The mix rate varies by formula and the weeds you’re targeting. Concentrates in this category (lawn-safe, non-selective, brush control, and long-term preventer) use different amounts per gallon. To dial it in safely:

• Read the label and follow the mixing chart for your weed type and sprayer size.
• Measure accurately with a dedicated cup or syringe—don’t estimate.
• Mix only what you’ll use that day and agitate well.
• Calibrate your sprayer and apply on a dry, calm day.
• Never exceed label rates; more isn’t necessarily better.

If you’re unsure, start with the lowest labeled rate for spot treatments and adjust only as the label allows. Results can vary with temperature, weed maturity, and coverage.

If you want extended control, look for concentrates that combine a weed-and-grass killer plus a soil preventer. Some are labeled to help prevent regrowth for roughly a season (about 4 months), while others note control for up to 12 months. These products are typically non-selective, so avoid using them in areas you plan to seed or where roots of desirable plants may extend.

• Extended-preventer formulas: Treat existing growth and help block new weeds for months.
• Standard non-selective killers: Treat existing weeds only; no long-term prevention.
• Brush/vine formulas: Target tough, woody plants but may not provide long-term soil prevention.

Always match the label to your site and goals.

It depends on the specific formula. Non-selective concentrates will likely injure or kill bahiagrass if contacted. Lawn-focused formulas are designed to target weeds in turf and may list certain southern grasses as tolerant—but not all products are suitable for bahiagrass.

• Check the label for bahiagrass listed as a safe turf type.
• Spot-treat carefully and consider testing a small, inconspicuous area first.
• Apply under label-recommended temperatures with healthy turf and avoid overlapping spray.
• Keep kids and pets off the area until the spray has dried.

If bahiagrass isn’t listed as safe on the label, avoid use on that lawn.

Replanting timelines vary widely by product. Concentrates that include a soil preventer often require a months-long wait before planting or seeding (the exact interval is on the label). Standard non-selective formulas without a preventer may allow replanting sooner, sometimes after a shorter waiting period and once treated weeds have been removed.

• Read the replanting section of your product label for crop, seed, or ornamental timing.
• Avoid disturbing treated soil until the labeled interval passes.
• Plan ahead for seasonal planting if long-term prevention is used.

Because conditions and formulations differ, following the label is the safest guide.

Rainfast times differ by formula. Some concentrates become rainproof in as little as 30 minutes, while others may require a few hours. The exact timing is listed on your product’s label and can vary with temperature, humidity, and leaf wetness.

• Apply on a dry day with a suitable rain-free window as directed.
• Let the spray dry fully before irrigation, rain, or foot traffic.
• Avoid mowing until after the labeled rainfast period.
• If rain arrives early, check the label for guidance on whether a reapplication may be needed.

Results can vary based on coverage and weed maturity.