I am in Wisconsin. I think I am done with sprinkling for the year so anytime from now until start of November is good for me. I rather do it while it is a little warm outside. So a good time is after you decide to stop warering and before the lows go to the low 30s?

 

@bodean grow does not stop when soil temps get to 50F. It starts to slow down, but not just stop. For sure it stops when the soil temps get to 32F (frozen ground). The air temps don't reflect soil temps.

For indy, the lawn stops growing the first week of December. Near chicago, it could be a week earlier.

Blow the irrigation before a hard freeze. Halloween weekend is normally good for me.

 

Find out your soil temp here:

https://www.greencastonline.com/tools/soil-temperature#

 

Thanks for the replies and suggestions! Ill look for last week of October or first week of November

 

That's about when I will be blowing mine out. I want to fert one more time and give it a good watering-in before shutting down the sprinklers for the season.

 

That's about when I will be blowing mine out. I want to fert one more time and give it a good watering-in before shutting down the sprinklers for the season.

I'm in Massachusetts and am winterizing my sprinklers on oct 26th.

 

I had 2 lawn care companies blowing out lines on my street yesterday. I thought it was a little early for that so I walked over and talked to the guy that put mine in this spring. He agreed but said they didn't have much to do right now so they started blowing lines. He has 5 systems to install yet this fall but can't get parts. I never would have guessed sprinkler heads would have been one of the items impacted by COVID.

 

I'm outside of Boston and my system is getting blown out and shut down next week. That said, I am somewhat concerned because there are some 70* days coming up and I can't tell how long that will stick around.

Oh well - I can start planning for the spring now and hopefully get ahead of things.

 

Yikes I just got an alert saying freeze alert tonight. Temp will drop down to 29F. I think I better drain my main line and try blowing the lines today.

 

I watered this morning for the last time this season. Looking ahead, almost all of the mornings will be below freezing, and we just got our first dusting of the white stuff this morning. Timers will not go off again till Monday morning, so this weekend will be a good time to blow the lines and heads.