
Princep Liquid (Simazine) Herbicide
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š± PrincepĀ® Liquid Herbicide ā Professional Pre-Emergent Weed Control
PrincepĀ® Liquid is a commercial-grade pre-emergent herbicide powered by Simazine, designed to provide long-lasting control of annual grassy and broadleaf weeds in warm-season turfgrass. It works through the soil to stop weeds before they emerge, helping you maintain a cleaner, thicker, healthier lawn.
Formulated for professional applicators and serious DIY homeowners, PrincepĀ® delivers reliable season-long protection when applied correctly.
ā Approved Turf Types (Warm-Season Only)
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Bermudagrass
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Centipedegrass
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St. Augustinegrass
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Zoysiagrass
ā Not for cool-season grasses or golf greens.
š Application Rates by Turf Type
| Use Area | Turf Type | Rate Per Acre | Rate Per 1,000 sq ft | Timing |
|---|---|---|---|---|
| Lawns / Fairways | Bermuda, Centipede, St. Augustine, Zoysia | 1ā2 qt | 0.75ā1.5 fl oz | Fall or Late Winter |
| Annual Bluegrass Control | Same as above | 1 qt | 0.75 fl oz | Fall |
| Sod Production (Florida) | Warm-season turf | 2ā4 qt | N/A | After sprigging |
| Sod Production (Other States) | Warm-season turf | 1ā2 qt | N/A | After establishment |
Always follow annual maximum limits and regional restrictions.
ā± Best Application Timing
Fall Applications
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Apply after September 1 (October 1 for annual bluegrass)
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Controls winter weeds like chickweed, henbit, spurweed, and bluegrass
Late Winter Applications
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Apply before summer weeds emerge
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Controls crabgrass, goosegrass, foxtail, and more
Watering
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Irrigate with ½ inch of water if no rainfall occurs within 10 days
Ā
š§ Mixing Instructions (Quick Guide)
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Fill sprayer ¼ full with clean water
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Start agitation
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Add PrincepĀ® Liquid
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Fill tank to 90%
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Add compatible products (if tank mixing)
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Finish filling and maintain agitation
Keep sprayer clean and well-agitated during application.
š Application Methods
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Ground sprayers only (no aerial use)
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Minimum 15ā20 gallons per acre
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Calibrate sprayer before use
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Do not apply through irrigation systems
ā ļø Safety & Handling
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Wear long sleeves, gloves, pants, and shoes
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Avoid skin and eye contact
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Keep pets and children off until dry
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Wash hands after use
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Follow all PPE requirements
š« Important Use Restrictions
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Warm-season turf only
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Not for use in HI, AK, or U.S. territories
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Do not use on golf greens
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Do not overseed 4 months before or 6 months after application
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Do not exceed annual maximum rates
ā Why Choose PrincepĀ® Liquid?
ā Professional-grade pre-emergent control
ā Long residual weed prevention
ā Excellent for southern lawns
ā Proven Simazine performance
ā Trusted by turf professionals
If youāre serious about preventing weeds before they start, PrincepĀ® Liquid is a proven, reliable solution for warm-season turf.
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