Anom wrote:

Northern NY. Full sun lawn . The crabgrass problem eludes me.
Pre emergent Scotts with fert just didn't seem to help. If I spray the adult
stuff it looks like hell and kills adjacent grass. I would spray anyway if I
thought it would prevent next years crop. Anybody?


Pre-emergent crabgrass killer only works in the early spring before the
seed sprouts have broken the surface.

Crabgrass killer spray kills the existing plants. The idea is to do it
before the set their seeds for next year. Yes, the holes left are ugly
but I'm not sure what you think is going to replace the dead plants.
Crabgrass killer should not kill adjacent grass, but a broad spectrum
killer such as RoundUp certainly will.