Prodiamine 4L Herbicide

Prodiamine 4L Herbicide
$329.00  $365.56  Save 10%!

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Product Overview

The Quali-Pro Prodiamine 4L Pre-Emergent Herbicide is a liquid flowable herbicide that effectively controls grasses and broadleaf weeds. It features a low-staining formulation, low solubility and volatility. Prodiamine 4L works by impeding the growth and development of the target pests. It also offers a long season control for an efficient weed and grass management. To provide best results, apply the herbicide with a calibrated, low pressure sprayer, and use a broadcast boom or handheld wand. Prodiamine 4L is great for established turfgrasses (except golf course putting greens), ornamentals, Christmas tree farms, lawns and sod nurseries.

Features and Specs

Active Ingredient Prodiamine - 40.8%
Target pests Barnyardgrass, Annual Bluegrass, Chickweed, Crabgrass (large & smooth), Foxtails, Goosegrass, Henbit, Purslane, Spurge, Witchgrass and more
* See Label for complete list
For use in Commercial Cool & Warm-Season turf-grasses (excluding golf course putting greens), Lawns and Sod Nurseries, Ornamentals and Christmas Tree Farms
Application * See Label for complete application instructions
Pet safe Yes, if used as directed on Label
Formulation Professional Product
Special Features Low solubility and volatility stays in the weed germination zone
Low-staining formulation
Shipping Weight 26.51 lbs
Manufacturer Quali-Pro (Mfg. Number: 83014144)
UPC 072693414402
EPA Registration 53883-379



Mix Quali-Pro Prodiamine 4L thoroughly in the spray tank to ensure uniform application. Steps to follow when mixing Quali-Pro Prodiamine 4L include:

  1. Filling the spray tank 1/4 full with clean water only.
  2. Starting the agitation system and checking to ensure it is working properly.
  3. Maintaining vigorous agitation in the spray tank before and during the application to ensure a well-mixed spray suspension.
  4. Adding a spray colorant with Quali-Pro Prodiamine 4L to mark treated areas and improve application accuracy by minimizing swath skips and overlaps.
  5. After use, thoroughly clean the sprayer by flushing the system with water containing a detergent.


Apply Quali-Pro Prodiamine 4L in a minimum of 20 gallons/acre (0.5 gallons/1000 sq. ft.) of carrier (water and/or fluid fertilizer) using a calibrated, low-pressure sprayer with 50 mesh or coarser screens. A broadcast boom or handheld wand designed for herbicide or insecticide application will provide the best results. Select nozzle pressure and gallons to provide complete coverage.

States Registered: AL; AR; AZ; CA; CO; CT; DC; DE; FL; GA; HI; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NM; NV; NY; OH; OK; OR; PA; RI; SC; SD; TN; TX; UT; VA; VT; WA; WI; WV; WY

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Questions & Answers

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How much Prodiamine 4L do I add to 4 gallons of water for Bermuda and Fescue grass lawns?

The Quali-Pro Prodiamine 4L Pre-Emergent Herbicide rate used is not set per gallon as the amount of water used is not as important as making sure to apply the correct amount of product over an area. You would use 0.23 to 1.1 fl oz per 1000 sq ft, which is normally 1 gallon water, depending on your lawn type. Please refer to the product label for complete instructions.

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10 of 30 people found this answer helpful

What is the usage rate for Quali-Pro Prodiamine 4L Pre-Emergent Herbicide?

I'm trying to spray in the next week here in the Memphis TN area. I have an acre of land and a 35 gallon tank sprayer. Do I need 1once per square feet? I have about an acre to cover.


The rates for Prodiamine 4L Herbicide will vary depending on the type of turfgrass you are treating, desired length of weed control, and how many applications you plan to make per year. You can apply a maximum of 10 oz – 48 oz per year per Acre, depending on your turfgrass. You can view application charts beginning on page 5 of the product label here.

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7 of 14 people found this answer helpful

Best liquid pre-emergent w/ Prodiamine you have?

Prodiamine 4L Herbicide, Resolute 4FL Herbicide, or Barricade 4FL Herbicide would be the liquid prodiamine we carry.  They all contain the same percentage of active.

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7 of 8 people found this answer helpful

When is a good time to apply Quali-Pro Prodiamine 4L Pre-Emergent Herbicide in the fall?

When applying a pre-emergent like Quali-Pro Prodiamine 4L Pre-Emergent Herbicide, the rule of thumb is by September 15th. However, keep in mind that if you are seeding in the same season you would want to either seed first, then apply the pre-emergent at least 6 weeks later toa llow the lawn to establish. Or seed at least 3 months after the pre-emergent has been applied. 

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5 of 6 people found this answer helpful

What can I use to kill winter weeds when spraying Prodiamine? Our soil temps are at 60 degrees with bermuda.

If the grass is completely 100% for sure dormant you should be able to treat any actively growing weeds with a glyphosate product like GlyPhoSel Pro along with the pre-emergent.

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