Monterey Weed Impede 2 in 1 Herbicide

$32.51 - $521.47

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4.5 out of 5 stars Rating: 4.4

5 Reviews | 2 Q&A


{ $32.51 { $30.21 $41.29 $39.27 $132.76 $131.12 $453.11 $521.47
  Size/Description Price/Ea. Qty
Monterey Weed Impede 2 in 1 Herbicide pint (16 oz)

Buy 1: $32.51 each

Buy 2 or more: $30.21 each

Monterey Weed Impede 2 in 1 Herbicide - Quart quart (32 oz)

Buy 1: $41.29 each

Buy 2 or more: $39.27 each

Monterey Weed Impede 2 in 1 Herbicide - Gallon gallon (128 oz)

Buy 1: $132.76 each

Buy 2 or more: $131.12 each

Monterey Weed Impede 2 in 1 Herbicide - CASE (12 quarts)Monterey Weed Impede 2 in 1 Herbicide - CASE (12 quarts) case (12 quarts)

Save! Get 12 for only $37.76 each

Monterey Weed Impede 2 in 1 Herbicide - CASE (4 gallons)Monterey Weed Impede 2 in 1 Herbicide - CASE (4 gallons) case (4 gallons)

Save! Get 4 for only $130.37 each

Total Price: $0.00

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Monterey Weed Impede 2 in 1 Herbicide - Quart

Monterey Weed Impede 2-in-1 Concentrate is a unique non-selective herbicide because it contains both pre-emergent and post-emergent active ingredients. Glyphosate enters plants through foliage and works systemically through the roots to kill target plants, while Prodiamine creates an invisible barrier in soil to prevent development of new plants. Use Weed Impede on established annual and perennial weeds such as bluegrass, chickweed, crabgrass, goosegrass, mustard, spurge, bahiagrass, bermudagrass, clover, thistle, dandelion, and many more. Use as a pre-emergent for annual bluegrass, chickweed, carpetweed, pigweed, and other listed plants.

Check zone map to see which plants will thrive at certain zones.



Spray when air is calm to prevent drift to desirable plants. For best results, apply during warm, sunny weather (above 60 degrees Fahrenheit).
This product may be applied more than once a year as long as the total amount applied is not greater than the maximum application rate for each turf species.

TANK SPRAYER (plastic, aluminum, fiberglass, plastic-lined steel or stainless steel)

  • Add 3 to 6 fluid ounces to 1 gallon of water and treat 1,000 sq. ft.
  • For longer pre-emergent control and post-emergent control of larger weeds use the higher rate.

Do not apply with a galvanized or unlined steel (except stainless steel) sprayer, or through any irrigation system.


Spray existing weeds AND the entire surrounding weed-prone area you want to keep free of weeds for up to 3 months. Spray the area with sufficient volume to assure complete coverage. When spraying around the base of well-established (at least 6 months old) ornamental plants, shrubs, or trees, shield desirable plants from drift with a sheet of cardboard or plastic. Use caution to prevent application to green stems and leaves, damage can occur.


All ornamental bedding plants, trees, shrubs, sod, and seed (flowers and grasses) may be planted 4 months after application.


To clean sprayer after use, rinse sprayer and all sprayer parts with soap and water 3 times. Spray rinse water on bare soil or gravel. After cleaning, sprayer may be used for other products.


What is Weed Impede 2 in 1 Concentrate?
Weed Impede 2 in 1 is a combination of glyphosate (Roundup®) and Prodiamine. Glyphosate is a post-emergence herbicide that controls existing weeds. Whole prodiamine is a pre-emergence herbicide that controls weeds before they emerge up. This product delivers the control of both herbicides in one application.

Where do I use Weed Impede 2 in 1?
Use in non-planted areas such as driveways, walkways, patio, fence lines, retaining walls, vacant areas, etc. Also use under and around the bases of well-established (6 months old or more) trees and shrub. Use to edge lawns, and to clear weeds in gravel areas.

What is the Principle behind Weed Impede 2 in 1?
One ingredient enters the plant through the foliage and moves down into the roots, killing the plant. The other ingredient provides an invisible barrier in the soil, preventing growth and development of newly germinated weeds.

What rate do I use with Weed Impede 2 in 1?
Apply 3-6 oz. per gallon of water per 1000 sq. feet. Use the higher rate for longer control.

When do I apply Weed Impede 2 in 1?
It can be applied anytime of the year. For best results, apply when the emerged weeds are actively growing and daytime temperatures are above 60 degrees Fahrenheit. More than one application per year can be made.

How soon can I replant after application?
Bedding plants, trees, shrubs, sod, and seed can be planted four months after application.

What precautions should I take?
Avoid drift. Do not apply to the foliage of desirable plants. People and pets should not enter the treated area until the spray has dried. Do not apply to newly planted trees or shrubs (they should be at least 6 months old)

What weeds are controlled?
Most all annual weeds and grasses post emergence. Many common weeds and grasses pre-emergence.

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Average Customer Rating
4.5 out of 5 stars (5)

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Liquid Gold
    By Tony in Elyria, Ohio on 09/20/2016

    Works like a charm, especially on those tough stubborn perennials weeds and should be a staple in the tackle box of any ornamental landscape technician.

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Love this product
    By Jamie in Chandler, AZ on 11/02/2016

    I have used this product for several and have not found anything that comes close to it! It kills the grass and weeds that are in my rocks and sidewalks and prevents new stuff .

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Looks like a winner.
    By Chris in Chandler, Arizona on 02/14/2017

    It is still a little cool here, but I mixed up a small batch 5oz./gal.) and it worked quickly to eliminate all growing weeds. Planning on major application in a week or so (end of Feb.) and expecting pre-emerge to work as well as post-emerge did. I like the added dye to show exactly where spray is going. Looks perfect for a state where weeds grow all year 'round.

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  • 5 of 5 stars  Liquid Gold
    By Anthony in Elyria, Ohio on 09/30/2016
    Verified Purchase

    This is a reliable money maker for my pest control business i.e. works like a charm every time which makes my customers happy, happy, happy.

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  • 0 of 1 people found this review helpful:

    2 of 5 stars  Full opinion pending........
    By Bill in Norwalk, Ct on 06/15/2017

    Not sure what the longer term affect will be as far as pr-emergent use. However the affect on growing weeds was no where even close to just plain Ortho Ground Clear. I noticed nothing at the 4.5 oz per gal mix. Using the 6 oz per gal mix it did kill the growing weeds and grass after about 2 weeks. This is much longer than the over night kill I get from Ground Clear.

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02/11/2017 Ken from Knightdale, Nc

QCan Monterey Weed Impede 2 in 1 Herbicide be applied in an asparagus bed?
I'm looking for a pre emergent that I can use in asparagus bed before the asparagus begins to grow in the spring.


Monterey Weed Impede 2 in 1 Herbicide should not be used for vegetable garden preparations or in and around fruits and vegetables. You can apply a non-selective post-emergent herbicide such as RoundUp prior to planting† (to kill existing emerging weeds) as it only will stay in the soil up to 1-2 weeks. We do carry a pre-emergent herbicide that can only be applied to established asparagus called Monterey Vegetable & Ornamental Weeder. It is applied to asparagus after ferns are removed but before the spear emergence.

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04/24/2017 Bill from Norwalk, Ct

QHow long can I store Monterey Weed Impede after it has been mixed?
If I mix a gallon, does it all have to be used at that time to get full effectiveness? Can what isn't used be kept in the container for a week or so and still work?


Once Monterey Weed Impede has been mixed with water, it must be used or discarded within 24 hours.†

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