Prodiamine 65 Wdg 5lbs Pre-emergent Grass Broadleaf Weeds (

The Verdict

If you’re tired of dropping $40+ on a tiny jug of name-brand Barricade, this 5-pound jug of Prodiamine 65 WDG is the grown-up move. It’s the same active ingredient (prodiamine at 65%) that the pros use, just without the marketing markup. At 4.7 stars from 235 buyers, this is one of the most consistently praised generics in the lawn care space. Here’s the real breakdown.

What’s in the jug

You get 5 pounds of wettable dispersible granules (WDG) in a foil-lined bag inside a sturdy jug. That’s enough for roughly 27,500 square feet at the standard 0.83 oz per 1,000 sq ft rate — or about 13,750 sq ft at the higher 1.5 oz rate for heavy crabgrass pressure. The math matters here: a typical 1-acre lawn needs about 3.6 pounds per application at the standard rate. This one jug covers you for a full season plus a fall split if you dose correctly.

Real-world mixing and application

WDG formulations are more forgiving than wettable powders, but they’re not foolproof. You’ll want to premix the granules in a small container with water before dumping into your sprayer. Add the product to water slowly while agitating. A few reviewers noted clumping issues when they rushed this step or used hot water from a hose-end sprayer. Use cool water, mix thoroughly, and you’ll get a clean suspension that won’t clog nozzles.

The product labels rates clearly, but there’s no scoop included. Invest in a cheap gram scale — you’ll need it for split applications. Many lawn care veterans run a spring application at 0.5-0.6 oz per 1,000 sq ft, then a follow-up in late summer at the same rate. This staggered approach extends control well into fall.

What buyers consistently praise

The cost-per-application math is the headline. One reviewer put it plainly: “Same chemical as the big brand, less than half the price. I’ve used it for three seasons and my lawn has never been cleaner.” Another noted, “The 5lb size means I don’t run out mid-season like I did with the 2.5lb jugs.”

Crabgrass control is where this product shines. Prodiamine is one of the most effective pre-emergents for crabgrass, foxtail, and annual bluegrass. Multiple reviewers mentioned that a single spring application held their lawn weed-free through September, even in hot Southern climates.

Where it falls short

Pre-emergents only work if they’re down before germination. Miss your window — typically when soil temps hit 55°F for three consecutive days — and you’ve wasted money. Also, this product must be watered in within 14 days of application. If you’re in a dry spell and can’t irrigate, you’re gambling. One reviewer learned this the hard way: “Applied in April, got two weeks of no rain, and my crabgrass came up anyway.”

The WDG formulation also means you need a sprayer, not a spreader. If you don’t own a backpack or pump sprayer, factor that into your total cost.

Who should buy this

This is for the lawn enthusiast who’s past the beginner stage. If you’re already tracking soil temps, using a sprayer, and understand split applications, this is a no-brainer value play. It’s also ideal for large properties where the 5-pound size saves you from buying multiple small jugs. Skip it if you’re a casual homeowner looking for a quick granular spread-and-go product — you’d be better served by a granular prodiamine product that works with a broadcast spreader.

Frequently asked questions

Can I use this on vegetable gardens? No. Prodiamine is for established turf and ornamental landscapes only. It will damage vegetable crops. Use a different pre-emergent for edible beds.

When exactly should I apply it? Apply when soil temperatures hit 55°F consistently in spring. For fall applications, aim 6-8 weeks before the first frost to catch winter annuals. Your local university extension office publishes soil temp data online.

How long does one jug last? At the standard rate, one 5-pound jug covers about 27,500 sq ft, which is roughly a half-acre to three-quarter-acre lawn depending on your split strategy. Most homeowners get 2-4 years from one jug.

The verdict

Buy it if: You want professional-grade crabgrass control at a fraction of the name-brand cost and don’t mind mixing your own spray. Skip it if: You lack a sprayer, can’t commit to watering in the product, or prefer set-and-forget granular applications.

This is the best cost-per-square-foot pre-emergent on the market for serious lawn care. 4.6/5 stars — deducted slightly for the missing scoop and the unforgiving watering-in requirement.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.