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generic (Quali-Pro, PrimeraOne and others) · Liquid
Prodiamine 65 WDG
Season-long crabgrass prevention, sprayed
Prodiamine 65%
Fall pre-emergent
In your 2 gal tank0.37 oz wt0.18 oz wt per gallon · covers 1,000 sq ft
Whole lawn1.85 oz wt over 5,000 sq ft
Tanks to mix5.010 gal of water in total
0.37 oz wt per 1,000 sq ft (label range 0.18–0.83). A pound of powder covers a lawn for years, which is why enthusiasts leave granular pre-emergents behind for it. Blocks lawn seed too — do not use it in a season you plan to seed.
Label wants 0.5–1 gal of water per 1,000 sq ft — that puts a 2 gal tank at 2,000–4,000 sq ft.
- Measured by weight, not volume — this is a dry powder, so it wants a gram scale rather than a measuring cup.
- Needs ½ inch of rain or irrigation within 14 days or it stays on the surface.
- Keep off until dry.
- Annual cap by species: tall fescue 0.83, bluegrass and rye 0.55, fine fescue 0.42 oz by weight per 1,000 sq ft.
- Rates are per species and the annual cap is a hard ceiling. Not for putting greens or bentgrass mowed under half an inch.
- Read the label — it governs, not this page.
Jobs that call for it
Where this product shows up in the season — open a job for the full how-to.