Quali-Pro Prodiamine Pre-Emergent Herbicide, 5 lb Yellow Granules — 65% WDG for Long-Lasting Turf & Landscape Weed Prevention

Quali-Pro Prodiamine 5 lb is a pre-emergent herbicide formulated to prevent a wide range of annual grassy and broadleaf weeds before they sprout.

Designed for professional and homeowner turf care, Quali-Pro Prodiamine 65 WDG (water-dispersible granule) lays down a durable barrier in soil to stop weed seedlings from establishing. Its active ingredient, prodiamine 65%, provides flexible spring or fall application windows and mixes well with common fertilizers and iron products. This 5-pound package is sized for landscape beds, turf areas, golf course roughs, and tree/shrub settings where early-season prevention is preferred over post-emergent control.

How does this product prevent weeds?

Prodiamine works by creating a chemical barrier at the soil surface that interrupts root and shoot development of newly germinated weed seeds. It doesn’t kill established weeds; instead it prevents their emergence, which reduces the need for repeat spot treatments later in the season.

• Forms a residual layer in the upper soil where seeds germinate.
• Targets both annual grasses (like crabgrass and foxtail) and common broadleaf seedlings.
• Provides longer-lasting control when applied at recommended rates.

When should I apply Quali-Pro Prodiamine to get best results?

Timing depends on the target species and local climate: apply in early spring before soil temperatures trigger seed germination, or in fall to control cool-season annuals. Avoid application after weeds have emerged; for post-emergent problems use an appropriate herbicide labeled for that use.

• Spring: before soils consistently reach the germination threshold for crabgrass.
• Fall: to suppress winter annuals such as annual bluegrass and chickweed.
• Follow label for interval reapplications and irrigation requirements.

How do I mix and apply the granules safely and effectively?

This product is a water-dispersible granule that can be mixed into spray tanks or applied with spreaders labeled for dry granules when allowed. Proper calibration, personal protective equipment, and adherence to label rates ensure consistent coverage and reduce risk to desirable plants and the environment.

• Measure and mix per label directions using clean water and adequate agitation.
• Use a push spreader or broadcast sprayer calibrated for the 5 lb coverage rate.
• Irrigate lightly if label specifies to activate the herbicide into the soil.

Which weeds and sites are best suited for this product?

Quali-Pro Prodiamine 65 WDG controls many common annuals found in turf and landscaped areas when used according to label instructions. It is formulated for use on turfgrass, landscapes, tree and shrub plantings, and golf course areas where pre-emergent programs are standard practice.

• Effective on crabgrass, annual bluegrass (Poa annua), foxtail, goosegrass.
• Also suppresses henbit, knotweed, chickweed, spurge and similar seedlings.
• Use across lawns, commercial landscapes, nursery beds, and golf course sites.

Who this is for: Quali-Pro Prodiamine 5 lb is aimed at turf managers, landscape contractors, and proactive homeowners who prefer prevention over repeated spot treatments. If you manage lawns, golf course areas, or landscape beds and want a tank-mix-compatible pre-emergent with a professional-strength active ingredient, this product offers an efficient option when applied according to label directions.