Stephen from Evergreen, Al writes
Want to overseed in 2 weeks any help? Have 2 yr old lawn carpetgrass & centipede target turf.
The only product you can use for post-emergent control that would allow you to reseed that quickly would be a non-selective herbicide such as RoundUp QuikPro. Certainty Herbicide is safe for use on centipede and bahia grass and it does not control crabgrass, so it would not be appropriate for your application needs. Unfortunately, we do not have any selective post-emergent herbicides which are safe for both carpetgrass and centipede while killing crabgrass and bahia grass. We also generally do not recommend overseeding in the middle of summer when temperatures are very hot since these conditions make it difficult for new turf to establish.
Answer last updated on: 06/25/2018
