Winter Pre-Emergent

Stop weeds before they start with Lawn Synergy’s line of winter pre emergent fertilizers and herbicides. Applying a pre emergent in winter helps prevent cool-season weeds like poa annua, chickweed, and henbit from germinating when soil temperatures drop. Whether your lawn is warm or cool season, the right winter grass pre emergent keeps your lawn clean, uniform, and ready for strong spring growth.

Why Apply a Pre Emergent in Winter?

Winter is when many lawn weeds begin to germinate under the surface, long before you see them. A properly timed pre emergent for winter weeds forms a barrier in the soil that stops weed seeds from sprouting. Applying before the first extended cold period ensures maximum protection through late winter and early spring. Without it, you may find your lawn invaded by grassy and broadleaf weeds that compete for nutrients and ruin appearance.

What Weeds Does a Winter Pre Emergent Control?

Winter pre emergents target the most common cool-season weeds, including:

• Poa annua (annual bluegrass)
• Chickweed
• Henbit
• Bittercress
• Mustard weeds
• Crabgrass and goosegrass (when applied late winter in warm regions)

When to Apply Pre Emergent in Winter

Apply your winter pre emergent when soil temperatures are consistently between 50°F and 55°F, typically from late October through December in most regions. For warm-season lawns in the Southeast or Gulf states, a November application offers protection through early spring. Always water in the product after spreading to activate the soil barrier.

Our Winter Pre Emergent Products

Guardian 13-0-10

Guardian 13-0-10 combines pre-emergent weed control with essential nutrients to strengthen turf during cooler months. It contains prodiamine for long-lasting prevention of poa annua and other winter weeds, plus nitrogen and potassium to support root health and color retention through winter. Perfect for lawns that need feeding and protection in one application.

Safeguard 0-0-7

Safeguard 0-0-7 provides powerful pre-emergent protection without added nitrogen. It’s ideal for dormant lawns or areas where you want to prevent winter weeds without stimulating growth. Safe for use on both warm and cool-season grasses, Safeguard delivers reliable barrier control against annual bluegrass, chickweed, and other cool-season invaders.

Specticle

Specticle offers professional-grade winter grass pre emergent control for warm-season lawns such as Bermuda, Zoysia, and St. Augustine. Its advanced active ingredient (indaziflam) provides extended protection — often up to six months — against tough grassy and broadleaf weeds. Use Specticle in fall or early winter to ensure a weed-free lawn well into spring.

How to Apply Winter Pre Emergent

Spread evenly across the turf using a calibrated broadcast spreader. Water the area with at least 0.25 inches of irrigation immediately after application to activate the pre-emergent barrier. Avoid disturbing the soil surface after watering, as breaking the barrier reduces effectiveness. Reapply in early spring if recommended for your region or if heavy rainfall has occurred.

Protect Your Lawn All Winter Long

Choosing the right winter pre emergent ensures your lawn stays free of weeds, even when growth slows. Guardian 13-0-10 and Safeguard 0-0-7 deliver season-long protection with or without added nitrogen, while Specticle offers unmatched coverage for warm-season turf. Apply before winter weeds germinate to maintain a clean, healthy foundation for spring green-up.