narrow stream for distance. Users point out that the wand prevents hand fatigue during extended sessions and that batteries arrive pre-installed. The mix covers up to 3,200 square feet when diluted, offering strong coverage for a mid-range price.

Customer reports note it kills poison ivy within an hour of application, turning leaves black before they fall. A few users caution that the chemical can cause skin irritation if contact occurs, so wearing long sleeves and pants is essential. It is a concentrate and must be mixed before application.

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Southern AG’s 01113 Brush Weed Killer is a no-frills triclopyr concentrate that punches well above its sticker price. Customers who previously bought generic weed killers from big-box stores report this product as the first that actually killed blackberry and vines growing through weed block and rock. It prevents sprouting on clean-cut stumps and is labeled for use on roadsides, rangeland, pastures, and fence lines.

With a coverage range of 512 to 1,024 square feet per gallon when mixed, this quart-sized bottle offers enough concentrate to handle moderate infestations. User reviews highlight that the high triclopyr concentration matches the active ingredient found in pricier brands like BioAdvanced, but at a significantly lower cost. The formula is effective against most woody brush, although one user noted it did not control strangler fig.

This is a straightforward product without a battery wand or hose-end attachment, so you will need a separate sprayer. It is an ideal option for anyone tackling blackberry on a budget who is comfortable mixing their own solution.

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TORDON RTU is a ready-to-use brush killer designed for spot treatments and stump applications. Users praise it as the only product that killed stubborn weed trees like mulberry and effectively controlled invasive buckthorn and honeysuckle. Applied directly to a fresh cut stump within minutes, it moves into the root system and prevents regrowth with just a small squeeze of the bottle.

The ready-to-use formulation eliminates mixing and measuring, so you can grab the quart bottle and walk straight to the problem area. For blackberry canes that have been cut back, applying TORDON RTU to the stump with a foam brush or the built-in nozzle provides precise control without overspray onto nearby grass. It is non-selective, so avoid contact with wanted plants.

A few users mentioned that stumps which bleed sap heavily may need a second application, but the overall consensus is that it sterilizes the root system effectively. The cost per ounce is higher than concentrates, making it best for small-scale or targeted clearance rather than whole-acre spraying.

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Crossbow is a heavy-duty brush killer from Tenkoz that combines triclopyr with 2,4-D for broad-spectrum control of woody plants and broadleaf weeds. Farmers recommend it as a faster alternative to glyphosate-based products, with reports of poison ivy shriveling the same day and entire areas staying weed-free for up to two years. The gallon bottle covers roughly one acre, making it ideal for large pastures, fence rows, and woodland edges.

Users describe the formula as extremely potent — leaves curl within hours, and total die-off completes in about a week. It can be applied with a battery backpack sprayer for efficiency on tall blackberry thickets without pre-trimming. The strong chemical odor confirms its efficacy, but it demands careful application on calm days to prevent drift onto desirable plants.

One review noted that a single treatment kept a driveway and under-bush area clear for over 24 months, saving countless hours of manual clearing. The 2,4-D component broadens the weed spectrum beyond what triclopyr alone covers, making it a versatile choice for property managers dealing with mixed brush and broadleaf infestations.

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Remedy Ultra from Dow AgroSciences is a top-rated pasture herbicide formulated for rangeland, fence lines, and brush encroachment. Its triclopyr base has a low-odor profile, making it more comfortable to work with than some of the harsher-smelling brush killers. Users report dramatic results on yucca, cogon grass, and small trees that have been stubborn for years, noting complete die-off within a couple of weeks.

This product works systemically on both roots and top growth, and it is safe around children and pets once the treated area has dried according to label directions. The one-gallon size is concentrated enough for extensive pasture restoration projects. Some users mix it with diesel for blackberry and small tree control or tank-mix it with GrazonNext for broader pasture weed management.

Customer feedback highlights that it is expensive per bottle, but a single gallon lasts for over 100 weekly lawn treatments in Florida’s growing conditions. It is not an organic option, but for heavy brush on non-crop land it delivers professional-grade results. Apply on a calm, dry day for best root penetration.

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Southern Ag’s Crossbow is a full-gallon specialty herbicide that combines Garlon (triclopyr) with 2,4-D to cover up to 2.23 acres per bottle. Users who have battled all-overgrown vegetation — ivy, 8-foot weeds, small trees, and blackberry thickets — report total die-off within 48 hours of application. The mix can be diluted to a 1% solution for general spraying or painted full-strength on cut stems for targeted vine control.

A major advantage is its environmental profile: the active ingredients have a 3-day half-life in soil with no detectable glyphosates or neonicotinoids, making it a safer alternative to Roundup. One user praised its effectiveness on Creeping Charlie in Ohio (85–95% kill), though results varied by soil type and rainfall in other states. The strong odor is a trade-off for its rapid action.

Property owners with large, mixed-infestation areas will appreciate the coverage and speed. The 2,4-D content adds muscle against broadleaf weeds that triclopyr alone may not fully suppress. Apply at a flow rate of about 2 ounces per gallon for maximum coverage on dense blackberry. Avoid spraying within 3 days of rain for best results.