Hi-Yield

Super Concentrate Killzall 4+ Weed & Grass Killer

Glyphosate concentrate · US · manufacturer-sourced

Check your container: This countdown is for the Glyphosate concentrate variant. Similar-looking versions may have different times.

How long before you can put Hi-Yield Super Concentrate Killzall 4+ Weed & Grass Killer back into service?

Short answer

Return to service: 4 hours after application.
Curing period complete: 56 days after application.
Lawn and garden treatments

Application-and-reentry plan

Rainfast time and re-entry time answer different questions

  1. Apply the Glyphosate concentrate 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

  • Return to service4 hours
  • Curing period8 weeks

Worth noticing: Return to service at 4 hours; curing period at 8 weeks.

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
Glyphosate concentrate
Intended use
weeds, grass, and non-crop areas

Time re-entry and rainfast

When did you apply it?

Stated times

  • Return to service4 hours
  • Curing period complete56 days

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

Manufacturer website: None

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.
  • Region US. Formulas can differ between countries; check your container.
  • Return to service: The source gives no conditions for this time.
  • Curing period complete: 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 Report outdated information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
Hi-Yield Super Concentrate Killzall 4+ Weed & Grass Killer
Variant
Glyphosate concentrate
Region
US
Listed use
weeds, grass, non-crop areas
Timed stages recorded
return service, cure period
Source checked
2026-10-25

Documentation: Technical data sheet · EPA registration date September 16, 2016

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

About this product

A glyphosate concentrate whose label gives no rainfast hours, only that heavy rain soon after application may wash it off and a repeat may be needed. The long number is 8 weeks before treated vegetation can be harvested or fed after broadcast treatments.

Using this specific product

Hi-Yield Super Concentrate Killzall 4+ Weed & Grass Killer is listed here as the Glyphosate concentrate version for weeds, grass, and non-crop areas. 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 Glyphosate concentrate; related versions can use different timing.
  • For weeds, grass, and non-crop areas, 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 agricultural uses the label sets a restricted entry interval of 4 hours; for non-agricultural uses people and pets stay off until the spray has dried. After broadcast postemergent treatments the label says not to harvest or feed treated vegetation for 8 weeks.

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?

Hi-Yield states: For agricultural uses the label sets a restricted entry interval of 4 hours; for non-agricultural uses people and pets stay off until the spray has dried. Conditions: The source gives no conditions for this time.. After broadcast postemergent treatments the label says not to harvest or feed treated vegetation for 8 weeks. Conditions: The source gives no conditions for this time.. These are the manufacturer’s stated times, not a guarantee.

Does Killzall 4+ say how long until rain is safe?

No number. The label says heavy rainfall soon after application may wash it off the foliage and a repeat application may be required.

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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