Page 1 of 1

Seeding after pre-emergent and glyphosate

Posted: May 22nd, 2020, 2:19 pm
by EriCS198
Hey guys just a quick question, I applied Prodiamine early April and decided roundup some patches of possible Triv yesterday. Would it be safe to lay a bed of topsoil over these areas and reseed at the moment or do I have to wait? I’m started to question my original plan of laying a bed of topsoil, seeding, and then top dress with peat moss. I hope between the premergent and the glyphosate I don’t have any issues. Thanks

Re: Seeding after pre-emergent and glyphosate

Posted: May 23rd, 2020, 10:09 am
by bernstem
Prodiamine will prevent the roots from growing past it. If you place topsoil, the grass will germinate, but roots won't grow below the new soil and will struggle. A better option would be to pull plugs from elsewhere in the lawn and transplant them into the dead spots.

Re: Seeding after pre-emergent and glyphosate

Posted: May 23rd, 2020, 3:04 pm
by EriCS198
Too big of an area to do that, what if I rough up the soil with a dethatcher?

Re: Seeding after pre-emergent and glyphosate

Posted: May 24th, 2020, 10:01 am
by bernstem
Dethatcher may help, but I wouldn't count on it though I don't have personal experience trying it. You probably need to break up the top 1-2 inches of soil to be sure you have broken down the Prodiamine barrier. How big an area are we talking about?

Re: Seeding after pre-emergent and glyphosate

Posted: May 24th, 2020, 12:43 pm
by EriCS198
I would say at least 500 sq ft, I rented a dethatcher today and did the best I could with it. Lesson learned on this one for sure! Worst case scenario I will live with the look until early Sept. and overseed or do a reno which was my plan anyways. Wish me luck, I’ll post the results in due time...