How to Apply Prodiamine — Granular & Liquid WDG Guide

Which Prodiamine do you have?

Application rates and instructions differ by format. Jump to yours:

Granular (0-0-7) — In stock Liquid (65 WDG) — V2 in development

Prodiamine is the same active ingredient used by lawn-care pros to stop crabgrass and other weeds before they germinate. It comes in two formats — granular (apply with a spreader) and liquid WDG concentrate (mix and spray) — and the rates differ between them. This guide covers both.

Choose Granular if you already own a spreader and want the simplest application — no measuring or mixing required.

Choose Liquid WDG if you own a backpack or pump sprayer and want to dial in the application rate by season.

Both formats deliver the same season-long crabgrass prevention. If you don't have a strong preference, granular is the lower-friction option for most homeowners. Download our free app (iOS) or Android and we'll tell you exactly when to apply based on your local soil temperature.

How to Apply Prodiamine Granular (0-0-7)

Application Rate: 3 lbs per 1,000 sq ft

Coverage: The 18 lb bag covers 6,000 sq ft; the 45 lb bag covers 15,000 sq ft.

When to Apply: In spring or fall, when soil temperatures are between 55°F and 70°F. For crabgrass, apply twice in spring.

Step-by-Step

  1. Measure your lawn. Calculate the square footage of the area you'll treat. An 18 lb bag covers approximately 6,000 sq ft at the standard rate.
  2. Set your spreader. Use the spreader setting on the back of the bag label for your spreader model (Scotts, Earthway, Lesco, etc.).
  3. Apply in a crossing pattern. Walk half the area north-to-south, the other half east-to-west, to ensure even coverage. Avoid overlapping.
  4. Water in within 48 hours. Apply ½" of irrigation, or wait for rainfall, within 48 hours of application. This activates the pre-emergent barrier in the top layer of soil.

Important: Do NOT apply if you're seeding or overseeding — Prodiamine prevents new seed from germinating.

Ready to apply? Shop Yard Mastery Prodiamine Granular 0-0-7. Free shipping on most orders.

How to Apply Prodiamine 65 WDG (Liquid)

A note on availability:

We're not currently stocking Prodiamine 65 WDG. Our new, improved formulation is in development. Subscribe to our weekly newsletter and we'll let you know when it's back.

If you need WDG today, you can find it at retailers like DoMyOwn. If you'd rather not wait, our granular Prodiamine 0-0-7 uses the same active ingredient — different application method, same crabgrass prevention.

The rest of this guide still covers WDG mixing rates and application so you have the reference whenever you need it.

Prodiamine 65 WDG is a professional formulation and can be mixed in several different concentrations depending on your grass type, approach, and how long you want the application to last. The 5 oz bottle is sized specifically for DIYers managing one lawn. Below are rates based on our strategy created for DIYers — the label allows for different application amounts based on grass type, so find yours below.

Prodiamine WDG Application Rates

Tall Fescue, Bermuda, St Augustine, Centipede, Zoysia, and Bahia Grasses

Early Spring as soil temps approach 55°F

.183oz / 5.2g per 1,000 sq ft

Mid Spring as soil temps cross 65°F heading to 70°F

.183oz / 5.2g per 1,000 sq ft

Fall as soil temps fall to 70°F coming out of summer

.46oz / 13g per 1,000 sq ft

Total = .83oz / 23.5g per 1,000 sq ft per year

These dosages are to be mixed in 1 gallon of water to make a spray mix. This mix should then be evenly applied across 1,000 sq ft of lawn area. Water in with ½" of water within 24 hours.

Measuring Prodiamine WDG concentrate on a digital gram scale

Kentucky Bluegrass, Ryegrass

Early Spring as soil temps approach 55°F

.183oz / 5.2g per 1,000 sq ft

Mid Spring as soil temps cross 65°F heading to 70°F

.183oz / 5.2g per 1,000 sq ft

Fall as soil temps fall to 70°F coming out of summer

.183oz / 5.2g per 1,000 sq ft

Total = .55oz / 15.6g per 1,000 sq ft per year

These dosages are to be mixed in 1 gallon of water to make a spray mix. Apply evenly across 1,000 sq ft. Water in with ½" within 24 hours.

The reason KBG and Ryegrass have fewer "pounds on the ground" yearly than warm-season grasses and turf-type tall fescue is that the label requires it. The label allows more for grasses grown further south and into the transition zone since their seasons are longer. If your lawn is a mix of KBG, Rye, and Tall Fescue, you can choose to use the greater application amounts if you think you need them.

Prodiamine WDG Coverage Per Year

Tall Fescue, Bermuda, St Augustine, Centipede, Zoysia, and Bahia Grasses

Following the rates above, you'll use .83oz or 23.5g per 1,000 sq ft per year. The 5 oz / 141.7g bottle covers 6,000 sq ft for one full season (2 spring applications + 1 fall application). Math: 5 ÷ .83 = 6.02; 141.7 ÷ 23.5 = 6.02.

Kentucky Bluegrass, Ryegrass

You'll use .55oz / 15.6g per 1,000 sq ft per year. The 5 oz / 141.7g bottle covers 9,000 sq ft for one full season. Math: 5 ÷ .55 = 9.09; 141.7 ÷ 15.6 = 9.09.

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