In late summer, weeds are already growing, so your best option is post-emergent herbicide. Pre-emergent simply won’t help. It is designed to prevent weeds from sprouting, not kill ones that are already visible. Here’s how to make sure your lawn care is timed right and what to use now.
Why Pre-Emergent Doesn’t Work in Late Summer
Pre-emergent herbicides are for prevention, not elimination:
- They form a soil barrier to stop seed germination.
- They’re meant for early spring or sometimes fall use.
- In late summer, weeds have already emerged so it’s too late.
Why Post-Emergent is the Best Choice Now
Post-emergent herbicides are formulated to attack weeds that are already up and growing. These products are absorbed through leaves or stems, making them ideal for use when weeds are visible and active. Late summer is a particularly strategic time to apply them because many weed species are still photosynthesizing and drawing nutrients.
Just make sure you apply when temperatures are below 85°F, any hotter, and your grass may become stressed, reducing the effectiveness of the herbicide. Applying post-emergent when weeds are actively growing ensures maximum absorption and better results.
What to Know Before Applying Post-Emergent in Late Summer
Keep these tips in mind to get the most out of your application:
Match the product to the weed type
- Broadleaf formulas: dandelions, clover, plantain, etc.
- Grassy weed formulas: crabgrass, foxtails, etc.
Check the temperature
- Apply when it’s warm but not hot. Under 85°F is ideal.
Follow label directions exactly
- Use surfactants or watering-in steps if listed.
- Avoid over-application or applying during drought stress.
Get full coverage
- Spot-treat visible weeds.
- Use even coverage across infested areas.
Combine Pre- and Post-Emergent for Year-Round Weed Control
For the best long-term results:
- Use pre-emergent in early spring (and sometimes fall) to stop new weeds from sprouting.
- Apply post-emergent in late summer or when weeds are already visible.
This approach gives you both prevention and correction keeping your lawn healthier all year.
How Advanced Turf Care Handles Late-Summer Weed Control
At Advanced Turf Care, we specialize in tailored weed control for the Carolina climate.
- We recommend post-emergent in late summer to target actively growing weeds.
- Our trained technicians choose the right herbicide based on your weed types and lawn conditions.
- We combine this with professional fertilization and weed-and-feed strategies.
Our tailored lawn care program gives your turf a stronger defense against future weeds. Learn more about our weed control service
Ready to Reclaim Your Lawn?
In Greater Charlotte and surrounding areas, Advanced Turf Care delivers smarter late-summer weed control backed by experience and expert timing. Let us handle the application so your lawn stays green and weed-free. Call 704-800-5955 to schedule your treatment today. Want more info on what weeds you’re seeing? Check out the most common summer weeds in NC
