Pin Dee 3.3 T&O Herbicide


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5.0 Rating: 5.0

2 Reviews | 9 Q&A 


  Size/Description Price/Ea. Qty  
Pin Dee 3.3 T&O Herbicide jug(s) (1.25 gallons)

Buy 1: $73.77 each

Buy 2 or more: $70.98 each

Total Price: $0.00

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Pin Dee 3.3 T&O Herbicide

Pin Dee 3.3 EC Herbicide is for the use of pre-emergence control of most annual grasses and broadleaf weeds as they germinate. Pin Dee 3.3 EC Herbicide can be used in established landscape ornamentals and gardens; around and in field and container grown ornamental nurseries; nonbearing fruit and nut crops; conifers and hardwood seedling nurseries; and for prepping tree plantation sites. It can also be applied for general grounds maintenance around bike and jogging paths, driveways, roadsides, markers and fence lines, buildings, parking lots and other areas.

Active Ingredient: Pendimethalin- 37.4%
Target pests: Barnyardgrass, Crabgrass, Foxtail, Hop Clover, Knotweed, Prostrate spurge, Goosegrass and others
* See label for complete list
For use in: Commercial and Residential Turfgrass, Fields, liner and container Nurseries, and Non-Bearing Fruit Trees
* See label for complete list
Application: 1.3 - 1.8 oz. per 1,000 sq. ft.
3.6 - 4.8 pints per 40 gallons of water per acre
* See label for complete application instructions
Pet safe: Yes, when used as directed on label
Formulation: Professional Product
Manufactured By: Drexel Chemical Co. (Manufacturer Product Number: 10000-510)

Pin Dee 3.3 EC Herbicide will not work on existing weeds. Pull out existing weeds if there are any and then apply this mix.

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  • 3 of 5 people found this review helpful:

    5 of 5 Stars  Works great in Arizona Desert!
    June 18, 2013
    Verified Purchase

    This product far surpasses anything we've used in our area. It is the only thing that has managed to keep the prominent weeds in our area from coming back. This is all we'll use!!

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  • 3 of 5 people found this review helpful:

    5 of 5 Stars  Best Pre-Emergent on the Markete
    July 9, 2013

    We've tried other pre-emergent products but this is the ONLY one that treats all the weeds in our area. We're in Arizona (West Valley) and after trying other products we are back to Pin Dee and SWEAR BY IT!! Fantastic product, excellent results, and consistent results.

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March 3, 2014John from Dublin, Ga asked:

QWhat rate on a hose end sprayer (per gallon of water) is needed for 3.6 oz per 1000 sq ft?
I ordered a liquid pre emergent herbicide from you last week. I am applying with a hose end sprayer that is calculated at an application rate per gallon of water. The pre emergent says the application needs to be at 3.6 ounces per 1000 square feet. What does the setting on the hose end sprayer need to be?


The first thing you need to know when using an herbicide such as Pin Dee 3.0 T&O is that the exact amount of water you dilute it with is not important.  It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your lawn, use too little and you will not get adequate results. 

Pre-emergent herbicides are not recommended to be used in a hose end sprayer for the exact reason you described with the dilutation instructions on the label. 
You will need to use 1.3 to 1.8 fl oz per 1,000 sq ft depending on your turfgrass. To decide how much water you want to use, you should mark a 1,000 sq ft area, fill your sprayer with water ONLY, and start walking and spraying just as if you were doing the actual application of herbicide. When you are done walking and spraying the 1,000 sq ft area note how much water it took you to spray that area, and that is the amount you will want to mix 1.3 to 1.8 oz of product with for each 1,000 sq ft area that needs to be treated. You will need to make sure treated areas are irrigated with at least 1/2 inch of water (either by rainfall or by sprinkler) following the application

2 of 3 people found this answer helpful.
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August 7, 2013John from Chesapeake, Va asked:

QIs Pin Dee 3.3 EC herbicide safe to use on bermuda hybrid?

AThe Pin Dee 3.3 EC herbicide label does state that it can be used on Bermudagrass.

1 of 1 people found this answer helpful.
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June 27, 2014Bill from Green Valley Az asked:

QDoes Pin Dee 3.3 T&O Herbicide include a dye indicator or is there one I can add that is compatible?


Pin Dee 3.3 EC Herbicide does not include a built in dye indicator. We do carry Turf Mark Blue  that can be added to show visible areas of treatment. Please click on the link for additional information including container size and cost.

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July 24, 2013Jim from Greenville Sc asked:

Qis this safe to use on vinca minor

APin Dee 3.3 EC Herbicide is not labeled for use one vinca minor.

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March 10, 2014Sue from Sparland, Il asked:

QIs Pin Dee 3.3 T&O Herbicide water soluble?
Looking for pre-emergent crabgrass control. I looked at Pendulum, but noted one customer said he only uses the water soluble pendimethalin because it won't leave stains. So, I'm looking for a water soluble pendimethalin product.

AIndeed Pin Dee is water soluble. For cool season grasses, you want to mix 1.3 to 1.8 Fl. oz Pin Dee with the amount of water needed to cover 1000 sq. feet. Please let us know if you have more questions.

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February 18, 2014Sv from Burkburnett Texas asked:

QDoes Pin Dee 3.3 need to be watered in?

AThe label states that Pin Dee 3.3 EC works better if there is at least a 1/2 in. irrigation after application. Please consult the product label for instructions.

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February 22, 2014Wayne from Helena Ok asked:

QWhat is the right timing to spray Drexel Pin Dee 3.3 T&O to kill weed seeds?

APlease contact your local cooperative extension office to determine the correct timing of the application as this will vary greatly from region to region.

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January 29, 2015Jesse from Midland, Tx asked:

QDoes Pin Dee 3.3 leave yellow stains?

APin Dee 3.3 will leave yellow stains on concrete or similar surfaces.

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January 30, 2015Keith from Cashion, Okla asked:

QIs Mixing Pin Dee possible with Roundup to kill existing weeds that have already came up??

AThe product label for Pin Dee 3.3 EC Herbicide does give instructions for tanking mixing with glyphosate products.  Do not apply tank mixtures containing glyphosate over the top of ornamental plants. Before tank mixing, a simple jar test is recommended to insure compatibility of herbicides. Always read the companion product label. Follow all use precautions and restrictions that apply to each product used. Always follow the most restrictive label.

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