Summer Weeds Are Taking Over Florida Lawns — Here's How to Fight Back

August is peak weed season in Hillsborough County. The combination of intense heat and near-daily afternoon rain creates ideal conditions for aggressive weed growth — and if you've noticed your lawn looking more invaded than usual lately, you're not alone.

The most common culprits showing up in Tampa Bay lawns this time of year are crabgrass, dollarweed, chamberbise, and nutsedge. Each thrives in Florida's summer conditions and can spread rapidly through turf that's stressed, thin, or inconsistently maintained.

One of the best defenses against weeds is simple: keep your grass at the right height. Taller grass shades the soil and makes it harder for weed seeds to germinate. For St. Augustine, that means 3.5 to 4 inches. Bermuda should stay between 1 and 1.5 inches. Zoysia works best at 2 to 2.5 inches. Scalping your lawn in the summer heat is a fast track to a weed problem.

If you're thinking about herbicides, August is too late for pre-emergent treatments — those work before weeds sprout, and that window has passed. At this point, post-emergent spot treatments are the right approach. The key is using the right product for your specific grass type and weed species, which is where professional knowledge makes a real difference.

Large infestations, persistent weeds despite treatment, or any situation where you're unsure which chemical to apply are all good reasons to call a professional. The wrong herbicide on the wrong grass type can do more damage than the weeds themselves.

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