Prodiamine WDG - 5oz - how to mix and apply. This is a professional formulation of prodiamine pre-emergent and therefore can be mixed in several different concentrations depending on your grass type, approach and how long you want the application to last. We had these small bottles of prodiamine produced specifically for DIYers who are only managing one lawn. 

Below are instructions based on our strategy created for DIYers. The label allows for different application amounts based on grass type, please find yours below.

Be sure to download our FREE app and we will tell you exactly when to apply based on your exact soil temperature:

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Prodiamine WDG Application Rates

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

Early Spring as soil temps approach 55F

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


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

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


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

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


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


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.


Kentucky Bluegrass, Ryegrass

Early Spring as soil temps approach 55F

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


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

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


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

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


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


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.


The reason that the grasses KBG and Rye have fewer “pounds on the ground” yearly than the “warm season” grasses and turf type tall fescue is because the label requires it. The label allows more for the grasses that are 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, then you can choose to use the greater application amounts if you think you need them.


Prodiamine Coverages Per Year

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

For warm season grasses and turf type tall fescue, if you follow the recommendations above, you will utilize .83oz or 23.5g per 1,000 sq ft. per year.


The bottle of prodiamine WDG is 5oz/141.7g which means it will cover 6,000 sq ft for one entire season. (2 spring applications and 1 fall application)

Here is the math:

5/.83=6.02

141.7/=6.02


Kentucky Bluegrass, Ryegrass

For cool season grasses KBG and ryegrass, if you follow the recommendations above, you will utilize .55oz/15.6g per 1,000 sq ft per year.


The bottle of prodiamine WDG is 5oz/141.7g which means it will cover 9,000 sq ft for one entire season. (2 spring applications and 1 fall application)


Here is the math:

5/.55=9.09

141.7/15.6=9.09

You can see, I have rounded the math in these cases but just know if you have Tall Fescue, Bermuda, St Augustine, Centipede, Zoyisa or bahia you can cover 6,000 sq ft per year with this bottle and if you have KBG or ryegrass you can cover 9,000 sq ft per year.


Get prodiamine 65WDG, the small bottle, 5oz total here.