Merritt writes
Barricade 65 WDG Herbicide can be applied 60 days after seeding or after the second mowing. Please contact your local cooperative extension office for the best time in your area for overseeding and pre-emergent applicaitons as this can vary from year to year. If soil temperatures were below 55 degrees or around freezing when the overseeding was done, this could have an impact on seed germination.
Answer last updated on: 02/18/2021