7 Best Herbicide To Kill Trumpet Vine | Stop Vine Regrowth

Check Price on Amazon

This is the professional-grade triclopyr concentrate that serious land managers reach for. At 61.6% active ingredient — the same formula as the branded Garlon 4 — this 1-gallon jug provides enough chemical to treat acres of woody brush for a fraction of the retail price of ready-to-use bottles. Trumpet Creeper is named directly in the product’s EPA-approved control table, but with an important caveat: the label restricts it to basal-bark or dormant-stem stump applications, not general foliar spraying.

The ester formulation has an advantage: it penetrates bark more aggressively than the amine salt versions found in most box-store brands, which is exactly why the label calls for a basal-bark or cut-stump approach on trumpet vine rather than a foliar mix. Cut the main stem near the base and apply the concentrate undiluted directly to the fresh-cut surface, or use it as a diluted basal-bark treatment per the label. The strong petroleum odor confirms the ester base is working, but it demands careful handling with nitrile gloves and a respirator.

User feedback highlights its cost efficiency for large-scale invasions. Several owners comparing this directly to smaller bottles of Ortho or BioAdvanced found the per-ounce savings substantial, while noting identical or superior results on difficult woody weeds like black locust and multiflora rose. The main criticism involves the smell and the need for a separate surfactant, which adds a small step for casual users.

Check Price on Amazon

Crossbow combines triclopyr with 2,4-D, giving it a broader spectrum against broadleaf weeds while retaining the woody-vine-killing power needed for trumpet vine. This one-gallon jug makes up to 96 gallons of spray solution, covering up to 2.23 acres. Users consistently praise it for annihilating overgrown ivy, brambles, and trumpet vine within a week when applied as a foliar spray at a 1-2% dilution.

The 2,4-D component accelerates knockdown on the leafy canopy, while the triclopyr does the deep root work. For the cut-stump method, applying it undiluted to the cambium layer stops the trumpet vine from resprouting. The formulation has a 3-day soil half-life, which makes it a safer choice around livestock and wells compared to some persistent herbicides, though overspray on desirable plants still causes damage.

Owner experiences show consistent success on creeping Charlie, jewelweed, and pokeweed in addition to trumpet vine. A few users noted that very rainy conditions or rich soil with high organic matter reduced its efficacy, requiring a second application. The product smells strongly of chemicals during mixing — a proper respirator is non-negotiable.

Check Price on Amazon

Ortho MAX Poison Ivy and Tough Brush Killer Concentrate is the easy-to-find triclopyr option, stocked at most home centers as well as on Amazon. Its EPA label names Trumpet Creeper directly among the woody vines this 8.0% triclopyr (triethylamine salt) formula controls, alongside honeysuckle, kudzu, Virginia creeper, and wild grape, so it is a genuine on-label match for this job rather than a repurposed lawn product.

For a foliar application, mix the concentrate per the label’s dilution rate and thoroughly wet the leaves and stems of actively growing vine; for an established trumpet vine with heavy woody stems, cut the main stem near the base and treat the fresh cut instead. The product is rated rainproof in about 2 hours, which is a helpful cushion if a spray day turns showery.

Because this is a triethylamine (amine) salt rather than an oil-based ester like the professional concentrates, it is less aggressive at penetrating thick bark and waxy cuticles, so an older, well-established trumpet vine may take more than one treatment to fully knock back the root system. It covers roughly 1,000 square feet per gallon of mixed solution and kills over 60 listed types of brush and tough weeds, including poison ivy, poison oak, kudzu, and wild blackberries.

Check Price on Amazon

This Roundup formulation combines triclopyr with diquat dibromide and fluazifop-P-butyl, creating a tri-active stack that kills the trumpet vine canopy quickly while the triclopyr translocates to the roots. The diquat provides the “visible results in hours” claim — it burns the leaf tissue rapidly — but the triclopyr does the real systemic work over the following days. This concentrate treats 1,500 square feet per gallon of mixed solution.

Users report excellent results on poison ivy, kudzu, and woody brush. The hack-and-squirt method with a 50% dilution applied to multiple stems is the most common successful approach for trumpet vine. Several owners with acre-plus properties combined this with a surfactant and cooking oil mixture to improve adhesion on the waxy vine leaves. The rainproof window of 30 minutes is identical to Promax and very forgiving.

The main downside is that the diquat can make the user think the plant is dead too quickly, leading them to stop treatment early. The canopy wilts fast, but the roots may still be alive if the triclopyr did not fully translocate. The label requires waiting at least 28 days before a repeat application, so plan on a longer follow-up window than you might expect for larger trumpet vine root systems. The concentrate size also runs out quickly for extensive infestations — buying multiple bottles gets expensive compared to a gallon jug of pure triclopyr.

Check Price on Amazon

Ferti-lome’s Brush Killer Stump Killer is an 8.8% triclopyr (triethylamine salt) concentrate, and its EPA label lists Trumpet Creeper by name under “Woody Plants and Vines Controlled,” alongside Virginia creeper, honeysuckle, kudzu, and sumac. That makes it a legitimately on-label pick rather than a guess based on marketing copy.

For vine control, the label’s instructions are straightforward: cut the vine first, then treat the fresh-cut surface the same way you would treat a stump — brush on the undiluted concentrate to fully cover the cut. For younger, still-leafy growth, it can also be mixed 8 to 16 tablespoons per gallon of water and applied as a foliar spray over up to 500 square feet. The product is formulated to spare lawn grasses when used as directed, which matters if the vine is climbing through a fence line next to turf.

The main tradeoff is size: at 16 ounces, this bottle is meant for a handful of vines or stumps rather than a whole property’s worth of brush. For anything larger in scale, step up to a full-gallon triclopyr concentrate like the ALLIGARE listed above.

Check Price on Amazon

Bonide’s Vine & Stump Killer (sold as Stump-Out on Bonide’s own site) uses the same 8.8% triclopyr triethylamine salt chemistry found across most of this list, and its EPA label names Trumpet Creeper directly in the “Woody Plants and Vines” control section, right alongside Virginia creeper, sumac, and wild grape.

What sets this bottle apart is the built-in applicator cap — it comes with a brush applicator so you can cut the vine at the base and paint the concentrate directly onto the fresh cut without breaking out a sprayer. That makes it a genuinely convenient option for a homeowner dealing with one or two trumpet vine stems climbing a fence or tree rather than a whole yard of brush.

Each 8-ounce bottle covers roughly 1,000 square feet as a foliar mix, so this two-pack is sized for a handful of spot treatments, not a large-scale clearing job. For bigger infestations, a full-gallon concentrate will be far more economical per ounce.

Check Price on Amazon

Monterey Brush & Vine Control is another 8.8% triclopyr triethylamine salt concentrate, and its EPA label specifically lists trumpet creeper among the woody plants and vines it controls, right next to Virginia creeper and tulip poplar. It is a straightforward, on-label choice rather than a product borrowed from an unrelated use case.

For an actively growing trumpet vine, apply it as a full-coverage foliar spray once the plant is fully leafed out, following the label’s mixing rate. For a mature vine with a thick, woody base, cut the stem and apply the concentrate undiluted directly to the fresh cut — no dilution needed for stump treatment. Expect wilting within days, but full root death can take one to six weeks depending on the size of the root mass.

This is a 1-quart concentrate, not a true ready-to-use product, so you will need a small sprayer or a paintbrush on hand — but it is inexpensive enough per ounce to make it a sensible choice for spot-treating a few resistant vine stems rather than buying a full gallon you will not use.