Q: Would I be wasting my money applying pre-emergent now. I missed the September date you talk about.
A: Winter weeds don’t all germinate in early October. Some wait until later, even sprouting in the warm days of late November. That said, most are already up. You might get a bit of control if you use a pre-emergent now but I think you’ll get better results by spot-spraying lawn weeds as you see them emerge.