How to Apply Herbicide for Creeping Charlie | Two-Spray Fall Plan

Apply a triclopyr-based or three-way broadleaf herbicide in mid-to-late autumn after the first frost, then repeat the spray 3–4 weeks later for complete creeping Charlie control.

That distinctive scalloped leaf with the minty smell has probably already taken over patches of your lawn. creeping Charlie (Glechoma hederacea) spreads through both seeds and creeping stems called stolons, which means one pass with the sprayer never does the job. The difference between a season-long battle and actual control comes down to two things: picking the right active ingredient and timing the applications when the plant is pulling chemicals down to its roots.

What Herbicide Actually Kills Creeping Charlie?

The active ingredient matters more than the brand name on the bottle. University extension research from Illinois and Wisconsin confirms that triclopyr is the single most effective option for homeowners, often working better alone than in combination formulas because the concentration is higher. A three-way mix of 2,4-D, MCPP, and dicamba also works well. Skip any product that lists 2,4-D as its only active ingredient — extension services report it’s not effective against creeping Charlie on its own.

Why Fall Applications Work Better Than Spring

Mid-to-late autumn, specifically after the first frost, is the best window for spraying. In fall, the plant begins moving nutrients and carbohydrates down into its root system for winter dormancy, and the herbicide travels with that flow. Spring applications during the April-to-June bloom period are effective but less reliable — you’ll still need two passes. Summer applications often fail because heat stress slows the plant’s metabolism, and the herbicide sits on the leaves without being absorbed.

Temperature matters too. Apply only when daytime temps sit between the mid-60s and low-80s, with no rain expected for at least 24 hours. Mowing should stop 2–3 days before treatment and stay paused for 3–4 days afterward so the leaves have maximum surface area to absorb the spray.

Step-by-Step: How To Apply Creeping Charlie Herbicide

A handheld or backpack sprayer gives you the precision that hose-end attachments can’t match, especially for spot treatment. Here’s the exact procedure that works.

1. Identify the area. Measure the patches you’re targeting so you mix the right volume — 1 gallon of mixed solution covers roughly 200–1,000 square feet depending on the product concentration.
2. Mix the herbicide. For a triclopyr product like Hi-Yield Triclopyr Ester, use 3/4 fl. oz. per gallon of water. Add 1 fl. oz. of surfactant per gallon to help the spray stick to the waxy leaves instead of beading off.
3. Spray thoroughly. Coat every leaf on the creeping Charlie patch, but avoid saturating the surrounding grass. Spot treatment prevents collateral burn on your lawn.
4. Wait 3–4 weeks. This is the step most people skip. The first spray weakens the plant, but only the second spray delivers a knockout because it catches regrowth from root pieces that survived the first round.
5. Apply the second dose. Use the same product and mix ratio. In heavy infestations, a third application the following fall may be necessary.

You’ll know it’s working when the leaves curl and yellow within 7–14 days of each application. If you want a full breakdown of the most effective products tested for creeping Charlie control, that roundup covers the exact bottles that get results.

Table: Recommended Herbicide Options for Creeping Charlie

What NOT to Use: Borax and Other Myths

The homemade borax recipe using 20 Mule Team Borax still circulates online, but Illinois Extension explicitly warns against it. Boron from borax builds up in the soil at toxic levels that kill desirable plants and earthworms, and the results are wildly inconsistent — you might see temporary wilting followed by full regrowth. 2,4-D alone also fails repeatedly in university trials. Stick with the triclopyr or three-way mix options that have the research behind them.

Key Timing and Safety Rules at a Glance

Fall Checklist: Your Two-Spray Plan

Here’s the sequence that turns a creeping Charlie infestation into a memory. Wait for the first hard frost. Mix your triclopyr-based herbicide with surfactant in a handheld sprayer. Spot-treat every patch you can see. Mark your calendar for exactly 3 weeks later. Spray again with the same mix. The following spring, overseed any bare spots and watch — if a few survivors appear, one more fall round should finish them.