Seeding after pre-emergent

[Bob E]

I now have a company that comes by and puts down pre-emgergent twice a year and fertilizes throught the year. I think the total is 5 or 6 times.

Thay have already been here once this year.

My question is that I have a couple of places I need to spread seed in. If I break up the surface soil a little bit and sow seed will the pre-emegernt stop the seed from germinating? Or does the pre-emergent create a blanket on the soil surface and by tilling the area I will sow will that allow the seed to germinate?

I will be spreading a blend of fescues mixed with some bluegrass.

[Dixie Rob]

I'm no expert, but I've always been told you cannot get seed to germinate after applying pre-emergent for 90 days.

[KCLandscape]

The fescues will have a better chance because they are a bigger seed.
Do a all fescue mix and be sure to scruff up the surface to break the barrier.
Still have to redo/overseed it in the fall I bet

[hvychev77]

i'd wait at least 4 mowing before even attempting it!

[ThreeWide]

Depending on the amount of preemergent applied, seed germination will not occur for at least 90 days afterward, maybe longer.

However, if you till the soil to about 4 inches depth, you will basically eliminate the preemergent barrier. Otherwise, wait until Fall.

[muddstopper]

Break up the soil where you plan to reseed and then water heavily for several days before applying the seed. Applying a humate product will help some since it tends to attach itself to the chemicals holding them and reducing their effectiveness.