• David Grays Wintergrass Killer 125g – selective herbicide safe on Buffalo and Couch lawns
  • David Grays Wintergrass Killer back label showing application rate 60g per 10L water and lawn type compatibility
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David Grays

David Grays Winter Grass Killer 125g | Selective Herbicide for Buffalo & Couch

David Grays Winter Grass Killer 125g | Selective Herbicide for Buffalo & Couch

$19.95
$19.95
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Winter Grass Killer 125g – Selective Winter Grass Control for Couch & Buffalo Lawns

Winter Grass Killer 125g is a highly effective selective herbicide designed to target and eliminate winter grass in home lawns. Powered by the proven active constituent Propyzamide, this product allows you to treat your entire lawn safely, removing winter grass without harming established Couch or Buffalo turf.

Winter grass is a fast‑spreading annual weed that germinates in Autumn and can quickly take over your lawn if left untreated. Winter grass Killer stops the weed at its most vulnerable stage, preventing spread, reproduction, and seed development.

Key Features

  • Best applied during Autumn and Winter Targets winter grass right as it germinates for maximum effectiveness.
  • Active constituent: Propyzamide A trusted winter grass herbicide used across residential and professional turf.
  • Selective winter grass control Safe to apply across your whole lawn - kills winter grass without damaging:
    • Couch (Green Couch / Bermuda Grass)
    • Buffalo Grass
  • Not suitable for cool‑season grasses DO NOT use on Kentucky Bluegrass, ryegrass, fescue, or bent grass lawns.
  • Stunts and stops winter grass growth Prevents spread and reproduction by halting development of germinating seeds.
  • Covers approximately 200 m² Ideal for most residential lawn sizes.

Application Rate

60 g in 10 L of water per 100 m²

How Winter grass Killer Works

Winter grass Killer uses Propyzamide to stunt the growth of winter grass, particularly the newly germinating seeds emerging in Autumn. Once growth is halted, winter grass cannot spread or reproduce, allowing your Couch or Buffalo lawn to maintain density and appearance throughout the cooler months.

Essential Watering Requirements

To activate the herbicide and ensure lethal uptake:

  • Water in thoroughly with 12–25 mm of irrigation or rainfall immediately after application.
  • This moves the product into the soil where germinating winter grass seeds absorb it.
  • Heavier infestations may require 2–3 applications, spaced several weeks apart.

Important Usage Guidelines

  • Do not mow turf 2 days before or after application.
  • Do not spray if rain is likely within 4 hours.
  • Do not spray weeds wet from dew or rain.
  • Avoid spraying weeds under stress (heat, waterlogging, drought).
  • Keep domestic animals off treated areas until the product has dried.

David Grays Wintergrass Killer Instructions

Download David Grays Wintergrass Killer Instructions (PDF)

David Grays Wintergrass Killer SDS

Download David Grays Wintergrass Killer SDS (PDF)

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Frequently Asked Questions

What is David Grays Winter Grass Killer used for?

David Grays Winter Grass Killer is a selective herbicide designed to control annual winter grasses in lawns, particularly species such as winter grass (Poa annua). It is commonly used in couch, buffalo, and other established turf types to maintain a clean, uniform lawn.

How does David Grays Winter Grass Killer work?

It works by being absorbed through the leaves and roots of target winter grass plants, disrupting their growth and preventing them from developing further. The treated weeds gradually stop growing, discolour, and die off over time while the surrounding turf remains unaffected when used correctly.

When is the best time to apply Winter Grass Killer?

The best time to apply David Grays Winter Grass Killer is during active growth of winter grass, typically in cooler months when weeds are young and actively developing. Early application provides the most effective control before seed heads form.

How long does it take to see results?

Visible results usually appear within 1 to 3 weeks after application, depending on weather conditions, weed maturity, and application timing. A follow-up application may be needed for heavy infestations.

How should David Grays Winter Grass Killer be applied?

It should be applied as a diluted spray using calibrated spraying equipment, ensuring even coverage over affected lawn areas. For best results, avoid mowing for a few days before and after application and apply when weeds are actively growing.

What is the active ingredient in David Grays Winter Grass Killer?

The active constituent is Propyzamide. It works by disrupting the growth of winter grass at the root and germinating seed stage, which is why it needs to be watered into the soil after application to be fully effective.

Do I need to water it in after applying?

Yes. Unlike a typical foliar spray, this product needs to be watered into the soil to reach germinating seed — apply 12–25mm of irrigation (or equivalent rainfall) straight after spraying for best results.

Will one application get rid of my winter grass completely?

Not always. Heavier infestations may need 2–3 applications spaced several weeks apart for full control, especially if the weed has already spread through a large area of the lawn.

Is it safe for all lawn types?

It's safe on established Couch and Buffalo lawns, but it's not suitable for Kentucky Bluegrass, ryegrass, fescue or bent grass — always check your lawn type before applying.