Ortho

Brush-B-Gon Brush Killer

Woody brush and lawn weed killer · US · manufacturer-sourced

Check your container: This countdown is for the Woody brush and lawn weed killer variant. Similar-looking versions may have different times.

How long before you can put Ortho Brush-B-Gon Brush Killer back into service?

Short answer

Return to service: 7 days after application.
Rain-safe: 2–6 hours after application.
Lawn and garden treatments

Application-and-reentry plan

Rainfast time and re-entry time answer different questions

  1. Apply the Woody brush and lawn weed killer per the label
  2. Keep people and pets out for the stated time
  3. Hold off watering or mowing until the label says

This product’s stated stages Quoted at 73°F

  • Rain-ready2–6 hours
  • Return to service7 days

Worth noticing: Rain-ready at 2–6 hours; return to service at 7 days.

Common mistake: Treating rainfast time as re-entry time.

Lawn and garden treatments

Treatment safety gate

Elapsed time is only one condition for the next action

Time alone does not clear the next step

Rainfast time is not people/pet re-entry time. Follow the current label for each question separately.

Exact version
Woody brush and lawn weed killer
Intended use
brush, poison ivy, and lawn weeds

Time re-entry and rainfast

When did you apply it?

Stated times

  • Return to service7 days
  • Rain-safe2–6 hours

From Ortho data sheet · checked 2026-10-25. Anything not listed isn’t stated by the manufacturer.

Manufacturer website: ortho.com

Conditions & fine print
  • Stated conditions: 73°F (23°C)
  • Pesticide labels are legal documents and change. Read and follow the label on the container you hold, including re-entry and harvest limits.
  • Apply at 90°F or below
  • Region US. Formulas can differ between countries; check your container.
  • Return to service: The source gives no conditions for this time.
  • Rain-safe: The source gives no conditions for this time.
  • Entered from the cited manufacturer documentation. Check the current label for the exact formula and region. Report outdated information
  • Actual results depend on preparation, thickness, ventilation, temperature, humidity, mixing and substrate.

Confirm this is your product

Closely named formulas, colors and regional versions can use different times. Match these details to your container before starting a countdown.

Exact listing
Ortho Brush-B-Gon Brush Killer
Variant
Woody brush and lawn weed killer
Region
US
Listed use
brush, poison ivy, lawn weeds
Timed stages recorded
return service, rain ready
Source checked
2026-10-25

Documentation: Technical data sheet · EPA Reg. No. 239-2491, accepted February 11, 2015

Condition attached to the stated time: The source gives no conditions for this time.

About this product

A label with two rain times in one product: 2 hours for brush use and 6 hours for lawn use. Wilting or yellowing takes 2 to 6 weeks on brush, and bare lawn spots can be seeded 1 week after application. The label bars lawn application above 90°F.

Using this specific product

Ortho Brush-B-Gon Brush Killer is listed here as the Woody brush and lawn weed killer version for brush, poison ivy, and lawn weeds. For treating a lawn or garden area, the useful question is not simply whether the surface looks finished—it is whether the exact next-action milestone shown above has been reached.

Before you start

  • Confirm the package says Woody brush and lawn weed killer; related versions can use different timing.
  • For brush, poison ivy, and lawn weeds, pay particular attention to wind, dry foliage, application rate and forecast.
  • The source gives no conditions for this time.

How to check readiness

Use the rainfast claim only for rain; use the label separately for people and pet re-entry. For lawn use the label says bare spots can be planted with grass seed 1 week after application. Use this only as the rainfast milestone. It does not establish general cure or re-entry safety.

Avoid this mistake

Rainfast does not mean dry, harmless or ready for people and pets.

Compare with similar products

Keep going

Questions

How long before you can put this product back into service?

Ortho states: For lawn use the label says bare spots can be planted with grass seed 1 week after application. Conditions: The source gives no conditions for this time.. The label says rain 2 hours after application will not reduce effectiveness on brush, and rain or watering 6 hours after will not wash it away on lawn. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

Why does Brush-B-Gon give 2 hours and 6 hours for rain?

The label gives 2 hours for brush use and 6 hours for lawn use. Visible results take 2 to 6 weeks on brush, and bare lawn spots can be seeded after 1 week.

How long before this product can get rained on?

Ortho states: The label says rain 2 hours after application will not reduce effectiveness on brush, and rain or watering 6 hours after will not wash it away on lawn. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

What affects how long this product takes to dry or cure?

Pesticide labels are legal documents and change. Read and follow the label on the container you hold, including re-entry and harvest limits. Follow the product label for your conditions.

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