You cut down a tree, but a stubborn stump stays in your yard. Weeks later, you are sawing off sprouts again, or worse, the stump itself tries to regrow. The right chemical treatment painted onto a fresh cut stops that cycle for good, and which product you choose depends on whether you want the stump gone in days or you are willing to wait months.
I’m Rikta — the co-founder and writer behind Lawn Gear Lab. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
After looking at the core specs and thousands of buyer experiences, these stand out as the most effective options for the stump killer you can rely on to stop regrowth without wasting your time on weak formulas.
How To Choose The Best Stump Killer
The wrong stump killer means you wait months with zero results or have to reapply. Understanding the three factors that separate effective products from duds saves you time and money.
Liquid concentrate vs. granular powder
You will see two types of stump killers. Granular powders, like the Hi-Yield Stump Remover, rely on potassium nitrate (a salt that feeds wood-rotting fungi) to accelerate natural wood decay. That can take several weeks or months and works best if you also burn the stump. Liquid concentrates, such as Fertilome and Southern Ag, use the active ingredient Triclopyr (a synthetic herbicide that stops plant cells from growing) and kill the stump by moving through the sap system into the roots. They stop regrowth much faster—often within days on small stumps. For most homeowners, the liquid approach delivers visible results sooner.
Application window and ease of use
The biggest mistake people make is applying the killer too late. For liquid concentrates like Triclopyr, you must brush the chemical onto the outer ring of the stump (the cambium layer, which is the living tissue just under the bark) within 45 minutes of cutting the tree. If you miss that window, the stump seals itself off and the chemical cannot penetrate. Ready-to-use formulas like ALLIGARE Triumph come pre-mixed with a squirt bottle and a blue dye that shows you exactly where you have painted, so you avoid missed spots or over-application.
Coverage and value per ounce
One 8-ounce bottle of concentrate typically mixes with a gallon of water for spraying leaves, or you can use it undiluted with a brush for painting stumps. Larger bottles like the 16-ounce Southern Ag or the 32-ounce ready-to-use ALLIGARE cover more ground—often 2 to 4 times more stumps per bottle. If you have a long fence line or multiple stumps, the bigger container saves you a second purchase.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Category | Best For | Key Spec | Amazon |
|---|---|---|---|---|
| ALLIGARE Triumph RTU | Premium Ready-to-Use | Fast, visible applications | 32 oz with blue dye | Amazon |
| Fertilome Brush Killer | Mid-Range Concentrate | Small stumps & volunteer trees | 8 oz Triclopyr concentrate | Amazon |
| Southern Ag Brush Killer | Mid-Range Concentrate | Heavy regrowth prevention | 16 oz with Triclopyr | Amazon |
| Stump Stop w/ Gloves | Premium Ready-to-Use | Large properties & fence lines | 32 oz with included gloves | Amazon |
| Bonide Vine & Stump Killer | Value Concentrate (2-Pack) | Brambles & thick vines | Two 8 oz bottles, concentrate | Amazon |
| Hi-Yield Stump Remover | Budget Granular | Budget buyers willing to wait | 1.5 lb granular powder | Amazon |
In‑Depth Reviews
1. ALLIGARE Triumph RTU Herbicide Weed Killer
32 fluid ounces of ready-to-use liquid with a built-in blue dye makes the ALLIGARE Triumph RTU Herbicide Weed Killer the top pick for anyone who wants a pre-mixed, no-measure stump killer that shows exactly where it has been applied. You open the 32-ounce squirt bottle, squirt it onto the freshly cut stump, and the vivid blue color confirms you covered the cambium layer (the living ring just under the bark) without missing a spot or wasting chemical on the center wood.
Buyers report that “Triumph kills tree stumps and weeds permanently; stumps can be kicked away after one year,” which matches the marketing claim that its active ingredients (herbicide compounds similar to Tordon RTU) move through the sap system into the root and stop regrowth for good. At 2 pounds per bottle it is heavy enough to handle a dozen or more stumps, and its 32-fluid-ounce volume gives you a 2x advantage over the 16-ounce ready-to-use Bonide concentrate, meaning you treat more stumps before running out.
The catch is packaging: several owners mention the cap can arrive loose or even off, with the thin safety seal being the only thing preventing a leak of a toxic chemical. If you buy this excellent formula, open it over the sink and store it upright. Verdict: the smartest, most complete stump killer for anyone who wants guaranteed results with zero mixing guesswork.
Why it’s great
- Pre-mixed, no measuring or diluting needed—just apply.
- Blue dye lets you see coverage in real time.
- 32 oz bottle treats many stumps; works year-round.
Good to know
- Cap can arrive loose or leak during shipping.
- If it gets on desirable plants via wind or drip, it kills them too.
2. Fertilome (11483) Brush Killer Stump Killer (8 oz)
Against the top-pick ALLIGARE Triumph, the Fertilome concentrate wins on raw speed because it comes with a built-in brush applicator (so you do not need to buy a separate disposal brush). At 8 ounces concentrated, it mixes with a gallon of water for spraying leaves or stays undiluted for painting stumps. Where the ALLIGARE is ready-to-use, this one gives you a whole gallon of spray for the same money if you have a large patch of poison ivy or buckthorn to hit.
Customers note it “successfully killed a persistent volunteer Mulberry tree after 10 days; applied to fresh cut stump,” which is unusually fast for a liquid stump killer. The active ingredient Triclopyr works by binding to the plant’s growth receptors and stopping cell division, so the stump cannot send up new shoots. It is also safe near other plants if you paint carefully—the chemical only kills what it touches, unlike some soil-sterilizing formulas.
Choose this over the ALLIGARE if you prefer a concentrate you can dilute for large spray jobs and want the included brush for immediate stump painting. A minor complaint from reviewers is that the bottle does not seal tightly and can leak, so tape the cap or store it upright in a plastic bag.
Where it shines
- Concentrate creates 1 gallon of spray for broadleaf brush.
- Included brush applicator saves you a separate purchase.
- Safe for use near non-target plants when applied carefully.
Worth noting
- Cap leaks on some bottles; check the seal before storing.
- May need a second application on stumps 3-6 inches.
3. Southern Ag 01112 Brush Killer Stump Treatment, 16oz
If you are dealing with a mix of medium stumps and bush regrowth along a fence line, the Southern Ag gives you exactly twice the liquid volume as the Fertilome (16 oz vs. 8 oz) for a small step up in price, making it the most cost-effective Triclopyr concentrate for heavy users. The bottle contains 16 fluid ounces of liquid and weighs 1.17 pounds, so you can treat roughly 30 small stumps or about 15 medium ones before hitting the bottom.
Reviewers point out it is “effective on 2″ silver maple, no regrowth,” and several note that even roots underground started disintegrating weeks after painting the cut surface. The key to success with this product—and all concentrates—is applying it immediately after cutting: you brush the undiluted liquid on the outer ring of the stump within 45 minutes. Reviewers recommend using a disposable chip brush (not a spray) and applying 2-3 layers if the wood absorbs fast.
One user was disappointed when it did not work on garden weeds sprayed at a low concentration, which is a reminder that this is a stump and brush killer, not a general weed spray for healthy green leaves. The standout spec here is the 2-to-1 volume advantage over the closest competitor at the same tier, giving you more stump-killing per dollar.
What stands out
- Double the liquid (16 oz) vs. most 8-oz competitors.
- Kills stumps and prevents regrowth with one application.
- Great for medium stumps and thick brush.
The trade-offs
- Best applied with a disposable chip brush, not a sprayer.
- Effectiveness depends on painting the fresh cut within 45 minutes.
4. Ready-to-use Stump Stop – 32 Fl. Oz
The single number that matters most in this category is 32 fluid ounces—the most liquid on this list—and Stump Stop delivers it in a ready-to-use (pre-mixed) bottle that also includes a pair of gloves, a smart add-on that saves you remembering to buy your own. Its 1 Count unit size means one bottle goes a long way.
Shoppers say that “Stump Stop effectively kills hedge stumps,” and one reviewer who used it on elm roots saw greenery wilt within two days. The pre-mixed formula means you do not measure or dilute, and the small application hole on the bottle lets you control the flow precisely onto the cambium layer. The label says it is safe for grazed areas—so if you treat stumps in a pasture, the brand states you can keep the animals there without waiting.
The honest trade-off is the premium price: you pay more than double what the 16-ounce Southern Ag costs, though you get double the liquid plus gloves. The main reason to choose this over the others is sheer convenience—one ready-to-use bottle with gloves for a day of heavy stump-treating along a fence line or in a forest—making the price-to-value read as a fair exchange for time saved and included gear.
The upsides
- Large 32 oz ready-to-use bottle treats many stumps.
- Includes gloves, saving you a separate purchase.
- Labeled as safe for grazed areas; useful for pasture management.
Keep in mind
- Premium price point compared to smaller concentrates.
- Avoid spraying on windy days—can drift onto desirable plants.
5. Bonide Vine & Stump Killer With Applicator Concentrate 8 Oz, 2 Pack
What you actually get at this lower price is a 2-pack of 8-ounce concentrate bottles, giving you 16 total fluid ounces of Bonide Vine & Stump Killer. The active ingredient is sodium metabisulfite, a compound different from Triclopyr that works by damaging plant cell walls and drying out the tissue, which makes it especially effective on soft-stemmed invasive vines.
Buyers report it is “effective on raspberry/blackberry bushes after snipping and painting cut ends,” with results visible in weeks as leaves turn yellow and tips brown. The included applicator (a small brush) lets you dab the concentrate directly onto each cut stem. The downside, noted by several reviewers, is that the bottle caps often arrive loose, and one reviewer noted “one bottle was leaking upon arrival; otherwise 5 stars.” The two-pack is small and pricey per ounce compared to the larger Southern Ag, so budget for potential leakage.
This is the perfect pick for the specific buyer who is battling invasive brambles rather than tree stumps, because the sodium metabisulfite formulation targets vine tissue more aggressively than Triclopyr does. If you are protecting a garden from blackberry or bindweed, this is your tool—making it the exact budget buyer it is perfect for.
Why we’d pick it
- Two bottles give you a backup or a longer reach.
- Works very well on brambles and thick vines.
- Included applicator brush for precise cut-end painting.
A few caveats
- Caps leak frequently during shipping; store upright.
- More expensive per ounce than single-bottle concentrates.
6. Hi-Yield (32015) Stump Remover (1.5 lbs.)
This is the perfect pick for the budget-conscious buyer with a large, dry stump in a safe location where they can drill holes, pour the powder, and burn it after a few weeks.
At the lowest point on the price ladder, the Hi-Yield Stump Remover gives you 1.5 pounds of granular powder for a budget-friendly entry into stump removal. This product works differently from the liquid concentrates above: it uses potassium nitrate (a salt compound) to accelerate natural wood decomposition, making the stump spongy and easier to burn or break apart over several weeks to months. The big trade-off is effectiveness. One buyer reports “ineffective after months of use; no results,” while another says it works with fire (you drill holes, pour the powder in, and burn the stump). This is not a herbicide, so it will not kill living roots or stop regrowth—it just rots the wood faster.
If the stump is near a gas line or structure, you cannot burn it, and the powder will likely disappoint you.
Strong points
- Lowest price point of any product on this list.
- Harmless to surrounding vegetation—granules only affect the stump.
- Works well if you combine with fire for burning.
Before you buy
- Slow decomposition: takes weeks or months.
- Does not stop shrub or tree regrowth—only rots wood.
- Not a true herbicide; needs burning for full effect.
Understanding the Specs
Triclopyr vs. sodium metabisulfite
The two main active ingredients in liquid stump killers work differently. Triclopyr (found in Fertilome, Southern Ag, and ALLIGARE) is a synthetic auxin—a chemical that mimics a plant growth hormone, causing uncontrolled cell division that kills the plant from the inside. It moves through the sap into the root system, stopping regrowth. Sodium metabisulfite (in Bonide) works by dehydrating plant cells, making it better for soft-stemmed vines than for large hardwood stumps. Always check the active ingredient before buying.
Ready-to-use vs. concentrate
Ready-to-use (RTU) formulas come pre-mixed in a squirt bottle so you apply them directly—no measuring, no water. They are perfect for small jobs or if you hate cleanup. Concentrates require you to mix 8 ounces with a gallon of water for spray application, or use them undiluted with a brush. Concentrates cost less per ounce of active ingredient and give you more total product, but they demand more effort and a disposable brush.
FAQ
How long does a stump killer take to work?
Can I use stump killer near other plants I want to keep?
What is the best way to apply a liquid stump killer?
Final Thoughts: The Verdict
If you want one dependable pick, the stump killer winner is the ALLIGARE Triumph RTU because it offers zero-mixing convenience, a visible blue dye for precise application, and proven results even on large stumps. If you want a concentrate you can dilute for a full gallon of spray and prefer an included brush applicator, grab the Fertilome Brush Killer. For the budget buyer who wants the most liquid volume per dollar for medium stumps, the standout is the Southern Ag Brush Killer.