David Grays Blockade Winter Grass Killer 125g – Selective Pre & Post-Emergent Herbicide for Lawns

David Grays Blockade Winter Grass Killer for Established Lawns

Maintain a well-presented lawn with David Grays Blockade Winter Grass Killer 125g, a selective herbicide formulated to control winter grass (Poa annua) in approved turf varieties. Its Propyzamide-based formula works through the root zone, providing targeted winter grass treatment for established lawns.

Suitable for common couch lawns across Australia and buffalo lawns in Western Australia, as directed on the label, this winter grass killer offers a practical solution for seasonal lawn maintenance.

Pre- and Post-Emergent Winter Grass Control

Featuring dual-action herbicide technology, Blockade targets winter grass during germination and after emergence. Its soil-active formula helps control existing plants while reducing further winter grass establishment.

With manufacturer-stated residual activity of up to eight weeks, this pre-emergent herbicide for winter grass supports ongoing weed management when applied under suitable conditions.

Effective Winter Grass Treatment with Convenient Coverage

The 125g pack offers convenient coverage for home lawn treatment, with the manufacturer stating that it can treat over 200m² when used as directed. Follow the approved application rate, watering instructions and seasonal treatment requirements for your lawn type.

Product Details

Specifications

Key Features

• Pre- and Post-Emergent Action: Targets winter grass during germination and after emergence.
• Propyzamide 100g/kg: Selective herbicide formulation for approved established turf.
• Residual Weed Control: Provides up to eight weeks of manufacturer-stated soil activity under suitable conditions.
• Seasonal Treatment: Designed for winter grass control during the cooler growing period.
• Convenient 125g Pack: Suitable for measured preparation and lawn-area treatment according to label directions.
• Established Lawn Application: Designed for specified turf varieties, subject to state-specific restrictions.

How to Use

1. Confirm Lawn Compatibility: Identify winter grass (Poa annua) and ensure your established lawn variety is approved for treatment. Follow state-specific label restrictions.
2. Select the Application Time: Apply during the recommended seasonal treatment period when winter grass is actively growing and weather conditions meet the label requirements.
3. Prepare the Herbicide: Measure and dilute the winter grass killer according to the approved application rate. Wear the protective equipment specified on the label.
4. Spray the Treatment Area: Apply evenly using a suitable garden sprayer, following the labelled coverage and application directions.
5. Water in the Herbicide: Irrigate the treated area according to the manufacturer's instructions to move the active ingredient into the root zone.
6. Monitor Treatment Results: Allow the recommended time for winter grass control and follow the product label before any further treatment or lawn reseeding.

FAQs

Can I use David Grays Blockade Winter Grass Killer on buffalo grass?

The available label directions permit use on established buffalo grass in Western Australia only. For buffalo lawns in other states, choose a winter grass herbicide approved for your location and turf variety.

Will David Grays Blockade kill mature winter grass that has already flowered?

Blockade has post-emergent activity against established winter grass. However, mature or late-season weeds may take longer to respond, and treatment is generally more effective before extensive flowering and seed production.

Is David Grays Blockade suitable for Kikuyu or Queensland Blue Couch lawns?

Blockade is not recommended for Kikuyu lawns. Queensland Blue Couch has separate treatment directions in available product information, so check the current approved label before application.

Is one 125g pack enough to treat a 200m² lawn?

The manufacturer states that a 125g pack treats over 200m² when used as directed. Measure your lawn area and follow the approved label's application rate to determine the quantity required.

How long does David Grays Blockade take to control existing winter grass?

Existing winter grass generally responds within two to three weeks, according to the manufacturer. Mature weeds or late-season applications may take longer.

Does Blockade Winter Grass Killer need watering after spraying?

Yes. Blockade requires irrigation to move Propyzamide into the root zone. Follow the product label for the specified watering amount and timing.

How long should I wait before reseeding my lawn after using Blockade?

The available product directions specify waiting at least 60 days before reseeding. Always confirm this restriction against the current approved label before planting new grass.