Comments on: Can You Put Preen on Top of Mulch?

By: Doug Hensel

Doug Hensel — Wed, 19 May 2021 16:10:21 +0000

In reply to Joel K..

Joel,
Good Morning.
Good question.
Preen and mulch can be used around vegetables and small fruits. The two together is a one / two punch against the growth of unwanted weeds. HOWEVER – Preen is NOT an organic product. So, if you want to stay organic than you need to control weed growth with other methods. The one good thing about Preen is that it can help eliminate the use of any liquid herbicides.

By: Joel K.

Joel K. — Tue, 18 May 2021 22:40:30 +0000

Is it okay to use Preen and mulch for that matter, in a vegetable garden?

Also is it good to use around blueberry bushes?

By: Kirin Furst

Kirin Furst — Sat, 24 Apr 2021 00:30:42 +0000

Please consider adding a disclaimer about the toxicity of Preen (trifluralin), and any other biocidal chemicals you promote. Your customers should be aware of possible adverse impacts to their local environment and personal health, and the actions they can take to minimize risk. For Preen, these include:
*Toxic to fish, amphibians, and other aquatic life at low concentrations.* Do not use if you live in the vicinity of streams, ponds or wetlands—stormwater will carry Preen far from the application area.
*Possible human carcinogen and androgen blocker (i.e., might mess with testosterone).* Avoid direct dermal contact, inhalation, and ingestion (obviously!)
*Kills many native beneficial plant species that support honey bees, butterflies, and other pollinators.* This effect is difficult to avoid, as Preen will spread beyond the application area no matter what. Consider adopting a garden/lawn design that minimizes biocide use and incorporates native plants.

By: Geethu

Geethu — Thu, 22 Apr 2021 13:31:05 +0000

Can you please suggest something to get rid of mugwort? I have been trying to get rid of them from my plant beds for 10 years. Tried weed block sheet, preen,, even newspaper, pulling them out and digging out the roots. Thanks in advance.

By: Doug Hensel

Doug Hensel — Sat, 17 Apr 2021 17:24:09 +0000

In reply to Deborah Mangolas.

Deborah,
Preen could possibly help. But, Preen will not be able to get under the rock and weeds could germinate from under the stone / away from the Preen product. So, I don’t think it will be 100%. It’s too bad that you can not install a weed fabric under the stone. This would certainly help keep weeds in check. Doug

By: Deborah Mangolas

Deborah Mangolas — Mon, 12 Apr 2021 01:25:39 +0000

I have rocks in the area around our fire pit and a flower bed where I put pots of outdoor plants. The weeds come up through the rocks. Will it help to put Preen on top of the rocks after removing the existing weeds?

By: Doug Hensel

Doug Hensel — Fri, 26 Mar 2021 12:41:34 +0000

In reply to Rich. Rich, Great question. My quick answer is YES. Anything that you can do to enrich the soil and add organic matter will get your plants off to a great start this spring. Doug

By: Rich

Rich — Thu, 25 Mar 2021 19:57:03 +0000

Does it help to put compost down in the garden bed prior to the mulch and preen? anything else we should be applying for a healthy garden of plants?

By: Doug Hensel

Doug Hensel — Sat, 20 Mar 2021 12:47:52 +0000

In reply to Mary Buchanan. Mary, Good Morning. And, a good question. Unfortunately, Preen is not made to use on lawns. What you need is a lawn pre-emergent product. We have it available. Now is the time to get it down. Doug

By: Mary Buchanan

Mary Buchanan — Sat, 20 Mar 2021 00:19:40 +0000

I’m wondering if Preen is effective as a pre emergent for lawn as well as garden? I only have a small area of both and hoped that you could point me to a product that would work for both. Thanks!