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Preen Garden Weed Preventer - 16 lb. - Covers 2,560 sq. ft.

4.6 4.6 out of 5 stars 696 ratings
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Amazon's Choice in Weed Killers by Preen

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Purchase options and add-ons

Brand Preen
Item Weight 8.1 Pounds
Item Form Other
Active Ingredients Trifluralin
Coverage 2560 square_feet

About this item

  • Stop weeds before they start for up to 3 months guaranteed
  • Safe for use around over 200 established flowers, vegetables, trees and shrubs
  • Apply anytime in spring, summer or fall
  • Not for use on lawns
  • Weed preventer does not kill existing weeds
  • Safe for use on edibles (see use directions for complete list)
  • Covers 2,560 sq. ft.

Customer ratings by feature

Easy to use
4.9 4.9
Easy to spread
4.9 4.9
Value for money
4.4 4.4

Frequently bought together

$31.99 ($0.12/Fl Oz)
Get it as soon as Monday, Apr 1
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$13.99 ($0.16/Ounce)
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Preen Garden Weed Preventer - 16 lb. - Covers 2,560 sq. ft.
Preen Garden Weed Preventer - 16 lb. - Covers 2,560 sq. ft.
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Preen Garden Weed Preventer Plus Plant Food - 16 lb. - Covers 2,560 sq. ft.
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Price-20% $31.99
List:$39.99
-31% $12.79
List:$18.49
$43.96$92.99-10% $37.99
List:$41.99
-20% $40.97
List:$50.99
Delivery
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Get it Apr 1 - 3
Get it as soon as Monday, Apr 1
Get it as soon as Monday, Apr 1
Customer Ratings
Easy to use
4.9
4.2
4.2
4.8
4.5
4.5
Easy to spread
4.9
4.4
4.1
4.8
4.5
4.6
Value for money
4.4
4.0
3.7
4.2
4.0
4.0
Sold By
Amazon.com
Amazon.com
Amazon.com
WhoIsCamera
Amazon.com
Amazon.com
coverage
2560 square feet
1000 square feet
Covers 2,500 sq. ft.
1630 square feet
Covers 2,560 sq. ft.
active ingredients
Trifluralin
Herbicide, prodiamine
Trifluralin
form
Other
Granules
Spray
Granules
Granule
Granules
weight
8.1 pounds
5.4 pounds
4 ounces
1 pounds
10 pounds
16 pounds

Product information

Warranty & Support

Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Preen

Preen Garden Weed Preventer - 16 lb. - Covers 2,560 sq. ft.


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From the manufacturer

preen

Prevent Weeds in 4 Easy Steps for Up to 3 Months, Guaranteed

preen

preen

preen

preen

Remove Existing Weeds

Remove any existing weeds, taking care to remove their roots. Preen garden products do not kill existing weeds, they prevent them.

Mulch the Area

A three-inch layer of mulch helps retain soil moisture, keeps soil temperature even and looks nice and tidy. Mulch also has preventative properties of its own, assisting Preen in keeping weeds away.

Apply Preen

Sprinkle Preen on top of mulch. Apply when the garden is dry so Preen granules won’t stick to wet plant leaves.

Water To Activate

After applying Preen, water the granules to release ingredient that forms an invisible barrier that blocks weeds beneath the surface.

preen

preen

preen

preen

Prevent Weeds Around Flowers, Vegetables, Trees & Shrubs

This Preen product can be used around over 200 established flowers, vegetables, trees and shrubs as listed on the product label (see special section for use on vegetables).

Apply Anytime Weeds are Growing

Preen works best when applied in spring after spreading mulch on your flower and shrub beds before weeds start growing. If you forget to apply in early spring - no problem - this product can be applied anytime weeds are growing.

Prevents Weeds* for up to 3 Months

This Preen product blocks common broadleaf garden weeds such as chickweed, knotweed, purslane, and thistle, as well as grassy garden weeds like crabgrass, foxtail, and bluegrass for up to 3 months. *See use directions for complete list of treated weeds

Product Description

Product Description

Stop weeds before they start for up to 3 months guaranteed

From the Manufacturer

Preen Garden Weed Preventer stops weeds from germinating in flower and vegetable gardens, in ground covers and around trees and shrubs. Although Preen will not kill existing weeds, it will prevent new weeds from sprouting - eliminating the need for difficult and time-consuming hand-weeding. Without weeds, your valuable plants can grow larger and stronger. Apply Preen Garden Weed Preventer anytime during the growing season around established plants and transplants. Preen should not be used on flower seeds. It can be used after flowering plants have germinated and are 2-3 inches tall. Preen may also be incorporated into the soil when seeding vegetables or applied after mulching beds. By applying Preen as early as possible, you can eliminate the need for hand-weeding. Rain does not wash this product out of the soil. To keep beds weed-free all season long, reapply Preen Garden Weed Preventer every 9 - 12 weeks.

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Customer reviews

4.6 out of 5 stars
4.6 out of 5
696 global ratings

Customers say

Customers like the appearance, ease of use, value, and quality of the weed moss control agent. For example, they mention it looks beautiful, saves time, and is a good investment for future use. That said, they say it works great to keep the mosses down and prevents new weeds from popping up.

AI-generated from the text of customer reviews

141 customers mention120 positive21 negative

Customers like the quality of the weed moss control agent. For example, they mention it works great to keep the mosses down, prevents new weeds from popping up, and prevents weed from germinating. That said, some say it's short of magic, but does a substantial job.

"Works great!" Read more

"...before the weeds germinate and start to grow and it will reduce the weed population. We use it mostly in graveled areas, not around plants or flowers." Read more

"...It doesn’t stop any established weeds. It doesn’t stop germination, it changes the structure of the newly germinated root to be too thick to go into..." Read more

"...weeds the Preen application has done its job--I have seen no perceivable weed growth in the areas I cleared with this method...." Read more

29 customers mention29 positive0 negative

Customers appreciate the value of the weed moss control agent. They say it's a great product for a reasonable price, and a good investment for future use. Customers also mention that the product is easy to apply and prevents weeds if applied early in season.

"...I use it every year. Great value for container size. Sale was awesome during Prime Days 2022!" Read more

"We have used this product several times, and this is packaging is a great value. It definitely prevents weeds from germinating...." Read more

"...The cost is well worth it as it saves my back during spring growth time." Read more

"...Saves a lot of back breaking weeding, worth every penny!" Read more

20 customers mention14 positive6 negative

Customers find the weed moss control agent easy to use. They say the application process is simple and saves time. Customers also mention that the product does the work much easier than them weeding, making it easier to care for their landscaping.

"...The application process is easy, and an every 2-3 month ritual is still much easier than pulling weeds or reapplying mulch...." Read more

"...of weeds that pop up in our landscaped beds by about 90% and saves me so much time...." Read more

"...I was so disappointed that so much of the product was wasted and made a huge mess in the house." Read more

"...It makes it so much easier to care for my landscaping because I'm not constantly pulling weeds...." Read more

5 customers mention5 positive0 negative

Customers are satisfied with the appearance of the weed moss control agent. They mention that it looks beautiful and is in a nice pail.

"...Did it about a mont ago and sprinkled this on, the rocks still look great! Will buy again!" Read more

"...At long last, my lawn that used to be an embarrassment, looks beautiful! After applying it to my flower beds, I am yet to see a weed this season...." Read more

"...short, this product simultaneously makes my life easier and the yard more attractive." Read more

"I sure needed this and it is working well , Hawaii has beautiful plants and healthy weeds so this product does its job." Read more

5 customers mention5 positive0 negative

Customers are satisfied with the performance of the weed moss control agent. They mention that it's amazing, great, and handy. They also say that it makes their life easier and the yard more attractive.

"This stuff is amazing. It cuts down the number of weeds that pop up in our landscaped beds by about 90% and saves me so much time...." Read more

"...In short, this product simultaneously makes my life easier and the yard more attractive." Read more

"This Preen is great! It prevents weed seeds from germinating and the effect lasts for many weeks! Wish I had discovered this years ago!..." Read more

"This stuff is GREAT! I have so less to weed using Preen. It really works great if you remove the weeds first. I highly recommend this product." Read more

4 customers mention4 positive0 negative

Customers are satisfied with the durability of the weed moss control agent. They mention that it lasts for about 3 months and the effect lasts many weeks.

"...Lasts for about 3 months. Otherwise, use it throughout the season but know you won't eliminate all weeds." Read more

"...Lasts about six months. Works well. If you water the granule, you don’t have to worry about birds eating them." Read more

"...It prevents weed seeds from germinating and the effect lasts for many weeks! Wish I had discovered this years ago!..." Read more

"good stuff. lasts for about 3 months." Read more

It works!
5 Stars
It works!
This stuff works! I have several large landscaping beds that the previous owners put rock mulch in. After 10+ years, the 2-3" of rocks have a significant amount of dirt (silt) embedded in them. As soon as the top layer of rock is removed it looks like a dirt/rock mixture. As you might expect I have an absurd amount of weeds in these beds, so many I was initially resigned to the arduous task of either replacing them with mulch or removing, cleaning, and replacing the same rock mulch. After a friend's recommendation I tried Preen, and now using it as directed has kept my weeding needs to a minimum.As the manufacturer explains, it won't kill current root structures, which is why it's safe around ornamentals. In my case I first burnt all the (then empty) beds using a propane weed torch. I then applied Preen and over the next few weeks pulled any weeds that did emerge. I expected some to come back because the weed torch, as with Preen, does not kill the plants roots but only destroys the above ground greenery. I chose this approach because I wanted to get shrubs and other plants into the beds this year, and any type of standard herbicide like Roundup could have hurt these plants also, not to mention the other highly negative effects of Roundup on wildlife, ground water, and the environment. I've been pleasantly surprised by how few weeds have come back, and even more to see that once I removed these weeds the Preen application has done its job--I have seen no perceivable weed growth in the areas I cleared with this method. The application process is easy, and an every 2-3 month ritual is still much easier than pulling weeds or reapplying mulch. If it keeps working like this, Preen will have a happy customer for life with me!The picture I've included is a formerly weed infested bed about a month after pulling weeds and then applying Preen--weed growth is near zero, and we've have plenty of soaking rains to encourage them.
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Reviewed in the United States on December 28, 2023
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Reviewed in the United States on August 28, 2016
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5.0 out of 5 stars It works!
Reviewed in the United States on August 28, 2016
This stuff works! I have several large landscaping beds that the previous owners put rock mulch in. After 10+ years, the 2-3" of rocks have a significant amount of dirt (silt) embedded in them. As soon as the top layer of rock is removed it looks like a dirt/rock mixture. As you might expect I have an absurd amount of weeds in these beds, so many I was initially resigned to the arduous task of either replacing them with mulch or removing, cleaning, and replacing the same rock mulch. After a friend's recommendation I tried Preen, and now using it as directed has kept my weeding needs to a minimum.

As the manufacturer explains, it won't kill current root structures, which is why it's safe around ornamentals. In my case I first burnt all the (then empty) beds using a propane weed torch. I then applied Preen and over the next few weeks pulled any weeds that did emerge. I expected some to come back because the weed torch, as with Preen, does not kill the plants roots but only destroys the above ground greenery. I chose this approach because I wanted to get shrubs and other plants into the beds this year, and any type of standard herbicide like Roundup could have hurt these plants also, not to mention the other highly negative effects of Roundup on wildlife, ground water, and the environment. I've been pleasantly surprised by how few weeds have come back, and even more to see that once I removed these weeds the Preen application has done its job--I have seen no perceivable weed growth in the areas I cleared with this method. The application process is easy, and an every 2-3 month ritual is still much easier than pulling weeds or reapplying mulch. If it keeps working like this, Preen will have a happy customer for life with me!

The picture I've included is a formerly weed infested bed about a month after pulling weeds and then applying Preen--weed growth is near zero, and we've have plenty of soaking rains to encourage them.
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69 people found this helpful
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Reviewed in the United States on August 8, 2023
Reviewed in the United States on November 11, 2023
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Reviewed in the United States on September 24, 2023
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Reviewed in the United States on October 10, 2023
Reviewed in the United States on September 3, 2023