David from Dover, De writes
Per the Triad Select Herbicide product label: Do not apply to newly seeded grasses until well established (this is typically after 30 days or the second mowing). Also do not Reseed sooner than 3 to 4 weeks after application of this product. Failure to observe all precautions may result in injury to turf and/or susceptible plants
Answer last updated on: 03/30/2020