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Nitrophos Barricade Granular Pre-emergent Herbicide

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Barricade Herbicide by Nitrophos contains Prodiamine and is designed for the pre-emergent control of grassy and broadleaf weeds in established turfgrass and many other non-crop areas. Barricade must be applied previous to the seed germination or following the removal of existing weeds in order to obtain control of target weeds.

Target Pests

Barricade is used for pre-emergent control of grassy and broadleaf weeds such as barnyardgrass bluegrass carpetweed chickweed crabgrass foxtails goosegrass henbit itchgrass johnsongrass knotweed kochia lovegrass pigweed rescuegrass spurge witchgrass and yellow woodsorrell.

For Use In

Barricade Herbicide is for use in established turfgrass lawns sod nurseries container ornamentals feild grown ornamentals landscape ornamentals conifer nurseries seedling nurseries rights of way roadways roadsides railways equipment yards tank farms pumping stations parking areas storage areas ungrazed fence rows and christmas tree farms.


Barricade is applied with a broadcast spreader at a rate of 10 pounds per 5000 square feet.

Coverage Area

Each 10 lb bag will treat up to 5000 square feet.

Time to Kill

Barricade is specifically for pre-emergent control of grassy and broadleaf weeds.

Active Ingredient

Prodiamine .58%

Nitrophos Barricade Granular Pre-emergent Herbicide

Using Barricade Pre-Emergent Herbicide To Treat Your Lawn

If you're looking for a herbicide that will keep those pesky weeds from emerging in the first place, Nitrophos Barricade pre-emergent herbicide is the product for you and will be a great assistance in keeping your lawn weed-free in the Spring.  Barricase has the ability to prevent the growth of a wide range of different weeds such as Barnyardgrass, Annual Bluegrass, Carpetweed, Chickweed, Large and Smooth Crabgrass, Crowfootgrass, Woolly Cup Grass, Annual Foxtails, Goosegrass, Henbit, Itchgrass, seedling Johnsongrass, Junglerice, Knotweed, Kochia, Common Lambsquarters, Lovegrass, Browntop, Fall and Texas Panicum, Pigweed, Common Purslane, Florida Pusley, Rescuegrass, Shepherdspurse, Signalgrass Broadleaf, Persian Speedwell, Sprangletop,Prostate Spurge, Witchgrass and Yellow Woodsorrel from seed. It can be applied either separately or as an additive to other products to help save time.


How Nitrophos Barricade Pre-Emergent Works

Barricade is a pre-emergent herbicide meaning that it helps prevent weeds from showing up in your lawn. Herbicides in general use a variety of different mechanisms to stop weeds from growing, but pre-emergent herbicides specifically prevent growth after germination in the weed seed by inhibiting a particular vital enzyme in the seed. In other words, it's a form of birth control for the weeds that grow on your lawn. Due to its mode of action, Barricade only keeps seeds from sprouting and will not be effective in controlling weeds that have already emerged. This means that timing is very important if you want Nitrophos Barricade Pre-emergent to work as advertised. 


Safety Precautions to Consider

When it comes to applying any type of pesticides, even herbicides, you must pay close attention to safety. As an example of what not to do, a local college greenhouse had been advised to mix a couple insecticides together for a particular problem in the greenhouse; both student workers who applied the insecticide had trouble breathing following the application and had to stay home for several days, a reaction that could have had far reaching health and legal consequences for the student workers, the university and the supply company that recommended mixing the products. Another example is testing done on inert products in glyphosate, or RoundUp, which had been considered a fairly safe for general use based on tests of the glyphosate. The study found that an inert ingredient essentially smothered human cells, killing them, including embryonic, placental and umbilical cells, causing miscarriage.


By doing something as simple as checking the warnings on the Barricade herbicide label, you will be able to find the information needed to safely apply the herbicide. One of the first things to look at is what personal protective equipment (PPE) you'll need before applying it. This information is on one of the first few pages of the label. For Barricade, you'll want a shirt with long sleeves, long pants, socks, shoes and protective gloves. 


When you're done for the day or the season, it's very important to store herbicides safely. Keeping them where children cannot get to them whether it is in a locked cabinet or building, labeling and securely closing mix bottles to help ensure limited accidental exposure and makes it much easier to dispose of it properly.


Application Tips

There are many tips and tricks you can pick up to make herbicide application go faster and more safely. Whether you're spraying a liquid or dispersing granules of Barricade, you'll want to wait for a day that's relatively mild. If you live in a high wind area, starting on the downwind side of your property and working your way upwind will help keep the herbicide blowing away from you. If you do have to apply while there is a breeve, be very careful so your application doesn't drift over to a neighbor's property.  You do not want to get the pre emergent spray on landscaping that can't handle the application, so be careful!


Spring applications, which control summer weeds, should take place when the weather is at 65-70 degrees F during the day for four days in a row. Fall applications, which control winter weeds, need to wait until night air temperatures reach a low of 55-60 degrees for four days in a row. Measure how many square feet you'll need to treat around your yard and then use that figure to determine howmuch Barricade to mix or distribute. Check the label for the proper usage rates.


Why You Should Choose Barricade over Other Similar Herbicides

Barricade has little to no odor and forms a clear liquid. This gives Barricade an advantage over other herbicides in that it won't effect the appearance and/or color of the plants where they are treated.  Because it is relatively concentrated and does not take much to get the desired effect, it can be applied using a very low dosage. It is a relatively safeherbicide, and is not restricted in terms of who may use it and whether training, a certificate or a license is needed. Compared to other herbicide classes, pre-emergent herbicides help prevent work by keeping weeds from sprouting in the first place. It is very stable in solution, keeping it from settling out.


Now that you've had a chance to educate yourself about the basics of Barricade pre-emergent herbicide, you can start thinking about where and how to apply it to prevent weeds from popping up. By providing a good quality pre-emergent herbicide such as Barricade, you'll be able to enjoy your lawn more and weed it less.

Product Q & A

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Why did you choose this?
Solutions Stores Store
widely recommended for St Augustine grass.
James K on Aug 7, 2017
widely recommended for St Augustine grass.
James K on Aug 7, 2017
When do I apply it?
A shopper on Aug 9, 2017
BEST ANSWER: You will want to apply barricade in the spring and fall months for weed control to prevent emergent of weeds.
I typically use the Nitro-Phos Barricade product as a pre-emergent twice a year, since it works on both broadleaf and grassy weed. This month (Feb) I want to put down the Nitro-Phos Imperial 15-5-10 for an early green up, but it says it's also a pre-emergent. Can I use the Imperial in lieu of the Barricade and will it work to prevent both the broadleaf as well as the grassy weeds?
Kathy H on Feb 3, 2018
Nitrophos Barricade Granular Pre-emergent Herbicide
Nitrophos Barricade Granular Pre-emergent Herbicide
Nitrophos Imperial Lawn Fertilizer
Nitrophos Imperial Lawn Fertilizer
BEST ANSWER: The Imperial Lawn fertilizer would only work as a fertilizer I do apologize for the error in the description. For the Pre-emergent the Barricade would be what you would want to apply. You can apply both of the product and they would not cause any effects on each other. I would make them in separate applications due to the settings on the spreaders.
"Barricade is for selective preemergence control of grass and broad leaf weeds in lawns up to 5,000 sq.ft." - Is this statement for the 10 pound bag or the 50 pound bag? Thanks
BBsouthern on May 5, 2017
BEST ANSWER: The 10 lb bag of Barricade will cover 5,000 square feet.
does this work on buffalo grass?
A shopper on Oct 27, 2017
BEST ANSWER: Yes, you can use a pre-emergent on Buffalo grass to control winter and spring weeds.
Do I need to fertilize after putting this down?
A shopper on Mar 16, 2018
BEST ANSWER: You can fertilize after the Barricade application I would wait a few days before doing this. We want to apply the product down water the granules to activate and allow it to dry and refrain from watering for at least 3 days. This will ensure the product does not move from the original site of application.
Safe for bermuda grass?
Kathy P on Sep 16, 2017
BEST ANSWER: Yes, Barricade can be applied to established lawns including bermuda.
Goran grass has taken over my flower beds where I have lily bulbs and day lillies planted. I want to dig up everything in the bed, treat the soil with a pre-emergent, and replant the bulbs. Bad idea?
Lynn F on Nov 25, 2017
BEST ANSWER: The barricade will not prevent the bulbs from coming up, so you can spray the entire flower bed with herbicide, say Glyphosate, then apply the pre-emergent, on top. Mulch and wait for the bulbs to return in the spring. Apply a second application of pre-emergent to the flower beds in the spring.

How old should a newly seeded area be before using this product? Not just seeded - now about 7 weeks old.
Dawn C on Aug 11, 2017
BEST ANSWER: You will want to wait at least 8 weeks for a new seeded lawn to be established.
Can I use this on top of newly seeded lawn yes it is question?
A shopper on Mar 28, 2018
BEST ANSWER: First thing I recommend is to read the entire label. It is unlikely that a product which prevents see germination would be applied to a newly seeded lawn. Rule of thumb; a newly seeded lawn - just keep it watered until well-established.
does it kill sand burrs?
A shopper on Feb 11, 2018
BEST ANSWER: I do not know. I follow Randy Lemon's Garden Line program for keeping your car healthy and strong and weed free. You could email him or call in on his radio show that comes on Saturday mornings . He can answer all of your questions. Just do a web search one his name.
Is this safe to use in an existing flower bed?
Diana B on Jan 10, 2018
BEST ANSWER: Sorry I haven’t applied this product yet. I bought it to apply to my NC Bermuda grass to control weeds. It looks like I should have put it down in mid December but I’m still learning about this method because some other green is already showing up. I would think it safe around ( established) plants.
50lb bag and a 10 lb bag together will it take care of 19,000 sqft of cool season turf ?
Gregory D on Oct 16, 2017
BEST ANSWER: Each 10 lb bag will treat up to 5000 square feet, so you would need at least 40lbs of Barricade.
is it organic?
A shopper on Apr 1, 2018
BEST ANSWER: No Barricade would not be considered organic.
Is this safe to use when you have a dog that uses yard?
A shopper on Mar 25, 2018
BEST ANSWER: I cautiously say yes. However, with any lawn product I apply it in the afternoon after my dogs have been out for a good long while. I will then thoroughly water it in and allow it to set overnight before I allow my dogs back in the lawn the next morning.
How many square feet will 10 pounds cover?
A shopper on Mar 13, 2018
BEST ANSWER: Each 10 lb bag will treat up to 5000 square feet.
My home in Arizona has gravel instead of grass. After application, does this product need to be watered in? If so, how much water?
A shopper on Mar 12, 2018
BEST ANSWER: yes. It has to get into the soil to be effective. At least a half hour of water within 24 hours of application or until the soil under the gravel is thoroughly wet. Hpoe this helps.
does barricade kill dandelions ?
A shopper on Mar 4, 2018
BEST ANSWER: It will prevent any germination from occurring when applied at the correct time of the season.

Post emergent control of Dandelions can be achieved with Glyphosate.
It’s been crazy in Houston Area...39 one day then 72 the next...with rain every other day...can I apply this now to a damp lawn at 45 degrees when it will be 75 tomorrow?
A shopper on Feb 13, 2018
BEST ANSWER: I love in Katy. I haven’t applied mine yet, just waiting for a dry grass day. Wouldn’t apply it when it’s wet. Soil temps just need to be no more than 55 degrees I think and you’re ok.
is barricade applied as a granular or a liquid?
A shopper on Feb 8, 2018
BEST ANSWER: Barricade is applied as a granule and then needs to be watered in to activate, there are options for liquid pre-emergent if that will work better.

Does this product have a high percentage of nitrogen? Where can I view the analysis?
DannyDaze on Dec 4, 2017
BEST ANSWER: The active in this product is Prodiamine as a pre-emergent.

Prodiamine .58%
Should I use baricade in the fall and spring ?
Gregory D on Oct 7, 2017
BEST ANSWER: You should use Barricade pre-emergent should be used in the fall and the spring months, to control winter weeds as well as spring weeds.
Will this work on sandburrs(stickers)?
Sarah B on Apr 10, 2018
BEST ANSWER: Yes, Barricade is a perfect solutions to stop sandburrs from germinating in the spring. Timing is everything in application. Please refer to our pre-emergent maps and calenders for your location and months of applications for best results.

Will it call my plants?
A shopper on Apr 6, 2018
BEST ANSWER: No, Barricade will not kill your plants. It only prevents seeds from germinating.
If the granules are tracked on my carpet, is it safe to use a regular vacuum?
A shopper on Apr 4, 2018
BEST ANSWER: Yes if granular accidentally made their way into the home you can sweep or vacuum them up.
Will Barricade pre-emergent herbicide, prevent sticky burr weeds?
Dorsey C on Apr 1, 2018
BEST ANSWER: Yes, Barricade when applied at the correct time, will stop Sticky Burr weeds. Here are maps and calendar to application times.

I have pesky bermudian grass in my rose & herb garden. These gardens are already established. Can I use this product in my gardens that already have annuals?
Collette W on Mar 27, 2018
BEST ANSWER: No this will not kill the weeds or grass that are already in the flower beds, you can use Fusillade to kill grass in those areas.

Barricade will work to stop weeds from germinating, still a great idea to apply.
Is it safe for pets and children ?
J K on Mar 27, 2018
BEST ANSWER: Yes, Barricde Pre-emergent is completely safe to use where you have pets and children, just keep them out of the area until it completely dries.
Can I apply podiamine in oklahoma at the end of March? Also can I dissolve the granules in water, if so, how much do I use per acre?
Kari K on Mar 27, 2018
BEST ANSWER: Yes, you can still use the Barricade in March. No you would not dissolve in water and spray.

If you want that type of application the look at Prodiamine, https://www.solutionsstores.com/prodiamine-65-wdg-barricade-herbicide
What setting on Scott's rotary spreader should I use for Barricade?
Robert A on Mar 26, 2018
BEST ANSWER: Unfortunately, we would not have the settings for the Scotts rotary spreader. I would refer to the manual on your spreader for the settings. Look for the setting that has the same output (lb / 1000 sq ft) as the Barricade.
How long before dogs can return to the yard safely?
A shopper on Mar 26, 2018
BEST ANSWER: After application the Barricade will be watered in, you will want to allow it to completely dry before your pets are allowed back into the area.

Customer Reviews

4.8 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Easy to Use
5.0 / 5
5.0 / 5
5.0 / 5
Safe to Use
5.0 / 5
Would you Recommend?
Yes (2)
Stress free ease
The product was shipped on time, and I had no problem applying it to my lawn. Time will tell if it works as advertised.
April 12, 2018
4 weeks ago
Easy to Use
5 / 5
5 / 5
5 / 5
Safe to Use
5 / 5
Would you Recommend?
Great price, fast shipping. Similar products are double the price at my local nusery and forget about the chain stores ever carrying anything this effective.
March 10, 2018
1 month ago
Easy to Use
5 / 5
5 / 5
5 / 5
Safe to Use
5 / 5
Would you Recommend?
Excellent service, excellent product competitive price.
January 17, 2018
3 months ago
Good deal
Item was exactly as described. Havenâ??t used it yet.
October 21, 2017
6 months ago
Went down easy
First time using Barricade, so don't yet know if it will keep the weeds out of my lawn, but I got it on a recommendation.
October 17, 2017
6 months ago

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