Pre-Emergent vs. Post-Emergent: Sherman TX

Michael Watrous
February 17, 2026
5 min read

Pre-Emergent vs. Post-Emergent Weed Control in Sherman, Texas

When homeowners search for "lawn care near me" in Sherman, they are usually at their wit's end. The grass is thinning, the weeds are winning, and mowing alone isn't cutting it.

One of the biggest sources of frustration is the confusion between pre-emergent and post-emergent weed control. Using the wrong one—or missing the window entirely—is why many lawns in Grayson County struggle year after year.

The Quick Breakdown: Prevention vs. Cure

  • Pre-Emergent: Prevents weed seeds from sprouting. It's a "shield" for your soil.
  • Post-Emergent: Kills weeds that you can already see. It's the "medicine" for an existing problem.

What is Pre-Emergent Weed Control?

Pre-emergent works below the surface. It creates a chemical barrier in the soil that interrupts the germination process of weed seeds.

Why It’s Critical for Sherman Lawns:

Sherman’s heavy clay soil retains heat differently than sandy soils. Once the ground hits a certain temperature (usually around 55°F), weed seeds like Crabgrass begin to wake up.

  • The Barrier: If the pre-emergent isn't already in place, the seeds sprout, and the opportunity for prevention is lost.
  • Timing: In Sherman, this usually means applications in late February and again in September to catch fall-germinating weeds like Poa Annua.

What is Post-Emergent Weed Control?

Post-emergent is what you use when the "battle" has already begun. These products are absorbed through the leaves or the root system of a weed that is actively growing.

When to Use It in Sherman:

  • When pre-emergent windows were missed.
  • To target "escapes" (stubborn weeds that broke through the barrier).
  • In newer Sherman developments where the soil is disturbed and weed pressure is high.

Pre-Emergent vs. Post-Emergent: Comparison

FeaturePre-EmergentPost-EmergentPrimary GoalPreventionEliminationApplication TimingBefore weeds appearAfter weeds appearVisible ResultYou see fewer weeds laterYou see dead weeds nowSherman StrategyEssential for Crabgrass/HenbitEssential for Dandelions/Dallisgrass

Why Sherman Lawns Need Both

Relying on only one treatment is a recipe for an inconsistent lawn.

  1. The Shield: Pre-emergent reduces the sheer volume of weeds that can even start.
  2. The Sword: Post-emergent cleans up the few tough survivors.
  3. The Support: Professional fertilization thickens the grass so that there’s no room left for seeds to even touch the soil.

FAQ: Weed Control Timing in North Texas

When should I apply pre-emergent in Sherman, TX?

Timing depends on soil temperature, not the calendar. However, usually, your first application should be down by March 1st, and your fall application by October 1st.

Can I skip pre-emergent if I have a lot of weeds now?

No. If you have weeds now, you need post-emergent to kill them, but you still need pre-emergent to stop the next wave of seeds from taking their place.

Does mowing help with weed control?

Mowing keeps your lawn looking tidy, but it doesn't kill the root. In fact, mowing a weed that has gone to seed can actually spread that seed across your entire Sherman property.

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