Monterey Weed Impede (Surflan Herbicide)

4.5 out of 5 stars 10 Reviews | 20 Q&A

Monterey Weed Impede (Surflan Herbicide)

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Average Rating

4.5 out of 5 stars Rating: 4.5

10 Reviews | 20 Q&A

Product Overview

Same active ingredient as Surflan Herbicide! Weed Impede (formerly Weed Stopper) from Monterey is a pre-emergent treatment for control of annual grasses and certain broadleaf weeds in established warm season turf including bahiagrass, bermudagrass, buffalograss, centipedegrass, St. Augustinegrass, zoysiagrass and established tall fescue growing in warm season areas, ornamentals, trees, roses, bulbs, iceplant and garden grown fruit trees. Weed Impede lasts up to 6 months to control grasses and weeds. Can be tank mixed with Round Up in unplanted areas.

Features and Specs

Active Ingredient: Oryzalin 40.4%
Target pests: Controlled: Carpet weed, Purslane, Chickweed, Groundsel, Henbit, Prostrate Spurge, Pigweed, Barnyardgrass, Lovegrass, Annual Bluegrass, Wild Oat, Large Crabgrass, Smooth Crabgrass, Foxtails, Italian Ryegrass, Goosegrass, Witchgrass

Suppressed: Horseweed, Black Nightshade, Ragweed, Prickly Lettuce, Smartweed, Sowthistle, Climbing Milkweed, Spotted Spurge, Morningglory, Teaweed, Black Mustard, Velvetleaf, Wild Mustard, Volunteer Wheat
For use in: Certain established landscape ornamental plants, including trees, shrubs, ground covers/perennials, and flowers, non-bearing fruit and nut trees, non-bearing vineyards, and ornamental bulbs grown in flowerbeds, ornamental plantings and rock gardens
Application: 1.5 - 3 oz. per 1,000 sq. ft.
Pet safe: Yes, if used as directed on label
Yield: Treats 5,000 to 10,000 sq. ft.
Formulation: Professional Product
Shipping Weight: 1.43 lbs
Manufacturer: Monterey Lawn & Garden (Mfg. Number: LG 5130)
UPC: 022179100053
EPA Registration: 54705-5

Details

Weed Impede is a pre-emergent treatment for control of annual grasses and certain broadleaf weeds in established warm season turf including bahiagrass, bermudagrass, buffalograss, centipedegrass, St. Augustinegrass, zoysiagrass and established tall fescue growing in warm season areas, ornamentals, trees, roses, bulbs, iceplant and garden grown fruit trees. Weed Impede lasts up to 6 months to control grasses and weeds. Can be tank mixed with Round Up in unplanted areas.

WARNING: This product can expose you to chemicals including oryzalin, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov

5 stars   8
4 stars   1
3 stars   0
2 stars   0
1 star   1
  
  • 5 of 5 Stars

    Weed Impede

    By Mark on 03/13/2014

    Excellent product as long as you use it every 6 months as directed (in AZ that is in March and October). Be sure to water the applied area if it des not rain. I have 1.25 acres with almost no weeds when used as compared to my neighbors that have weeds all over. I am a life long user now!

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    15 of 16 people found this review helpful

  • 5 of 5 Stars

    Fast, efficient, and best price.

    By Robert on 04/22/2013

    Order came promptly, price was best, and I didn't even have to leave the house. Bob

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    8 of 18 people found this review helpful

  • 1 of 5 Stars

    Monterey Weed Impede

    By Steve on 02/05/2015

    Verified Purchase

    Not sure about other states but my Arizona weeds laughed at it.

    Expert ResponseExpert response:
    Weed Impede is designed to be a pre-emergent herbicide only, so if you are needing to treat existing weeds, then you will need to use an additional product. We are happy to assist you with choosing products appropriate for your situation, depending on what plants you are trying to control and in what areas. You may reach us by telephone at 866-581-7378 M-F 9a-5p EST.

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    7 of 9 people found this review helpful

  • 4 of 5 Stars

    Good product, but too expensive in pints.

    By Rick on 01/28/2015

    Verified Purchase

    I've used this pre emergent for over 30 years and it is very effective for mostly grassy weeds and some broadleafs. Unfortunately DMOPC has been out of stock on gallons for some time and they don't list quarts at all. I bought a pint to get me by but the price is double per ounce.

    Expert ResponseExpert response:
    Thank you for your comments! We do have the same formulation available from other manufacturers with 40.4% Oryzalin. Surflan Pro Herbicide is available in pints and quarts here: http://www.domyownpestcontrol.com/surflan-pro-herbicide-oryzalin-404-p-1819.html. Surflan is also available in a 2.5 gallon container for larger applications: http://www.domyownpestcontrol.com/surflan-as-herbicide-p-1555.html. You may also call us for product availability at 866-581-7378 M-F 9a-5p EST.

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    3 of 3 people found this review helpful

  • 5 of 5 Stars

    Good Deal - Buy in Bulk

    By Sakita on 04/16/2017

    I've been using this product for many years stopping weeds before they get started (just follow the directions - and yes, a hose-end sprayer actually works well and is much easier than other alternatives like a pump sprayer - especially if you have a large yard). In my honest opinion, our yard is usually the most weed-free one in the neighborhood come weed season. Buying a gallon was much less expensive than buying quarts locally.

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    1 of 1 people found this review helpful

See all 10 customer reviews

Questions & Answers

Have a question about this product?
  
Q
Can Weed Impede be applied with a watering can and if so how do I mix it?
A

The Weed Impede product label does recommend that you use either a handheld sprayer or a backpack sprayer to get even coverage and this would be our recommendation as well. The amount of Weed Impede you will use will vary depending on what weeds you are trying to prevent and what season you are treating in but in general you will need 1-12 fl oz per 1,000 sq ft of area to be treated. According to the Weed Impede product label:

"The amount of water used to apply WEED IMPEDE™ herbicide is not critical, but should be sufficient for uniform coverage of the target area. Calibrate by determining the volume of water required to treat 1,000 square feet. Use this calibration volume to determine the amount of water and WEED IMPEDE™ herbicide needed to treat the target area (see the following calibration example). Note: Sprayer calibration (volume of spray needed to treat 1,000 square feet) will vary with each individual operator.
Steps in Calibration:
1. Mark an area of 1,000 square feet (i.e. 20 by 50 feet or 25 by 40 feet).
2. Place the sprayer on a level surface and add water noting the final level of water in the spray tank.
3. Spray the marked area with a sufficient volume of water to provide uniform coverage. Refill the sprayer to the same level as before measuring the amount of water added. The measured water added to the sprayer is the volume needed to cover 1,000 square feet.
4. Determine the application rate (fl. oz./1,000 sq. ft.) for WEED IMPEDE™ from the Recommendations section of this label.
5. To each volume of water used as measured in step 3, add the amount of WEED IMPEDE™ as determined in step 4.
Example: If the sprayer uses 2 gallons of water to cover 1,000 square feet and the desired application rate of WEED IMPEDE™ is 3 fluid oz./1,000 square feet, then you would add 3 fluid ounces of WEED IMPEDE™ to every 2 gallons of water to be used."

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18 of 22 people found this answer helpful

Q
Is Monterey orange? Hoping that it will show where I had sprayed in a desert landscape.
A
Monterey Weed Impede (Surflan Herbicide) is indeed a bright orange liquid product.

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11 of 12 people found this answer helpful

Q
How soon can I let my dogs in the back yard after spraying Monterey Weed Impede?
A

Pets can return to the area once dry, typically a few hours is best after applying Monterey Weed Impede to ensure the area is thoroughly dry.

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7 of 7 people found this answer helpful

Q
Does Weed Impede kill dandelions?
A
Monterey Weed Impede is not labeled to control dandelions. Fertilome Broadleaf Weed Control with Gallery is labeled to control dandelions and may better meet you needs.

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5 of 5 people found this answer helpful

Q
Can I use Monterey Weed Impede (Surflan Herbicide) among my Iris and Rose of Sharon/Hibiscus?
A

Monterey Weed Impede (Surflan Herbicide) is labeled for applications around established Iris and Rose of Sharon. Please check the product label list for tolerable plant species on page 3 and application instructions.

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4 of 4 people found this answer helpful

See all 20 customer questions

Monterey Weed Impede (Surflan Herbicide) 4.5 out of 5 stars Rating: 4.5 (10 Reviews / 20 Q&A)

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