Prodiamine 4L Herbicide - 2.5 Gallon

Prodiamine 4L – Professional Pre-Emergent Weed Control

Prodiamine 4L is a professional-grade pre-emergent herbicide designed to stop crabgrass, goosegrass, Poa annua, and other annual weeds before they ever emerge. This liquid formulation creates a long-lasting barrier in the soil, making it one of the most trusted tools used by lawn care professionals and serious DIY homeowners.

When applied at the proper time and rate, Prodiamine 4L delivers season-long weed prevention for both warm-season and cool-season turf.

Based on label directions and rate tables

Why Choose Prodiamine 4L?

✔ Prevents weeds before they sprout
✔ Controls crabgrass, goosegrass, Poa annua, and more
✔ Long residual control (up to 6+ months)
✔ Professional liquid formulation
✔ Works on warm- and cool-season grasses
✔ Ideal for homeowners, sports turf, and lawn professionals

Turf Types & Maximum Application Rates

Annual Maximum Rates (Per 1,000 sq ft)

✅ Multiple applications are allowed per year as long as you do not exceed the yearly maximum.

When to Apply

🌱 Spring Application (Crabgrass Prevention)

• Apply when soil temps reach ~50°F

• Typically late winter to early spring

• Must be applied before weeds germinate

🍂 Fall Application (Extended Control)

• Used in cool-season areas

• Helps prevent early spring weed pressure

💧 Activation Required

• Water in with 0.5 inches of irrigation or rainfall within 14 days

• This activates the weed barrier in the soil

Application Method

• Use a calibrated backpack, handheld, or boom sprayer

• Apply in at least 0.5 gallons of water per 1,000 sq ft

• Spray evenly for full coverage

• Do not disturb soil after application

Mixing Instructions (Sprayer Tank)

1. Fill tank ¼ full with clean water

2. Start agitation

3. Add measured Prodiamine 4L

4. Continue agitation while filling tank

5. Maintain agitation during spraying

6. Apply immediately after mixing

💡 Tip: Adding spray dye helps avoid skips and overlaps.

Overseeding Restrictions

• Wait 60 days after seeding or until after the second mowing

• Applying too soon can prevent grass seed from establishing

Safety & Handling

⚠️ Always follow the label

• Wear long sleeves, gloves, and eye protection

• Avoid skin and eye contact

• Keep away from children and pets

• Do not apply near water

• Do not apply to golf putting greens

• Do not exceed 48 fl oz per acre per year

Best For

✔ Homeowners who want professional results
✔ Preventing crabgrass and Poa annua
✔ Lawns, athletic fields, and sod areas
✔ Long-term weed prevention programs