How long is long enough to water new sod? 20-30 minutes in the morning? Additional in the evening?

It's going to depend on the sod type, soil composition and your sprinkler precipitation rate. In the temperatures/full sun we are experiencing in Houston, I wouldn't do less than 2x, likely 3x waterings a day for St. Augustine. You have no established root system, so it can dry out quick.

For Fescue, I've had good luck with my normal duration, but every morning instead of every other day and then adding 3-4 two minute sessions throughout the heat of the day to keep it from burning up.

Neil Sperry can wax eloquent of all this
by giving you inch water/week and how to do it.

At the golf course over construction rubble/clay, it takes a load of water to get roots "out there" at first.
When thay tell you "inches", you'll have to tuna can experiment how much vs minutes that is

Agreed
and bet there was one in-the-day
Thanks for using the term science ... sometimes I wonder

We have news zoysia turn. Sounds like I'll be eating some tuna soon. The last few days I've been watering they've a day and keeping (or at least trying to keep) everything pretty wet. It's all still green and looks/feels good, so I guess I'm on the right track.

I just put down St. Augustine Palmetto and found watering at 5am for about 1 hr, then around 3 pm for 35 minutes then again around 8 pm for another 35 minutes has been really good.

I have some hot spots where my sprinklers don't hit so well....so I try and handwater those areas and I will also move around my main two sprinklers on the 5am, 3pm, 8pm water cycles.

I can not get the entire area of new sod with a before 8 am watering set up. So I have to water at times when it's the middle of the day....not the best...but I have to move the above ground sprinklers around.

I also water after sunset...not the best so I have been told, but again...it's what I am working with.

The new sod is staying pretty wet having been in now exactly 7 days with no rain.

I got one of these to avoid moving sprinklers and hoses:

B-Hyve XD Bluetooth 4-Outlet Hose Faucet Timer

I have it running on a schedule and hitting 3 different zones that get most of the yard pretty well. It waters at 4am for 40 minutes per zone. Then I manually do another 20 minutes or so when I get home. I use the 4th zone for manual watering. It's pretty easy to use because you can run it through an app via bluetooth.

Is there anything I can spray for mosquitoes on new sod. JFC they're bad.

Those timers are helpful. I have a Rain Point 2 hose connection. For me any more than 2 sprinklers and I lose a lot of pressure.

CAR96 said:

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Those timers are helpful. I have a Rain Point 2 hose connection. For me any more than 2 sprinklers and I lose a lot of pressure.

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I like the 4 zone a lot. I can do 3 or more sprinklers per zone depending on type, and that gets me 95% of the coverage I need.

Any weed killer recs? I have some nutsedge coming up with all the watering and want to kill it ASAP

ABATTBQ11 said:

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Any weed killer recs? I have some nutsedge coming up with all the watering and want to kill it ASAP

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I wouldn't spray any herbicide (1) on new sod that doesn't have its roots down or (2) on any sod when daily temps are over 90 deg.

Certainty (for sedge) has no temperature restrictions, but yes I'd wait until rooted

I kind of figured that would be the case. I've considered spot treating reach individual sedge and covering the surrounding area with plastic or something to catch any over spray.