Prodiamine Application
for Lawns
Complete guide to using prodiamine pre-emergent herbicide for weed-free lawns.
Learn the exact timing, rates, and application methods used by lawn care professionals.
How Prodiamine Works
Prodiamine creates an invisible barrier in the soil that prevents weed seeds from germinating.
Here’s exactly how it protects your lawn.
Creates Barrier
Forms a protective chemical barrier in the top inch of soil that intercepts germinating weed seeds.
Blocks Germination
Prevents cell division in emerging seedlings, stopping weeds before they can establish.
Long-Lasting
Provides 6-8 months of continuous protection, covering the entire growing season.
Step-by-Step Application Guide
Follow these precise steps for maximum effectiveness and lawn safety.
1. Check Weather Conditions
Apply when no rain is forecast for 24 hours. Ideal temperature: 50-85°F with minimal wind.
2. Calibrate Your Spreader
Set your spreader according to manufacturer guidelines. Test on a small area first.
3. Apply Evenly
Use overlapping patterns. Walk at consistent speed. Apply half north-south, half east-west.
4. Water In
Apply 0.5 inches of water within 21 days to activate the barrier. Light irrigation works best.
Application Pattern
First Pass: North to South
Second Pass: East to West
Perfect Timing for Maximum Results
Timing is everything with pre-emergent herbicides. Apply too early or too late and you’ll miss the target weeds.
Regional Application Windows
🌨️ Northern States
Zones 3-6
First Application: Late March – Early April
Second Application: Late August – Early September
When forsythia blooms or soil temp hits 50°F
🌿 Transition Zone
Zones 6-8
First Application: Mid February – Mid March
Second Application: Late July – August
When soil temp reaches 50-55°F for 3 days
☀️ Southern States
Zones 8-11
First Application: January – February
Second Application: June – July
Before soil temp reaches 65°F consistently
🌡️ Soil Temperature Monitoring
Key Temperature Thresholds
55-60°F
45-50°F
65°F+
How to Check Soil Temperature
Use a soil thermometer 2-4 inches deep
Check temperature for 3 consecutive days
Monitor morning temperatures (6-8 AM)
Apply before reaching threshold temps
Recommended Prodiamine Products
Professional-grade products that lawn care experts trust.
Barricade 4FL
Professional Liquid
65% Prodiamine
Up to 87,000 sq ft
Tank mix
Prodiamine 65 WG
Water Dispersible Granule
65% Prodiamine
Up to 174,000 sq ft
Mix with water
Anderson’s Barricade
Granular Ready-to-Use
0.37% Prodiamine
5,000 sq ft
Spreader ready
Essential Equipment
Get the right tools for professional-quality application.
Application Equipment
Measuring Tools