Weed Control
Best Brush Killer: The Method Decides the Formulation
Penn State: an oil-based triclopyr ester goes on any time after cutting; a water-based one must be applied immediately. Choose the method, then the bottle.
Selective Broadleaf Herbicide — cool-season turf label (ester concentrate)
Hi-Yield Triclopyr Ester, 16 oz Review
★★★★☆ 4.2/5
our editor rating how we score4.5/5 from 1,703 shoppers at Amazon — their number, not ours.
$33–$42
Typical price · 16 oz concentrate; brush and cut-stump rates per label
Affiliate links — see our disclosure. Commissions never influence verdicts.
Sold as a brush killer and labelled as a turf herbicide. The label's only site is perennial bluegrass, perennial ryegrass and tall fescue — and ground ivy and wild violet are both on its weed list.
Our Verdict
Read the label rather than the listing, because on this product they disagree. The marketplace listing sells it as woody plants, vines and brush in non-crop areas. The EPA-approved label (81927-11-7401) states one site: perennial bluegrass, perennial ryegrass and tall fescue ornamental turf, including sod farms, commercial turf and golf courses. Its broadcast rate is 3/8 to 3/4 fluid ounces per 1,000 square feet, and its weed table is a lawn weed table — ground ivy, wild violet, clover, oxalis, black medic, Canada and bull thistle, curly dock, yarrow. There is no brush section and no poison ivy on it. So it is a genuine option for the two weeds cool-season lawn owners struggle with most, ground ivy and wild violet, and it is the wrong purchase for brambles or a cut stump despite what the listing says. Two real cautions remain. It is an ESTER, not the amine salt most turf products use: esters penetrate better and are more volatile, so the label's temperature and drift guidance is not boilerplate. And the site list is exclusive — the label says do not use on other turfgrass species unless injury can be tolerated, which rules out bermuda, zoysia, St. Augustine and centipede lawns.
✅ Pros
- Ground ivy AND wild violet both on the label's weed table — the two weeds three-way products most often fail on
- Labelled for the three main cool-season lawn grasses: perennial bluegrass, perennial ryegrass, tall fescue
- Broadcast rate of 3/8 to 3/4 fl oz per 1,000 sq ft, so a 16 oz bottle covers a lot of lawn
- Also listed for Canada and bull thistle, curly dock, yarrow and black medic — an unusually wide table for one active
⚠️ Cons
- Ester rather than amine salt: more volatile, so vapour movement onto sensitive plants on a warm day is a real risk
- Label site list is exclusive — do not use on bermuda, zoysia, St. Augustine or centipede unless injury can be tolerated
- NOT a brush product despite the listing text: no brush section on the label and poison ivy is not on it
- Repeat applications must be at least 4 weeks apart, and not on heat- or drought-stressed turf
Product type
Selective Broadleaf Herbicide — cool-season turf label (ester concentrate)
Active ingredient
Triclopyr, butoxyethyl ester
Price range
$33–$42
Coverage
16 oz concentrate; brush and cut-stump rates per label
Best for
Ground ivy and wild violet in a Kentucky bluegrass, perennial ryegrass or tall fescue lawn
our editor rating
4.2 out of 5
Where our facts come from
Label read on the registrant's own PDF
EPA Reg. No. 81927-11-7401
We read the printed label published by the company that holds the registration. EPA hosts no PDF for this one, so this is the best available text.
What we found when we read it
CORRECTED 2026-08-02 after reading the label. This record previously described it as a non-crop brush herbicide for brambles, multiflora rose, honeysuckle and cut stumps, and stated it was 'not a lawn product' — all of that came from the Amazon listing title, and the label contradicts every part of it. The label's single site is perennial bluegrass / perennial ryegrass / tall fescue ornamental turf; Table 2 is a lawn weed table containing Ground Ivy and Wild Violet; there is no brush section and poison ivy is absent. brush-and-woody-plant-control.mdx carried the same wrong claim and was corrected in the same pass. This is the clearest example so far of why label_url exists.
Where this page and the container disagree, the container wins — the label is the legal authority on rates and restrictions. How to read one yourself.
Where This Product Matters
Matched against each state's actual disease, weed and pest pressure.
Alabama
Alabama hub →🌾 Tall Fescue
Application window: April–May and September, and check every label against centipede before it leaves the shelf
Alaska
Alaska hub →White clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: June through July, inside the same short window everything else happens in. There is no autumn second chance
Arizona
Arizona hub →🌾 Perennial Ryegrass
Application window: March–May and during monsoon flushes; Celsius-type products handle 100°F+ windows
Arkansas
Arkansas hub →🌾 Tall Fescue
Application window: Bounded by the label's temperature ceiling rather than the calendar — spring treatments finish before the June heat arrives, and nothing selective goes down again until September cools off
California
California hub →Oxalis (creeping woodsorrel)
🌾 Tall Fescue
Application window: March–May while weeds are young; avoid spraying drought-stressed turf in summer
Colorado
Colorado hub →White cloverClover and Banks grass mites (dry winters and hot dry summers)
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: May–June and September; high-altitude sun makes stressed turf easy to injure, so spot-treat rather than blanket-spray
Connecticut
Connecticut hub →White clover
🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: Broadleaf sprays in May–June and again in September, when the weeds are moving sugars to the roots; skip July and August, when a stressed cool-season lawn takes the injury and the weed does not
Delaware
Delaware hub →White cloverGround ivy
🌾 Tall Fescue🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: April to late May, then September into October. Skip July and August entirely: this is the transition zone, and a stressed tall fescue lawn takes the injury the weed shrugs off
Georgia
Georgia hub →🌾 Tall Fescue
Application window: April to early June and September–October; avoid mid-summer sprays on stressed turf
Hawaii
Hawaii hub →Oxalis
Application window: Year-round where the turf is actively growing, which is most of the time; the constraint is heat and drought stress on the leeward side rather than a dormant season
Idaho
Idaho hub →White clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: Late April into June, then September into October; skip the July and early August heat, which is also when UI's own fertilizer schedule goes quiet
Illinois
Illinois hub →Wild violet
🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: May–June and September; fall beats creeping charlie best
Indiana
Indiana hub →Ground ivyWhite cloverWild violet
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: October is the most effective month for broadleaf weeds; never apply above 80°F or to drought-stressed turf
Iowa
Iowa hub →White clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: October, and October is most of it — but check the wind and the date against what is happening in the fields, because early-summer growth-regulator drift is a real seasonal risk here and your own spray carries the same way
Kansas
Kansas hub →🌾 Tall Fescue🌾 Kentucky Bluegrass
Application window: April into May and again in September–October; avoid July and August, when a tall fescue lawn here is already at its limit
Kentucky
Kentucky hub →Ground ivy
🌾 Kentucky Bluegrass
Application window: April–May and September–October; autumn is the knockout window for the wild garlic that defines a Kentucky winter lawn
Maine
Maine hub →White cloverGround ivy
🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: June, then a narrow late-August to mid-September window. Maine's usable autumn is the shortest in New England
Maryland
Maryland hub →Ground ivy (creeping charlie)Wild violetWhite clover
🌾 Kentucky Bluegrass
Application window: April–May and September–October; autumn is the knockout window for the ground ivy and violet the Piedmont is full of
Massachusetts
Massachusetts hub →Ground ivyWhite clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: A narrow autumn is the real window here: late September into October, after the summer heat and before New England's early frost closes the season
Michigan
Michigan hub →Ground ivy (creeping charlie)White cloverWild violet
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: May–June and September; autumn is the stronger window for perennial broadleaf weeds
Minnesota
Minnesota hub →🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: Late May–June and September; autumn is the stronger window for perennial broadleaf weeds
Missouri
Missouri hub →White clover
🌾 Kentucky Bluegrass
Application window: April–May and September–October; skip summer sprays on drought-stressed fescue
Montana
Montana hub →White cloverCanada thistle and other listed noxious weeds pushing in from unmanaged edges
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: June, then late August into September. In a sub-100-day valley there is no third chance
Nebraska
Nebraska hub →White clover
🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: Late spring and again from late August through September, when perennial broadleaf weeds are moving reserves to the root
Nevada
Nevada hub →🌾 Tall Fescue🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: March–April and October in the south; May and September in the north
New Hampshire
New Hampshire hub →White cloverGround ivy
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: Late May into June, then late August through September. The autumn window closes earlier here than anywhere else in southern New England
New Jersey
New Jersey hub →White cloverGround ivy
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: May and September–October; autumn is the knockout window for perennial broadleaf weeds
New Mexico
New Mexico hub →🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: Spring and early autumn; in the south skip the June heat entirely, and in the north the usable autumn window closes by early October
New York
New York hub →Ground ivyWild violetWhite clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: May and September–October; autumn is the knockout window for perennial broadleaf weeds
North Carolina
North Carolina hub →White cloverWild violet
🌾 Tall Fescue🌾 Kentucky Bluegrass
Application window: April–May and September–October; avoid spraying heat-stressed fescue in July–August
North Dakota
North Dakota hub →White clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: Early to mid-June, then late August into early September. There is no third opportunity
Ohio
Ohio hub →Ground ivy (creeping charlie)White cloverWild violet
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: May–June and September; fall applications hit dandelion taproots hardest
Oklahoma
Oklahoma hub →🌾 Tall Fescue
Application window: Judged by wind before season: sustained wind is Oklahoma's normal condition, so the usable spray days are calm mornings in April, May and September rather than whole months
Oregon
Oregon hub →🌾 Perennial Ryegrass🌾 Kentucky Bluegrass🌾 Tall Fescue
Application window: March–May and September–October; the long mild shoulder seasons give more usable spray days than most states get
Pennsylvania
Pennsylvania hub →Ground ivyWild violetWhite clover
🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: May and September — fall is the knockout window for perennial broadleaf weeds
Rhode Island
Rhode Island hub →White cloverGround ivy
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: Broadleaf work in May–June and again in September; the September pass is the one that holds, because the weed is moving reserves down
South Carolina
South Carolina hub →🌾 Tall Fescue
Application window: April–May and September–October, and never above 90°F — centipedegrass is sensitive to 2,4-D both at spring green-up and in summer heat
South Dakota
South Dakota hub →White clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: Early to mid-June, then late August into September, which is the pass that actually holds on perennial broadleaf weeds
Tennessee
Tennessee hub →🌾 Tall Fescue🌾 Kentucky Bluegrass
Application window: April–May and September–October; skip sprays on drought-stressed summer fescue
Texas
Texas hub →🌾 Tall Fescue
Application window: April–early June and September–October; avoid herbicides above 90°F
Utah
Utah hub →🌾 Kentucky Bluegrass🌾 Tall Fescue🌾 Perennial Ryegrass
Application window: May and September, avoiding the intense midsummer heat on the label
Vermont
Vermont hub →White cloverGround ivy
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass🌾 Tall Fescue
Application window: Late May through June, then a short late-August to mid-September window. Vermont's autumn window is the narrowest in New England
Virginia
Virginia hub →White clover
🌾 Tall Fescue🌾 Kentucky Bluegrass
Application window: April–May and September–October; skip sprays on heat-stressed fescue in July and August
Washington
Washington hub →White clover
🌾 Perennial Ryegrass🌾 Kentucky Bluegrass
Application window: April–May and September–October; WSU caps applications at 80°F, stricter than the 85–90°F ceilings used elsewhere
West Virginia
West Virginia hub →Wild violetWhite clover
🌾 Tall Fescue🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: April into May and again in September–October. Skip July and August: this is transition-zone country and a heat-stressed tall fescue lawn absorbs the injury the weed does not
Wisconsin
Wisconsin hub →White clover
🌾 Kentucky Bluegrass🌾 Perennial Ryegrass
Application window: Early to mid-fall is the favourable window for dandelion and other perennial broadleaf weeds
Wyoming
Wyoming hub →White cloverCanada thistle and other listed noxious species moving in from unmanaged edges
🌾 Kentucky Bluegrass🌾 Tall Fescue
Application window: June, then late August into September. UW's own framing is useful: a slow-release application covers a 90 to 100 day growing season, which is roughly the entire Wyoming season
Common questions
Common Questions
How much does Hi-Yield Triclopyr Ester, 16 oz cost?
Hi-Yield Triclopyr Ester, 16 oz typically runs $33–$42, covering 16 oz concentrate; brush and cut-stump rates per label.
What does Hi-Yield Triclopyr Ester, 16 oz treat?
Hi-Yield Triclopyr Ester, 16 oz targets ground ivy (creeping charlie), wild violet, clover, oxalis, Canada thistle, curly dock.
What is the active ingredient in Hi-Yield Triclopyr Ester, 16 oz?
Triclopyr, butoxyethyl ester, registered under EPA Reg. No. 81927-11-7401.
What is the biggest downside of Hi-Yield Triclopyr Ester, 16 oz?
Ester rather than amine salt: more volatile, so vapour movement onto sensitive plants on a warm day is a real risk
Real feedback
Customer Reviews
No reviews yet — be the first to share how Hi-Yield Triclopyr Ester, 16 oz worked for your lawn.
Leave a review
Thanks — we read every submission by hand, so it may take a little while to appear.
Related Guides
Weed Control
Triclopyr Ester vs Amine: Same Active, Different Risk
Both bottles say triclopyr. The words after it decide whether the spray stays where you put it — MSU measured ester drift injury at 50, amine under 20.
Weed Control
How to Kill Bermuda Grass in a Fescue Lawn: Mow It Out First
Virginia Tech: tall fescue can completely kill bermudagrass at a 4-inch mowing height with no herbicide. Mow lower and no product will save you.
Weed Control
Brush Control in Pasture: Mowing Multiflora Rose Spreads It
Penn State: a cane tip touching the ground roots and makes a new plant. Mowing takes three to six passes a season for over a year — or 8 to 10 goats per acre.
Weed Control
Pasture Weed Control: The Label Restriction Comes First
Grazing restrictions run from seven days to a year, and beef and dairy differ. UGA: without cultural practices, herbicide use will not be beneficial.
Weed Control
How to Get Rid of Clover in Lawn (Or Keep It On Purpose)
Clover spreads where nitrogen is short — it makes its own. Feed the turf and it recedes. If you still want it out, four actives work and one popular one is absent.
Weed Control
How to Kill Creeping Charlie and Wild Violet
Creeping Charlie and wild violet shrug off standard three-way weed killer for two different reasons. Both answer to triclopyr — and to October, not spring.
Lawn Health Newsletter
Seasonal lawn reminders, on time
Pre-emergent windows, disease alerts and fertilization schedules for your region — one short email, right when your lawn needs it.
Free forever. Unsubscribe anytime. US lawns only (for now). This season's companion: the printable summer checklist.