Peter I have taken your classes and find them the best and very knowledgeable My Question is I have put down a pre emergent for crabgrass and now i have crabgrass on my lawn –Crabgrass grows at a rapid rate should I kill the crabgrass or wait and put a post then the pre emergent on in the spring.Thanks Claude
At this late date, Id skip any treatment now and do a well timed application in spring. Chances are some of the crabgrass has already dropped seed. Any crabgrass killer won’t “kill” the seeds so they’d be sprouting in the spring anyway. Don’t apply too early in spring too as I mentioned in my spring class…HERE’s a reminder why.