[Harts]

As noted above, the Fall N blitz uses a quick release source of nitrogen - Urea or Ammonium Sulfate. This allows you to control the rate at which the grass grows from the nitrogen.

Despite your temps looking good for the next 10 days, I would wait until the end of the month. In Southern Ontario, I've never started my blitz before September 1st.

I would also avoid fertilizer that has potassium this late in the season. There have been studies that link late season potassium apps to an increase in snow mold. While snow mold is mild and rarely does lasting damage come Spring time, it is one more thing to worry about.

I would save the 24-0-6 for your Spring 2023 applications.

As with the pre-m question, depending on timing of previous apps (if any), you may want to wait until September. Part of the Fall app is to provide protection throughout the Winter and early Spring months until the weather is ideal for a Spring time app. There are weeds that start to germinate once soil temps drop below 70F and the Fall app is designed to protect you.

 

[Harts]

As far as pre-m, that's one vote against and one vote for. I'll see if any other opinions come in.
Thanks!

It isn't about gathering different opinions and going with the consensus. It's about best practices. If you haven't applied any pre-m this year, then go ahead and put down a 6 month rate now. That will take you until February.

If you have done an app already this year, do another application when the previous one runs out - just make sure you are not exceeding the annual limit.