How to apply pre-emergent herbicide?

Proper Pre-Emergent Application Methods

Correct application technique ensures pre-emergent herbicides create effective soil barriers for weed prevention. Application rate, equipment calibration, and activation through moisture are critical for success.

Application Equipment and Rates

Pre-emergents are applied as either granules or liquids. Each format requires specific equipment and calibration for proper coverage.

• Broadcast spreaders for granular formulations provide most uniform coverage
• Spray equipment for liquid pre-emergents requires proper calibration
• Follow label rates precisely—too little provides inadequate protection
• Excess application wastes product and risks crop damage
• Apply when wind is calm to prevent drift away from target area

Pre-Application and Post-Application Steps

1. Calibrate spreaders to verify application rate accuracy
2. Ensure lawn is free of surface debris for even coverage
3. Mow 2-3 days before application to optimal height
4. Apply when soil is dry but moist subsurface (after light rain ideal)
5. Water lightly after application to activate herbicide
6. Avoid heavy rain within 24 hours that might wash away product
7. Refrain from aeration for 30 days before or after application

Precise application and proper moisture ensure pre-emergent herbicides reach their full potential for season-long weed prevention.