Can I Put Preen on Top of Mulch?

Share on:

When you are facing the problem of weed growth before putting mulch on your soil or you already want your weeds to die out before you lay mulch to control weeds, you may use preen. Preen makes everything easy for you as it controls weeds efficiently. Also, it enhances the efficiency of your mulch if you are using a mulch to control weeds already.

But here the question arises “Can you put preen on top of mulch”.

First, you need to get a quick idea of preen if you already don’t know this herbicide.

What is preen?

Preen is a pre-emergent herbicide that is used in the prevention of weed growth. Preen is not a weed killer, but it’s a weed prevention herbicide.

Best Weed Killer
preen - the best weed killer

Preen – The Best Weed Killer

Top Features:

  • 1 Application blocks weeds up to 6 months guaranteed
  • When used as directed Preen Extended Control Weed Preventer can be used around more than 600 perennials, groundcovers, shrubs and trees as listed on the product label
  • Flip-top applicator cap makes it easy to apply

Coming back to our question:

Can You Put Preen on Top of Mulch?

Yes, Preen can be used on top of the mulch and as well as on top of soil. Sprinkling preen on top of mulch makes sure to keep granules away from the foliage of plants. Preen has been specially designed to stop weeds seeds from germinating and so prevent weeds.

Well, before laying mulch, it is good practice to use preen first directly on already grown weeds. After this you can remove those weeds and put mulch on the soil.

Also, keep in mind that it can only be used on mulch it is not intended to use on flower seeds, lawns, vegetable gardens, water gardens or other food-producing or edible plants directly.

How to Apply Preen With Mulch? How to Use Preen With Mulch?

here is the complete procedure on “how to use preen with mulch”

  • First of all prepare garden and remove existing weeds. Here you can use preen spray and water the weeds, this will kills weeds from the ground.
  • However, you can just remove the weeds by hand if they are less.
Preen cannot be used on seeds of the flowers. If you want to plant flower plants or vegetable plants try to plant almost set plants of flowers vegetables growing until they are 3 to 4 inches. Because preen can harm these plants.
  • Now spray the preen after clearing out your soil.
  • Now spread mulch over the soil.
  • Now water your area after spreading mulch over it. Water will actviate preen and preen will start working on weeds.
Buy preen and see from the bottle how much to apply. Plus follow all cautions and guidelines on the preens bottle.

Note: You should also carefully choose the mulch you spread on your soil as different mulches kills weeds also and work synchronously with preen to give you best results.

Frequently Asked Questions

Do you put Preen down before mulch?

Yes, you can put down preen before mulch or after mulch. As preen will prevent weed seeds from germination. It is best practice to pull out weeds and spray preen if you want to and then spread mulch over it and again do a mild spray.

Does Preen work on top of mulch?

Yes, preen in liquid form goes into the spaces in between mulch parts and reach the soil where it comes in action on the weed seed and prevent weed growth.

Does Preen go on top of mulch?

Yes, Preen can go on top of mulch if you are spraying it right. It is basically a liquid if you spray it properly then it can go on top of mulch.

Will Preen work on top of mulch?

Preen is great herbicide liquid that spreads efficiently over the mulch and stops weeds from growing. So, yes preen surely will work on top of mulch

Does Preen Kill Weeds? Does Preen Work Over Mulch?

No, Preen is not a weed killer. It just stays with the soil and prevents weeds seed from germination. So it means if you already have grown weeds in garden it will never kill them and do not have any effect on them. So while putting preen on top of mulch or on top of soil make sure to remove all weeds and do not leave a smaller one. This is because preen is highly effective for stopping weed growth and once you pluck all weeds and then put preen on mulch or soil it will definitely save your yard from weeds.

How to Use Preen in Vegetable Garden?

In case you are using preen to stop weed growth in a vegetable garden then use organic preen. Organic preen is made of a hundred percent organic corn gluten. This is organic weed prevention and is safe for use in vegetable gardens. Applying preen monthly will definitely save you time and gives you weed-free garden.

Photo of author


After doing my master’s in agriculture, I went on with this field for more than 15 years because I love working in green. I have experienced using modern machinery and techniques that can help farmers and landscapers to achieve something great. My goal will be to deliver you the best reviews and information to make the right decision.

Leave a Comment